2012 International Energy Conservation Code Update with

Report
2012 International
Energy Conservation
Code Update with Maryland
Amendments
Based on the 2012 International Energy
Conservation Code ®, (IECC ®)
Maryland Code Administration
Description
 This seminar introduces participants to the
major changes from the 2009 IECC to the
2012 IECC with an emphasis on the increase
in energy efficiency improvements.
Participants will discuss the changes and
reasons for the changes. Information
presented will allow participants to apply
these new code requirements to design, plan
review, and/or inspection.
2012 IBC Update
Handout page 1
2
Marginal Markings within
the codebook
*
**
 Solid vertical lines indicate a technical change
from the requirements of the 2009 edition.
 Arrows indicate where a section, paragraph,
item in a list, exception or table has been
deleted.
 A single asterisk [*] indicates that text or a table
has been relocated elsewhere in the code.
 A double asterisk [**] indicates that the section
or table immediately following has been
relocated here from a different section.
2012 IECC Update
3
The new Code Development
Process
Highlights of the plan include:

Maintains 3-year publication cycle

Maintains the ICC Governmental Consensus Process

Divides the codes into two groupings for purposes of Code Development
and Final Action Hearings – one group heard each year.

An unveiling of all the new codes at the Annual Conference in the third year

Holding Code Development Hearings at the same central location every
April/May

Holding all Final Action Hearings at the Annual Conference at locations
which will continue to rotate through the four quadrants of the U.S. in late
October/early November.
2012 IECC Update
4
Letter Designations in Front
of Section Numbers
 The two groups of codes and deadlines for proposals are:
 Group A Codes –
 IBC, IFGC, IMC, IPC, IPSDC
 Proposals due January 3, 2012
 Group B Codes –
 Admin, IEBC, IECC, IFC, IGCC, IPerfC, IPoolC, IPMC, IRC, IWUIC,
IZC.
 Proposals due January 3, 2013
 Each grouping having Code Development and Final Action
Hearings occurring in the spring and fall of the same year
during the first two years of the publication cycle
2012 IECC Update
5
Letter Designations in Front
of IECC Section Numbers
 The content of sections that begin with a letter designation is
maintained by another code development committee:
[CE] = Commercial Energy Code Development Committee
[M] = Mechanical
[RE] = Energy Code Development Committee
2012 IECC Update
6
Maryland Provisions
 Three Part Process
2012 IBC Update
7
Climate Zones
Maryland 4 and 5
2012 IECC Update
8
Annotated Code of
Maryland
 Enabling legislation that creates the
framework for the Maryland Building
Performance Standards.
 Public Safety Article
 TITLE 12. BUILDING AND MATERIAL CODES; OTHER
SAFETY PROVISIONS
 SUBTITLE 5. MARYLAND BUILDING PERFORMANCE
STANDARDS
2012 IBC Update
9
Duties of the Maryland Codes
Administration (COMAR)
 Must adopt as part of the Standard (MBPS) the IBC,
the IRC and the IECC within 12 months of the
issuance by ICC.
 Amendments to the IBC and IRC may not be more
stringent than the provisions found in those
documents.
 Amendments to the IECC must not lessen any
of the IECC requirements.
2012 IBC Update
10
Local Jurisdiction
Amendments
 Local Amendments must not prohibit the
minimum implementation and enforcement
set forth in §12-505
 Review and accept plans
 Issuance of building permits
 Inspection of the work authorized by building
permit
 Issuance of appropriate occupancy
certificates
2012 IBC Update
11
Local Jurisdiction
Amendments
 Local Amendments must not prohibit the
minimum implementation and enforcement set
forth in §12-505




Review and accept plans
Issuance of building permits
Inspection of the work authorized by building permit
Issuance of appropriate occupancy certificates
 Weaken energy conservation and efficiency
provisions of the Standards
2012 IBC Update
12
Local Jurisdiction Implementation
and Enforcement
 Local jurisdictions SHALL implement and
enforce the most current version of the
standards and any local amendments
 No later than 6 months after
adoption by the State.
2012 IBC Update
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Key Maryland Dates
 COMAR adoption of the 2012 IBC:
 January 1, 2012
 Local implementation and Enforcement:
 July 1, 2012
 Local amendments to Maryland Codes
Administrations:
 15 days prior to local effective date
 Or 5 days after emergency local adoption
2012 IBC Update
14
COMAR 05.02.07.03 B.
Terms.
 New term “High performance home” has the meaning
stated in Public Safety Article, §12-509(a), Annotated
Code of Maryland
§ 12-509. Encouragement of high-performance homes
(a) "High-performance home" defined. -- In this section, "highperformance home" means a new residential structure that meets or
exceeds the current version of:
(1) the Silver rating of the International Code Council's 700 National
Green Building Standards; or
(2) the Silver rating of the U.S. Green Building Council's LEED
(Leadership in Energy and Environmental Design) for Homes Rating
System.
2012 IBC Update
15
2012 IECC COMAR
Modifications
 Modifications to the 2012 International Energy
Conservation Code. Add a note to Section
C101, Scope and General Requirements:
Additional requirements concerning energy
conservation for buildings and structures may
be required by the Energy Conservation
Building Standards, Public Utilities Article,
§§7-401 – 7-408, Annotated Code of
Maryland, as amended.
2012 IBC Update
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COMAR 05.02.07.04 E
 New Section added as follows:
E. The Department encourages:
(1) Home builders to construct new high
performance homes; and
(2) Local jurisdictions to amend these standards to
allow builders to construct high performance
homes.
2012 IBC Update
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COMAR Modifications to
the IBC and IRC
 Additional modifications are made as part
of the Maryland Building Performance
Standards to the IBC and the IRC. Those
modifications are part of the Update
Classes for the IBC and IRC are being
offered by the Maryland Codes
Administration through the International
Code Council.
2012 IBC Update with Maryland Amendments
18
Compliance Process
Must the project comply with the
IECC?
Mandatory Provisions
Air Leakage
and
Building Systems
Prescriptive Path
Building Thermal
Envelope and Electrical
R-value
Computation
UA Alternative
Performance Path
Simulated Performance
Alternative
Total UA
Alternative
Document Compliance with IECC
Plan Review
Handout page 6
Field Inspection
19
IECC Plan Review
1. Determine IECC mandatory provisions for air leakage
and building systems are met.
2. Determine if either the prescriptive path or simulated
performance path is used.
3. Determine IECC prescriptive provisions are met for the
building thermal envelope and electrical.
4. Determine if either the R-value computation, UA alternative or
Total UA alternative is used.
1.
2.
3.
Determine IECC provisions for R-value computation are met.
Determine IECC provisions for UA alternative are met.
Determine IECC provisions for Total UA alternative are met.
5. Determine if the provisions for the simulated performance
alternative are met.
6. Document compliance for field inspection staff.
2012 IBC Update with Maryland Amendments
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Field Inspection
Non
compliance
Compliance
•
•
•
•
•
•
Air Barrier Inspection
Sealing Inspection
Fenestration Inspection
Insulation Inspection
Mechanical Inspection
Concealed Service Water
Heating System
Inspection
Non
compliance
Compliance
Final
Inspection
Reinspection
• Exterior Insulation Inspection
• Structural Insulated Panel
Foundation Inspection
• Insulated Concrete Forming
Systems Inspection
• Pre-cast Insulated Concrete
System Inspection
• Crawl space Wall Inspection
Rough
Inspection
Reinspection
Reinspection
Foundation
Inspection
• Insulation –Inspections (4)
• Mechanical – Inspections (5)
• Service Water Heating
Inspections (3)
• Snow Melt Controls Inspection
• Swimming Pool Inspections (3)
• Certificate Inspection
Non
compliance
Compliance
Certificate of Occupancy
2012 IECC Update
2012 IBC Update with Maryland Amendments
21
21
IECC Inspection
1. Determine compliance method used for project.
2. Field inspections will normally occur at the following stages;
1.
2.
3.
Foundation/Slab inspection
Rough Inspection
Final Inspection
3. Verify during the required inspections that the project
complies with the prescriptive or performance provisions as
determined during the Plan Review
2012 IBC Update with Maryland Amendments
22
IECC Inspection
5. Verify compliance with mandatory provisions of the code;
1.
2.
3.
4.
5.
6.
Air Leakage
HVAC System Controls
Duct Sealing
Mechanical System Piping
Circulating Hot Water Systems.
6.
7.
8.
Mechanical Ventilation, equipment
sizing
Swimming pool heating, time
switches and covers.
Lighting Equipment
Verify third party inspection for sealing of Building Thermal Envelope and
Duct tightness are within code specified limits.
•
(Duct Tightness testing not required when ducts and air handlers are
entirely within the building thermal envelope.)
2012 IBC Update with Maryland Amendments
23
IECC Inspection
5. Verify compliance with mandatory provisions of the code;
1.
2.
3.
4.
5.
Air Leakage
HVAC System Controls
Duct Sealing
Mechanical System Piping
Circulating Hot Water
Systems.
6.
7.
8.
Mechanical Ventilation,
equipment sizing
Swimming pool heating, time
switches and covers.
Lighting Equipment
6. Verify third party inspection for sealing of Building Thermal
Envelope and Duct tightness are within code specified limits.
•
(Duct Tightness testing not required when ducts and air handlers
are entirely within the building thermal envelope.)
2012 IBC Update with Maryland Amendments
24
Arrangement and format of
the 2012 IECC
 The IECC contains two separate sets of
provisions.
 The IECC—Residential Provisions apply to detached
one- and two-family dwellings and multiple single
family dwellings as well as Group R-2, R-3 and R-4
buildings three stories or less in height.
 The IECC—Commercial Provisions apply to all
buildings that are not included in the definition of
“Residential buildings”.
2012 IECC Update
Handout page 2
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Arrangement and format of the
2012 IECC
 IECC—Commercial
Provisions, therefore,
contain provisions for
residential buildings
four stories or greater
in height.
2012 IECC Update
Handout page 2
26
Arrangement and format of
the 2012 IECC
 Each set of provisions is independent;
containing a chapter in:




Scope and Administration,
Definitions,
General Requirements and
Energy Efficiency Requirements applicable to
buildings within its scope.
2012 IECC Update
Handout page 2
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Table of Contents
2012 IECC Update
Handout page 2
28
Chapter 1
Scope and Administration
2012 IECC Update
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Chapter 1
Scope and Administration
 Changes Identical for both Commercial
and Residential
2012 IECC Update
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Chapter 1
Scope and Administration
Chapter 1: Scope and Administration
Code Section
Section Description of Change
2012
2009 Title
CR101.2 Scope
Added building site and
101.2 101.2
associated systems and
equipment
CR101.3 Intent
Added that the regulation of the
101.3 101.3
code will conserve energy over
useful life of the each building.
C106 R106 106.1 Referenced Added information on conflicts
Standards and provisions in referenced
codes and standards
2012 IECC Update
Handout page 3
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Chapter 1
Scope and Administration
1. What will conserve energy over the useful
life of each building?
Constructing and using the mechanical
systems, service water-heating systems,
and electric power and lighting systems
located on the building and on the building
site in accordance with this code.
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32
Chapter 2
Definitions
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Chapter 2 Definitions
 NEW for Commercial Buildings
 Building commissioning
 A process that verifies and documents that
the selected building systems have been
designed, installed and function according
to the owner’s project requirements and
construction.
2012 IECC Update
Handout page 3
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Chapter 2 Definitions
 NEW for Commercial
Buildings
 Building entrance
 Any door, set of doors,
doorway or other form of
portal that is used to gain
access to the building
from outside by the
public.
2012 IECC Update
Handout page 3
35
Chapter 2 Definitions
 NEW for Commercial/Residential
 Building site
 A contiguous area of land that is under the
ownership or control of one entity.
2012 IECC Update
Handout page 3
36
Chapter 2 Definitions
 NEW for Commercial Buildings
 Coefficient of performance (COP)—
Cooling
 The ratio of the rate of heat removal to the
rate of energy input, in consistent units, for
a complete refrigerating system or some
specific portion of that system under
designated operating conditions.
2012 IECC Update
Handout page 3
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Chapter 2 Definitions
 NEW for Commercial Buildings
 Coefficient of performance (COP)—
Heating
 The ratio of the rate of heat removal to the rate
of heat delivered to the rate of energy input, in
consistent units, for a complete heat pump
system, including the compressor and, if
applicable, auxiliary heat, under designated
operating conditions.
2012 IECC Update
Handout page 3
38
Chapter 2 Definitions
 NEW for Commercial/Residential
 Continuous air barrier
A combination of materials and assemblies
that restrict or prevent the passage of air
through the building thermal envelope.
2012 IECC Update
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Chapter 2 Definitions
 NEW for Commercial/Residential
 Demand recirculation water system
 A water distribution system where pump(s)
prime the service hot water piping with
heated water upon demand for hot water.
2012 IECC Update
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Chapter 2 Definitions
 NEW for Commercial
Dynamic glazing
Any fenestration
product that has the
fully reversible ability to
change its performance
properties, including
U-factor, solar heat gain
coefficient (SHGC), or
VT.
2012 IECC Update
Handout page 3
41
Chapter 2 Definitions
 NEW for Commercial
 Enclosed space
 A volume surrounded by solid surfaces,
such as walls, floors, roofs and openable
devices, such as doors and operable
windows.
2012 IECC Update
Handout page 3
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Chapter 2 Definitions
 NEW for Commercial
 Equipment room
 A space that contains
electrical equipment,
mechanical equipment,
machinery, water pumps or
hydraulic pumps that are a
function of the building’s
services.
2012 IECC Update
Handout page 3
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Chapter 2 Definitions
 NEW for Commercial
 Fenestration product, field fabricated
 A fenestration product whose frame is made at the
construction site of standard dimensional lumber or
other materials that were not previously cut, or
otherwise formed with the specific intention of being
used to fabricate a fenestration product or exterior
door. Field fabricated does not include site-built
fenestration.
2012 IECC Update
Handout page 4
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Chapter 2 Definitions
 NEW for Commercial/Residential
 Fenestration product, site-built
A fenestration designed to be made up of fieldglazed or field-assembled units using specific
factory cut or otherwise factory formed framing
and glazing units. Examples of site-built
fenestration include storefront systems, curtain
walls, and atrium roof systems.
2012 IECC Update
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Chapter 2 Definitions
 NEW for Commercial
 Furnace electricity ratio
 The ratio of furnace electricity use to total
furnace energy computed as ratio
= (3.412 × EAE)/1000 × Ef+ 3.412 × EAE)
 EAE (average annual auxiliary electrical consumption)
 Ef (average annual fuel energy consumption)
 Ef is expressed in millions of Btu’s per year.
2012 IECC Update
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Chapter 2 Definitions
 NEW for Commercial
 General lighting
 Lighting that provides a substantially
uniform level of illumination throughout an
area. General lighting shall not include
decorative lighting or lighting that provides
a dissimilar level of illumination to serve a
specialized application or feature within
such area.
2012 IECC Update
Handout page 4
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Chapter 2 Definitions
 NEW for Commercial
 Integrated part load value (IPLV)
 A single-number figure of merit based on
part-load energy efficiency ratio (EER),
COP, or kW per ton expressing part-load
efficiency for airconditioning and heat
pump equipment on the basis of weighted
operation at various load capacities for
equipment.
2012 IECC Update
Handout page 4
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Chapter 2 Definitions
 NEW for Commercial
 Nonstandard part load value (NPLV)
 A single-number part-load efficiency figure
of merit calculated and referenced to
conditions other than IPLV conditions, for
units that are not designed to operate at
ARI standard rating conditions.
2012 IECC Update
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Chapter 2 Definitions
 NEW for Commercial
 On-site renewable energy
Energy derived from solar
radiation, wind, waves, tides,
landfill gas, biomass, or the
internal heat of the earth. The
energy system providing
on-site renewable energy
shall be located on the
project site.
2012 IECC Update
50
Chapter 2 Definitions
 NEW for Commercial/Residential
 Visible Transmittance (VT)
The ratio of visible light entering the space
through the fenestration product assembly to the
incident visible light. VT includes the effects of
glazing material and frame and is expressed as
a number between 0 and 1
2012 IECC Update
Handout page 4
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Chapter 2 Definitions
 NEW for Residential
 Whole House Mechanical
Ventilation System
An exhaust system, supply
system, or combination thereof
that is designed to mechanically
exchange indoor air with outdoor
air when operating continuously or
through a programmed
intermittent schedule to satisfy the
whole house ventilation rates
2012 IECC Update
Handout page 4
52
Chapter 2 Definitions
 REVISED for
Commercial/Residential
 Building
 Any mechanical systems,
service water heating
systems and electric
power and lighting
systems located on the
building site and
supporting the building.
2012 IECC Update
Handout page 4
53
Chapter 2 Definitions
 REVISED for
Commercial/Residential
 Residential Building
 Revised to clarify that it
includes one- and two-family
dwellings and multiple single
family dwellings (townhouses).
2012 IECC Update
Handout page 4
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Chapter 2 Definitions
 REVISED for Commercial/Residential
 Skylight
 Revised to “slope less than 60 degrees
(1.05 rad).”
2012 IECC Update
Handout page 4
55
Chapter 2 Definitions
2. What is the difference between building
and building site?
A building is any structure used or intended for
supporting or sheltering any use or occupancy,
including any mechanical systems, service
water-heating systems, and electric power and
lighting systems located on the building site
and supporting the building. A building site is a
contiguous area of land that is under the
ownership or control of one entity.
2012 IECC Update
Handout page 5
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Chapter 2 Definitions
3. What is a whole-house mechanical
ventilation system?
Whole-house mechanical ventilation system is an
exhaust system, supply system or combination
thereof that is designed to mechanically
exchange indoor air with outdoor air when
operating continuously or through a
programmed intermittent schedule to satisfy the
whole-house ventilation rates.
2012 IECC Update
Handout page 5
57
Chapter 2 Definitions
4. What is a continuous air barrier?
A combination of materials and assemblies
that restrict or prevent the passage of air
through the building thermal envelope.
2012 IECC Update
Handout page 5
58
Chapter 3
General Regulations
2012 IECC Update
59
Chapter 3 General Requirements
 REVISED for Commercial/Residential
 Materials, Systems and Equipment
 Revised to give three options.
1. ANSI/ASHRAE/IESNA 90.1;
2. The requirements of Sections C402 through
C405;
3. The requirements of Sections C402.4,
C403.2, C404, C405.4, C405.6 and C405.7.
2012 IECC Update
Handout page 5
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Chapter 3 General Requirements
 REVISED for Commercial/Residential
 C303.1.3/R303.1.3
Fenestration product rating:
“Label or Table”
2012 IECC Update
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Chapter 3 General Requirements
 Label or Table Solutions
 National Fenestration Rating Council
 Component Modeling Approach (CMA) for site-built commercial
windows.
 Field Labeling available for missing labels.
2012 IECC Update
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Chapter 3 General Requirements
 REVISED for Commercial/Residential
 C303.1.3/R303.1.3 Fenestration product rating
 Tables C303.1.3(3)& R303.1.3(3) Default Glazed
Fenestration
Include visible transmittance (VT)
2012 IECC Update
Handout page 5-6
63
Chapter 3
General Regulations
5. What is the importance of VT values?
Visible transmittance (VT) indicates the
effects of glazing material and frame.
2012 IECC Update
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64
Chapter 3
General Regulations
6. What is the VT value for a double glazed,
tinted window?
Visible transmittance (VT) for a double
glazed, tinted window is 0.3
2012 IECC Update
Handout page 6
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Chapter 4
Commercial Energy Efficiency
2012 IECC Update
66
Section C401 General
 REVISED
 The section has been
revised for clarity.
Compliance with
ANSI/ASHRAE/IESNA
90.1 is still an acceptable
alternative.
2012 IECC Update
Handout page 6
67
Section C402 Building Envelope
Requirements
 REVISED
 Building envelope
performance are more
stringent. For example:
1. Roof solar reflectance
and thermal emittance.
2. Insulation performance is
improved.
3. Fenestration performance
allows more flexibility.
4. Air leakage requirements
expanded.
2012 IECC Update
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Table R402.1.1 Insulation & fenestration
requirements by component
 REVISED
 Fenestration and skylight U-factors are improved.
 Ceiling insulation R-values increase:
 R-30 to R-38 in Climate Zones 2 and 3, and
 R-38 to R-49 in Climate Zones 4 and 5.
 Wall insulation R-values increase from R-13 to R-20 or
R-13 + 5 in Climate Zones 3 and 4.
 Note h clarified regarding continuous isolation.
 Add SHGC 0.40 requirement for windows in Climate
Zone 4.
2012 IECC Update
Handout page 17
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Table R402.1.1 Insulation & fenestration
requirements by component
Maryland Climate Zones 4 and 5
2012 IECC Update
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Table R402.1.1 Insulation & fenestration
requirements by component
 Note h. First value is cavity insulation, second is
continuous insulation or insulated siding, so “13+5”
means R-13 cavity insulation plus R-5 continuous
insulation or insulated siding.
 If structural sheathing covers 40 percent or less of
the exterior, continuous insulation R-value shall be
permitted to be reduced by no more than R-3 in the
locations where structural sheathing is used – to
maintain a consistent total sheathing thickness.
2012 IECC Update
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Table R402.1.1 Insulation & fenestration
requirements by component
2012 IECC Update
72
Table R402.1.3
Equivalent U-Factors
 REVISED
 Data and footnotes changed.
2012 IECC Update
Handout page 17
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Table R402.1.3
Equivalent U-Factors
2012 IECC Update
74
R402.1.4 Total UA alternative.
 If the total building thermal envelope UA (sum of U-factor
times assembly area) is less than or equal to the total UA
resulting from using the U-factors in Table R402.1.3
(multiplied by the same assembly area as in the
proposed building), the building shall be considered in
compliance with Table R402.1.1.
 The UA calculation shall be done using a method
consistent with the ASHRAE Handbook of Fundamentals
and shall include the thermal bridging effects of framing
materials.
 The SHGC requirements shall be met in addition to UA
compliance.
2012 IECC Update
75
Table C402.2.1.1
NEW
2012 IECC Update
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C402.2.6 Slabs on grade
 REVISED
 Added exception that where the slab-ongrade floor is greater than 24 inches (61
mm) below the finished exterior grade,
perimeter insulation is not required.
2012 IECC Update
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C402.2.8 Insulation of radiant
heating systems
 NEW
 Radiant heating
design information
added and the bottom
surfaces of floor
structures
incorporating radiant
heating shall be
insulated.
2012 IECC Update
Handout page 6
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C402.3.1 Maximum area
 REVISED
 Excludes opaque spandrel panels also in
vertical fenestration areas, which shall not
exceed 30 percent of the above-grade wall
area. The skylight area shall not exceed 3
percent of the gross roof area.
2012 IECC Update
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C402.3.1.1 Increased vertical fenestration
area with daylighting controls
 NEW
 In Climate Zones 1 through 6, a maximum
of 40 percent of the gross above-grade
wall area shall be permitted, provided
three items are adhered to and added
exception.
2012 IECC Update
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C402.3.1.2 Increased skylight
area with daylighting controls
 NEW
 Skylight area increased from 3 to 5
percent with automatic daylighting
controls.
2012 IECC Update
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Section C402.3.2 Minimum
skylight fenestration area
 NEW
 Certain spaces greater
than 10,000 square feet
(1393 m2) and with
ceiling heights greater
than 15 feet (4572 mm)
are required to provide
a total daylight zone
under skylights of not
less than half the floor
area.
2012 IECC Update
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C402.3.2.1 Lighting controls in
daylight zones under skylights
 NEW
 Lighting in the daylight zone shall be
controlled by multilevel lighting controls
with exception.
2012 IECC Update
Handout page 7
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Table C402.3.3.1
SHGC Adjustment Multipliers
 NEW
 Table of SHGC adjustment multipliers
2012 IECC Update
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C402.3.3.2 Increased vertical
fenestration SHGC
 NEW
 In Climate Zones 1 through 3, vertical
fenestration entirely located not less than
6 feet (1729 mm) above the finished floor
shall be permitted a maximum of SHGC of
0.40.
2012 IECC Update
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C402.3.3.3
Increased skylight SHGC
 NEW
 In Climate Zones 1
through 6 skylights
shall be permitted a
maximum SHGC of
0.60 where located
above daylight zones
provided with
automated daylighting
controls.
2012 IECC Update
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C402.3.3.4
Increased skylight U-factor
 NEW
 Where skylights are installed above
daylight zones provided with automatic
daylighting controls, a maximum U-factor
of 0.9 shall be permitted in Climate Zones
1 through 3, and a maximum U-factor of
0.75 shall be permitted in Climate Zones 4
through 8.
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87
C402.3.3.5 Dynamic glazing
 NEW
 Dynamic glazing requirements.
 Dynamic glazing shall be considered separately
from other fenestration, and area-weighted
averaging with other fenestration that is not
dynamic glazing shall not be permitted.
2012 IECC Update
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88
C402.3.4
Area-weighted U-factor
 NEW
 Area weighted U-factor is permitted to
satisfy the U-factor requirements for
commercial buildings.
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89
C402.4.1 Air barriers
 NEW
 A continuous air
barrier shall be
provided throughout
the building thermal
envelope with
exception in Climate
Zones 1, 2 and 3.
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90
C402.4.1.1
Air barrier construction
 NEW
 Construction details of air barriers with
exception.
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91
Section C402.4.1.2 Air barrier
compliance options
 NEW
 Three options-choose from one or all:
 Materials
 Assemblies
 Building Test
2012 IECC Update
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92
Section C402.4.1.2.1
Materials (Option)
NEW
Materials deemed to comply if installed properly:




3/8-inch (10 mm)
plywood.
3/8-inch (10 mm) OSB.
½-inch (12 mm)
Extruded polystyrene.
½-inch (12 mm) Foil
backed
polyisocyanurate.
2012 IECC Update
 1 ½-inch (36 mm)
Closed cell spray foam.
 4 ½-inches (113 mm)
Open cell spray foam
 ½-inch (12 mm)
Gypsum board.
 ½-inch (12 mm)
Cement board.
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93
Section C402.4.1.2.1
Materials (Option)
NEW
Materials deemed to comply if installed properly:
 Built up roofing.
 Modified bitumen
roofing.
 Fully adhered single
ply roofing.
 5/8- inch (16 mm)
Portland sand parge
or gypsum plaster.
2012 IECC Update
 Cast in place or
precast concrete.
 Fully grouted block
masonry.
 Sheet steel or
aluminum.
Handout page 8
94
Section C402.4.1.2.2
Assemblies (Option)
 NEW
 Presumptive compliance if installed
properly:
 Sealed concrete masonry wall units (CMU) or
 ½-inch (12 mm) parge, stucco or plaster
2012 IECC Update
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95
Section C402.4.1.2.3
Building test (Option)
 NEW
 Building air leakage
rate cannot exceed
0.40 cfm/ft2 at 0.3
inches water gauge
(0.2 L/s · m2 at 75 Pa)
in accordance with
ASTM E 779.
2012 IECC Update
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96
Section C402.4.3
Air leakage of fenestration
 REVISED
 Fenestration
assemblies are
required to be NFRC
tested and labeled
unless:
 Field Fabricated (note
definition) or
 Entire Building Test
per C402.4.1.2.3
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97
Table C402.4.3 MAXIMUM AIR INFILTRATION
RATE FOR FENESTRATION ASSEMBLIES
2012 IECC Update
98
C402.4.4 Doors and access openings to
shafts, chutes, stairways, and elevator
lobbies
 NEW
 Requirements for
doors and access
openings from
conditioned space to
shafts, chutes,
stairways and
elevator lobbies with
exception.
2012 IECC Update
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99
C402.4.5 Air intakes, exhaust
openings, stairways and shafts
 REVISED
 Stairway enclosures and elevator shaft
vents, and other outdoor intakes and
exhaust openings, integral to the building
envelope shall be provided with dampers,
whereas before they had to be Class I
motorized dampers with maximum
leakage rate.
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100
C402.4.5.1
Stairway and shaft vents
 NEW
 Stairway and shaft vents shall be provided
with Class I motorized dampers with max.
leakage rate.
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C402.4.5.2 Outdoor air intakes
and exhausts
 NEW
 Outdoor air supply and exhaust openings
shall be provided with Class IA motorized
dampers with exceptions.
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102
C402.4.7 Vestibules
 REVISED
 Requirements for vestibules have been
clarified; i.e., employee only doors are
explicitly exempted.
2012 IECC Update
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103
C403
Building Mechanical Systems
 NEW
 Specific standards for
certain heating,
ventilation and
airconditioning
(HVAC) system types.
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104
C403.2.3.1 Water-cooled
centrifugal chilling packages
 NEW
 Maximum full load kW/ton and NPLV
ratings adjusted using equations was an
exception in 2009 IECC.
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105
C403.2.3.2 Positive displacement (air
and water-cooled chilling packages)
 NEW
 Positive displacement chilling packages
were not covered by the 2009 IECC.
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106
Table C403.2.3(8)
Heat Rejection Equipment
 NEW
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107
Table C403.2.3(9)
Heat Transfer Equipment
 NEW
 New table of liquid-to-liquid heat exchangers not
requiring a minimum efficiency, listing test
procedure with footnote.
EQUIPMENT
TYPE
SUBCATEGORY
MINIMUM
EFFICIENCY
TEST
PROCEDUREa
Liquid-to-liquid
heat exchangers
Plate type
NR
AHRI 400
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C403.2.4.3.3
Automatic start capabilities
 NEW
 Automatic start-control requirements.
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109
C403.2.5.1
Demand controlled ventilation
 REVISED
 Changed occupant load to 25 people per
1,000 square feet (93 m2) of floor area;
and changed exception requirements.
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110
C403.2.6 Energy recovery
ventilation systems
 REVISED
 Changed supply airflow rate and revised
exceptions from 2009 IECC.
2012 IECC Update
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111
Table C403.2.6
Energy Recovery Equipment
 NEW
 New table of climate zones to percent of outdoor
air for design supply fan airflow rate.
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112
C403.2.8 Piping insulation
 REVISED
 Exception 3 regarding temperature range.
 Piping that conveys fluids that have a
design operating temperature range
between 60°F (15°C) and 105°F (41°C).
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113
C403.2.8.1
Protection of piping insulation
 NEW
 Piping insulation requirements to protect
piping.
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114
C403.2.9 Mechanical systems
commissioning and completion
requirements
 NEW
 Mechanical systems shall be
commissioned and completed in
accordance with Section C408.2.
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115
C403.2.10.1 Allowable fan floor
horsepower
 REVISED
 Exception: The following fan systems are
exempt from allowable fan floor horsepower
requirement.
1. Hospital, vivarium and laboratory systems that utilize
flow control devices on exhaust and/or return to
maintain space pressure relationships.
2. Individual exhaust fans with motor nameplate
horsepower of 1 hp or less.
2012 IECC Update
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116
Table C403.2.10.1(2) Fan Power
Limitation Pressure Drop
Adjustment
REVISED
 Revised data.
DEVICE
ADJUSTMENT
Credits
Credits
Fully ducted return and/or exhaust air
systems
0.5 inch w.c. (2.15 in w.c. for laboratory
and vivarium systems)
Biosafety cabinet
Pressure drop of device at fan system
design condition.
Energy recovery device, other than coil (2.2 × energy recovery effectiveness) –
runaround loop
0.5 inch w.c. for each airstream
Coil runaround loop
0.6 inch w.c. for each airstream
Exhaust system serving fume hoods
0.35 inch w.c.
Laboratory and vivarium exhaust
systems in high-rise buildings
0.25 inch w.c./100 feet of vertical duct
exceeding 75 feet
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C403.3.1 Economizers
 REVISED
 Economizer requirements increased.
2012 IECC Update
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118
Table C403.3.1(1)
Economizer Requirements
 REVISED
 Climate zones’ economizer requirements
and cooling systems greater than 33,000
Btu/h (9,672 W) whereas it was 54,000
Btu/h. (15,827 W). Footnote a revised.
2012 IECC Update
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119
Section C403.3.1.1
Air economizers
 NEW
 Air economizers shall comply with
Sections C403.3.1.1.1 through
C403.3.1.1.4. Design capacity
economizer, air economizers, control
signal, high-limit shutoff and relief of
excess outdoor air.
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120
Table C403.3.1.1.3(1) High-limit Shutoff
Control Options for Air Economizers
 NEW
 Table lists climate zones and allowed
control types for air economizers.
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121
Table C403.3.1.1.3(2) High-limit Shutoff
Control Setting for Air Economizers
 NEW
 Table lists device type per climate zone
with required high limit noting temperature
of outside air to return air; and outdoor
temperatures.
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122
C403.4.1 Economizers
 REVISED
 Water economizers shall comply with
Sections C403.4.1.1 through C403.4.1.4
for design capacity, maximum pressure
drop, integrated economizer control and
economizer heating system impact.
2012 IECC Update
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123
C403.4.2 Variable air volume
(VAV) fan control
 REVISED
 VAV fans with 7.5-horsepower (5.6 kW)
motor requirements, whereas in 2009
IECC it was VAV fans with 10 horsepower
(7.5 kW) requirements. Also, additional
sections on static pressuresensor location
and set points for direct digital control.
2012 IECC Update
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124
C404 Service Water Heating
REVISED
1. Piping insulation requirement beneficial.
2. Controls to be readily accessible.
3. Pools and spas requirement revised.
2012 IECC Update
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125
Section C404.5
Piping insulation
 REVISED
 Added exception to allow manufacturer’s
insulation instructions for heat-traced
piping systems.
2012 IECC Update
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126
Section C 404.6
Hot water system controls
 NEW
 Added manual operation to
circulating hot water
system so that pumps or
heat trace can be turned off
when there is limited hot
water demand. Ready
access shall be provided to
the operating controls.
2012 IECC Update
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127
Section C404.7 Pools and inground
permanently installed spas
 REVISED
 Pools and in ground,
permanently installed
spas shall comply
with Sections
C404.7.1 through
C404.7.3 regarding
heaters, time
switches and covers.
2012 IECC Update
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128
Section C405 Electrical Power
and Lightning System
 REVISED
 Lighting Control requirements are
expanded.
 Space-by-space option added.
2012 IECC Update
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129
C405.2.1
Manual lighting controls
 REVISED
 All buildings shall include manual lighting
controls, whereas in the 2009 IECC
lighting systems were provided with
controls.
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130
C405.2.1.2 Light reduction
controls
 REVISED
 Exceptions revised.
2012 IECC Update
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131
C405.2.2
Additional lighting controls
 REVISED
 Added four exceptions.
 Additional lighting controls need not be
provided in the following spaces:
1. Sleeping units.
2. Spaces where patient care is directly provided.
3. Spaces where an automatic shutoff would endanger
occupant safety or security.
4. Lighting intended for continuous operation.
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132
C405.2.2.2 Occupancy sensors
 NEW
 Occupancy sensors requirements.
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133
C405.2.2.3 Daylight zone control
 REVISED
 Each daylight control zone shall not
exceed 2,500 square feet (232 m2).
Manual daylighting controls, automatic
daylighting controls and multilevel lighting
controls added.
2012 IECC Update
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134
C405.2.3
Specific application controls
 NEW
 Specific application controls requirements.
2012 IECC Update
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135
C405.5.2
Interior lighting power
 REVISED
 Building area and space-by-space
methods to determine the total interior
lighting power allowance.
2012 IECC Update
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136
Tables C405.5.2(1, 2) Interior Lighting Power
Allowances: Building Area Method and Spaceby space Method
 REVISED
 Tables list building areas and lighting
power densities and formulas to determine
interior lighting power allowances.
2012 IECC Update
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137
Section C406 Additional
Efficiency Package Options
 NEW
 Choose one:
1. Efficient HVAC performance
2. Efficient lighting
3. On-site renewable energy
2012 IECC Update
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138
C406.2
Efficient HVAC performance
 NEW
 Equipment shall meet
the minimum
efficiency
requirements of
Tables 506.2(1)
through (7).
2012 IECC Update
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139
Tables C406.2(1, 2, 3) Equipment by
Size and Minimum Efficiency
 REVISED
 Air conditioners, heat pumps and
packaged terminal AC and heat pumps
listed by size and efficiency.
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140
Table C406.2(4)
 Warm Air Furnaces and Combination
Warm Air Furnaces/Air-Conditioning Units,
Warm Air Duct Furnaces and Unit Heaters,
Efficiency Requirements
 REVISED
 Table for equipment by size and their
minimum efficiencies for climate zones
and test procedure required.
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141
Table C406.2(4)
2012 IECC Update
142
Table C406.2(5) Boilers,
Efficiency Requirements
 REVISED
 Table lists equipment by steam and hot water
rather than if boiler is gas or oil fired.
2012 IECC Update
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143
Table C406.2(6) Chillers—
Efficiency Requirements
 REVISED
 Revised table data and footnotes.
2012 IECC Update
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144
C406.3
Efficient lighting system
 NEW
 Whole building lighting power density
requirements.
2012 IECC Update
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145
Table C406.3
Reduced Interior Lighting Power
 NEW
 Table for reduced interior lighting power
density (LPD) for building area types.
2012 IECC Update
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146
Section C406.4
On-site Renewable Energy
 NEW
 Total minimum ratings of on-site
renewable energy systems shall
comply with one of the following:
 Provide not less than 1.75 Btu’s (1850
W) or 0.50 watt per square foot (5.4
W/m2) of conditioned floor area.
 Provide not less than 3 percent of the
energy used within the building for
building mechanical and service water
heating equipment and lighting.
2012 IECC Update
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147
Section C408
System Commissioning
 NEW
 Verifies that the building has been built
and is operating as designed.
 C408.2 Mechanical systems commissioning
and completion requirements.
 C408.3 Lighting system functional testing.
2012 IECC Update
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148
Section C408.2 Mechanical systems
commissioning and completion requirements
 NEW
 Prior to passing the final mechanical
inspection, the registered design
professional shall provide evidence of
mechanical systems commissioning and
completion.
2012 IECC Update
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149
Section C408.2.1
Commissioning plan
 NEW
 A commissioning plan shall be developed
by a registered design professional or
approved agency.
2012 IECC Update
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150
Section C408.2.2
Systems adjusting and balancing
 NEW
 HVAC systems adjusting and balancing
activities
 Air systems
 Hydronic systems
2012 IECC Update
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151
Section C408.2.3
Functional performance testing




NEW
C408.2.3.1 Equipment.
C408.2.3.2 Controls.
C408.2.3.3 Economizers.
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152
Section C408.2.4
Preliminary commissioning
report
 NEW
 Completed and certified by the registered
design professional or approved agency.
2012 IECC Update
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153
Section C408.2.5
Documentation requirements
 NEW
 Provide to building owner within 90 days of
certificate of occupancy.




Drawings.
Manuals.
System balancing report.
Final commissioning report.
2012 IECC Update
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154
C408.3 Lighting system
functional testing
 NEW
 Controls for automatic lighting systems.
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155
C408.3.1
Functional testing
 NEW
 Testing that will ensure that control
hardware and software are calibrated,
adjusted, programmed and in proper
working condition.
2012 IECC Update
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156
Chapter 4: Commercial
Energy Efficiency
7.For
List
the roof requirements
for requirements
a
commercial
buildings, the roof
are
as follows: building in this code.
commercial
Low-sloped roofs shall have one or more options:
a. Three-year aged solar reflectance of 0.55 and
three-year
aged thermal emittance of 0.75.
b. Initial solar reflectance of 0.7 and initial
emittance of 0.75.
c. Three-year-aged solar reflectance index of 64.
d. Initial solar reflectance index of 82.
2012 IECC Update
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Chapter 4: Commercial
Energy Efficiency
minimum
skylight
fenestration
area (see
Section
8.The
What
is the
minimum
skylight
fenestration
C402.3.2), the total daylight zone under skylights shall be
area?
not less than half the floor area and shall provide a
minimum skylight area to daylight zone under skylights of
either:
– Not less than 3 percent with a skylight VT of at least 0.4.
– Provide a minimum skylight effective aperture of at least 1
percent determined by the equation:
Skylight effective aperture =
0.85 x skylight area x skylight VT x WT
(area weighted average well factor).
2012 IECC Update
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158
Chapter 4: Commercial
Energy Efficiency
9. Buildings
The buildings
shall shall
comply
comply
with one
withof
one
theof the
additional
three additional
efficiency
energy
packages
efficiency
as follows:
–packages
C406.2 Efficient
listed inHVAC
this code.
Performance.
What are the
–three
C406.3
additional
Efficientenergy
(whole-building)
efficiency lighting
packages?
system.
– C406.4 On-Site Renewable Energy
(0.5 W/ft² or 3 percent).
2012 IECC Update
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Chapter 4: Commercial
Energy Efficiency
10.List
theMechanical
requirements
ofcommissioning
mechanicaland
Section
C408.2
systems
completion
requirements.
Prior to passing
final
systems
commissioning
andthe
completion
mechanical inspection, the registered design professional shall
in this code.
provide evidence of mechanical systems commissioning and
completion in accordance with the provisions of this section.
Construction document notes shall clearly indicate provisions
for commissioning and completion requirements, and are
permitted to refer to specifications for further requirements.
Copies of all documentation shall be given to the owner and
made available to the code official upon request.
2012 IECC Update
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160
Chapter 4: Commercial
Energy Efficiency
A 11.What
functional test
an economizer
is the
of its
is for
a functional
test
foroperation
an
components
and its interfacing
in accordance
economizer?
What relationships
is a functional
test forwith
approved plans and specifications such that operation, function
control hardware
and
software?
and maintenance
serviceability
is confirmed.
Testing shall
include all modes and sequence of operation, including under
full load, part load and following emergency conditions.
Functional testing for control hardware and software are
calibrated, adjusted, programmed and in proper working
condition in accordance with the construction documents and
manufacturer’s instructions.
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167
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168
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169
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170
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171
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172
2012 IECC Update
173
Chapter 4
Residential Energy Efficiency
2012 IECC Update
174
R401.2 Compliance
 REVISED
 Added that projects comply with either
mandatory and with either “prescriptive” or
performance approach rather than section
references in the code.
 For example: 401.3 Certificate
(Mandatory) or 402.1 General
(Prescriptive).
2012 IECC Update
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175
R401.3 Certificate
 REVISED
 Certificate shall be completed and posted
by builder or registered design
professional.
2012 IECC Update
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176
Section R402
Building Thermal Envelope
 REVISED
1. Insulation & fenestration values
improved.
2. Eave baffles.
3. Steel frame wall values added.
4. Sunrooms have been reworked.
5. Air leakage controls are required.
2012 IECC Update
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177
Table R402.1.1 Insulation & fenestration
requirements by component
 REVISED
 Fenestration and skylight U-factors are improved.
 Ceiling insulation R-values increase:
 R-30 to R-38 in Climate Zones 2 and 3, and
 R-38 to R-49 in Climate Zones 4 and 5.
 Wall insulation R-values increase from R-13 to R-20 or
R-13 + 5 in Climate Zones 3 and 4.
 Note h clarified regarding continuous isolation.
 Add SHGC 0.40 requirement for windows in Climate
Zone 4.
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Table R402.1.1 Insulation & fenestration
requirements by component
Maryland Climate Zones 4 and 5
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179
Table R402.1.1 Insulation & fenestration
requirements by component
 Note h. First value is cavity insulation, second is
continuous insulation or insulated siding, so “13+5”
means R-13 cavity insulation plus R-5 continuous
insulation or insulated siding.
 If structural sheathing covers 40 percent or less of
the exterior, continuous insulation R-value shall be
permitted to be reduced by no more than R-3 in the
locations where structural sheathing is used – to
maintain a consistent total sheathing thickness.
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Table R402.1.1 Insulation & fenestration
requirements by component
2012 IECC Update
181
Table R402.1.3
Equivalent U-Factors
 REVISED
 Data and footnotes changed.
2012 IECC Update
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182
Table R402.1.3
Equivalent U-Factors
2012 IECC Update
183
R402.2 Specific insulation
requirements
 REVISED
 In addition to the requirements of Section
R402.1, insulation shall meet the specific
requirements of Sections R402.2.1
through R402.2.12.
2012 IECC Update
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184
R402.2.3 Eave baffle
 NEW
 A baffle is required adjacent to soffit and
eave vents.
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185
R402.2.6 Steel-frame ceilings,
walls and floors
 REVISED
 Changed references to Sections in this
code.
2012 IECC Update
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186
Table R402.2.6 Steel-Frame Ceiling,
Wall and Floor Insulation R Values
 REVISED
 Data for steelframed wall 16
inches (406 mm) on
center and steelframed wall 24
inches (610 mm) on
center was added.
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187
R402.2.12 Sunroom insulation
 REVISED
 Title and
requirements with
exceptions.
2012 IECC Update
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188
R402.3 Fenestration
 REVISED
 Requirements of fenestration with
Sections R402.3.1 through R402.3.6.
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189
R402.3.5 Sunroom U-factor
 REVISED
 Fenestration requirements with exception
for sunrooms. U factor values changed
from 2009 IECC.
2012 IECC Update
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190
R402.4.1
Building thermal envelope
 REVISED
 Sealing methods and requirements
changed from 2009 IECC.
2012 IECC Update
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191
R402.4.1.1 Installation
 NEW
 The components of the building thermal
envelope shall be installed in accordance
with the manufacturer instructions.
 Where required by the code official, an
approved third party must inspect all
components and verify code compliance.
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192
R402.4.1.2 Testing
 REVISED
At 50 Pa:
 5 Air changes per hour (ACH) Climate
Zones 1 and 2.
 3 ACH in Climate Zones 3 through 8.
2012 IECC Update
Handout page 18
193
R402.4.2 Fireplaces
 REVISED
 New wood-burning
fireplaces shall have
tight-fitting flue
dampers and outdoor
combustion air. Also,
they must have
gasketed doors as
shown in Table
R402.4.1.1.
2012 IECC Update
Handout page 18
194
R402.4.4 Recessed lighting
 REVISED
 No change other than
listing testing after air
leakage rate for
recessed luminaires.
2012 IECC Update
Handout page 18
195
R403 Systems
 REVISED
1. Duct sealing options expanded.
2. Tested leakage reduced to 4cfm (113.3
L/min) per 100 square feet (9.29 m2).
3. Piping insulation requirements have
changed.
4. Ventilation fan efficiency.
5. Pools and inground spas.
2012 IECC Update
Handout page 18
196
R403.2.2 Sealing
 REVISED
 Eliminated building cavities used as ducts
shall be sealed.
 Testing requirements changed and
exceptions were added.
2012 IECC Update
Handout page 18
197
R403.2.2.1
Sealed air handler
 NEW
 Air handlers shall have a manufacturer’s
designation for an air leakage of no more
than 2 percent of the design airflow rate
when tested.
2012 IECC Update
Handout page 18
198
R403.2.3 Building cavities
 REVISED
 Building framing cavities shall not be used
as ducts or plenums.
 This differs from 2009 IECC that stated
building framing cavities shall not be used
as supply ducts.
2012 IECC Update
Handout page 18
199
R403.3.1
Protection of piping insulation
 NEW
 Piping insulation requirements
 Exposed to weather shall be protected from
damage
 Adhesive tape shall not be permitted.
2012 IECC Update
Handout page 18
200
R403.4
Service hot water systems
 REVISED
 Hot water systems shall be in accordance
with Section R403.4.1, Circulating hot
water systems (Mandatory), and Section
R403.4.2, Hot water pipe insulation
(Prescriptive).
 Note, in the 2009 IECC the title of this
section was Circulating hot water systems.
2012 IECC Update
Handout page 18
201
R403.4.1
Circulating hot water systems
 REVISED
 Eliminated insulating circulating service
hot water piping with Group R-2.
2012 IECC Update
Handout page 18
202
R403.4.2
Hot water pipe insulation
 NEW
 All hot water pipe,
minimum R-3.
Thermal resistance
for piping listed as 1
through 9 in the code.
2012 IECC Update
Handout page 18
203
Table R403.4.2
Maximum Run Length
 NEW
 Maximum run length for piping 3/8 inch
(9.5 mm) to greater than 3/4 inch (19.1
mm) for all piping from the distribution
manifold or the recirculation loop to a point
of use.
2012 IECC Update
Handout page 18
204
R403.5 Mechanical ventilation
 REVISED
 Ventilation must meet
the International
Residential Code or
International
Mechanical Code, or
other means
applicable.
2012 IECC Update
Handout page 18
205
R403.5.1 Whole-house mechanical
ventilation system fan efficacy
 NEW
 Introduces “whole-house mechanical
ventilation.”
2012 IECC Update
Handout page 18
206
TABLE R403.5.1 MECHANICAL
VENTILATION SYSTEM FAN EFFICACY
FAN
LOCATION
AIR FLOW
RATE
MINIMUM
(CFM)
MINIMUM
EFFICACY
(CFM/WATT)
AIR FLOW
RATE
MAXIMUM
(CFM)
Range hoods
Any
2.8 cfm/watt
Any
In-line fan
Any
2.8 cfm/watt
Any
Bathroom,
utility room
10
1.4 cfm/watt
< 90
Bathroom,
utility room
90
2.8 cfm/watt
Any
2012 IECC Update
Handout page 18
207
Section R403.6
Equipment sizing (Mandatory)
 REVISED
 Removes reference to IRC for duct-sealing
and sizing of systems.
 Updated reference to heating and cooling
equipment sizing in accordance with
 ACCA Manual S-10, Residential Equipment
Selection.
 ACCA Manual J-11, Residential Load
Calculations, 8th edition.
2012 IECC Update
Handout page 18
208
R403.9 Pools and in ground
permanently installed spas
 REVISED
 Heater, time switch
and cover
requirements for
pools and in ground,
permanently installed
spas.
2012 IECC Update
Handout page 18
209
R404 Electrical Power and
Lighting Systems
 REVISED
 75 percent of the total lamps shall be high
efficacy lamps.
 Fuel Gas Lighting
2012 IECC Update
Handout page 18
210
R404.1.1 Lighting equipment
 NEW
 Fuel gas lighting systems shall not have
continuously burning pilot lights.
2012 IECC Update
Handout page 19
211
R405 Stimulated Performance
Alternative
 REVISED
 Process Is virtually unchangedperformance is improved.
2012 IECC Update
Handout page 19
212
Table R405.5.2(1) Specifications for the
Standard Reference and Proposed Designs
 REVISED
 Glazing, air exchange rate, heating systems and
cooling systems standard reference design and
proposed design have been revised. For the
thermal distribution systems the standard
reference design was eliminated and the
proposed design was revised.
 Footnotes revised. Footnote c added that where
required by the code official testing shall be
conducted by an approved party.
2012 IECC Update
Handout page 19
213
Table R405.5.2(1) Specifications for the
Standard Reference and Proposed Designs
 REVISED
 Footnote d had the leakage area and reference to
ASHRAE 119 eliminated. Instead hourly calculations
as specified in the ASHRAE Handbook of
Fundamentals or equivalent shall be used to
determine the energy loads resulting from infiltration.
 Also, footnote h was revised as follows: For a
proposed design without a proposed cooling
system, a heating system with a prevailing federal
minimum efficiency shall be assumed for both the
standard reference design and proposed design.
2012 IECC Update
Handout page 19
214
R405.6.1 Minimum capabilities
 REVISED
 Item 2—The calculation of the wholebuilding sizing for the heating and cooling
equipment in the standard reference
design residence will be in accordance
with Section R403.6.
2012 IECC Update
Handout page 19
215
Chapter 4: Residential
Energy Efficiency
12.What are R-values for Climate Zones 2
and 3 for the ceiling?
R-30 to R-38.
2012 IECC Update
Handout page 22
216
Chapter 4: Residential
Energy Efficiency
Conditioned space
is an area orspace
room within
a building
13.Explain
conditioned
and
how itbeing
heated or cooled, containing uninsulated ducts, or with a fixed
affects
residential
and
commercial
opening directly into an adjacent conditioned space. For
buildings?
residential
buildings access doors from conditioned spaces to
unconditioned spaces shall be weatherstripped and insulated to a
level equivalent to the insulation on the surrounding surfaces (see
Section R402.2.4). All sunrooms enclosing conditioned space
shall meet the fenestration requirements of this code unless they
meet exceptions (see Section R402.3.5). For commercial
buildings the floor (see Section C402.2.5), duct and plenum
insulation and sealing (see Section C403.2.7) are affected if the
space is not conditioned.
2012 IECC Update
Handout page 22
217
Chapter 4: Residential
Energy Efficiency
14.Explain
the differences
between
service
Service
water-heating
is the supply
of hot water
for
hot water
systems
and
circulating
hot hot
purposes
other than
comfort
heating.
Circulating
waterwater
system
is when the distribution piping is heated
systems.
to maintain usage temperatures using pipe heating
cable, the system pump or heat trace cable that has
automatic or manual switches or controls that
can be set to optimize system operation or turn
off the system during periods of reduced demand.
2012 IECC Update
Handout page 22
218
Chapter 4: Residential
Energy Efficiency
15.What is the SHGC for windows in
Climate Zone 4?
40
2012 IECC Update
Handout page 22
219
Chapter 4: Residential
Energy Efficiency
16.Explain Section R405.6.1, Minimum
capabilities
Section
R405.6.1 Minimum capabilities.
Calculation procedures used to comply with
this section shall be software tools capable of
calculating the annual energy consumption of
all building elements that differ between the
standard reference design and the proposed
design.
2012 IECC Update
Handout page 22
220
2006 IECC® Fundamentals
225
Question and Answer
Segment
Call
(1-877-209-1336)
with your questions
229
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presentation.
230
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231
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2012 Template
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