Energy Efficiency of Housing, Noel Rice, NIHE

Report
NI Housing Executive
Energy Efficiency of Housing
Noel Rice
20th November 2013
Contents
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Energy Conservation Strategic Context
House Condition Survey 2011
NIHE Heating Policy
Current Projects
 Cavity Wall Insulation Research
 Solid Wall Insulation
 Solar PV Panels
 Renewable Pilot Projects
 Economic Benefits of Energy Efficiency
Energy Conservation Strategic
Context
 NIHE is Home Energy Conservation Authority
 Energy efficiency of housing improved by 22.4% since
1996 – All tenures
 Energy rating up from 41 to 60 (46 to 55 in England
over same period)
 Savings of 2.5m tonnes of CO2 pa
 However, fuel poverty has increased
 Fuel prices and income are factors
Heating Systems- All tenures
600000
1996
2011
500000
400000
300000
200000
100000
0
Gas
Oil
Coal
Electric
Dual
Others
Wall Insulation 2011- All tenures
Full Cavity
23%
Partial Cavity
5%
6%
Internal/External Ins
66%
No wall insulation (2/3 are
SOLID wall)
Cavity Wall Insulation
 Cavity wall insulation where appropriate
 Costs £450 - £500
 Savings – Up to £140pa
 Mineral Wool or Bonded Bead
 Quality Issues – Sufficient fibre at right pressure/density –
sufficient glue for beads
 Cavity should be at least 50mm wide
 Check external wall condition/exposure
 Current investigative research project ongoing
Loft Insulation 2011 – All tenures
2%
4%
13%
< 100mm
100-150mm
35%
>150mm
46%
Don’t Know
No loft insulation
Loft Insulation
 270mm of loft insulation
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Costs around £300
Savings (0-270mm) Up to £180pa
Savings (100mm to 270mm) £25pa
Ventilation and wiring issues
 Hot Water Tank – DIY Cost £15 – Savings £45pa
 Pipes – DIY Cost £10 – Savings £15pa
 Draught proofing with appropriate ventilation
* All figures from EST for 3 bedroom gas heated semi
Double Glazing 2011- All tenures
8%
Full Double
Glazed
12%
Partial Double
Glazed
80%
No Double
Glazing
NIHE Heating Policy
 Natural Gas where available
 Network may move West
 Outside gas area
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Oil Condensing Boiler or
Wood Pellet Boiler
Solid Fuel open fire (exceptional basis)
Secondary Sources
 Solid Fuel Open Fire (no boiler)
 Focal Point electric Fire
 Evaluate range of innovative alternative
Heating Costs – 3 bed semi
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House Coal
Oil Non-Condensing
Oil condensing
Gas Condensing (PNG)
Gas Non-Condensing
Gas Condensing (Firmus)
Wood Pellet Boiler
Economy 7
LPG Condensing
LPG Non-Condensing
Boiler upgrade from G to A can save
Annual Cost £
1318
1573
1287
1093
1327
1041
1055
1761
2020
2463
£300 pa
Gas Network
 Initially Greater Belfast 1996-2007
 Firmus Network; Newry, W’point, Banbridge, Armagh,
Craigavon, Antrim, Ballymena, Ballymoney, Coleraine,
Limavady and Derry
 Includes rural villages en route
 Gas to the West
 licence competition 2013/14
 NI Assembly committed £32.5m
 Includes towns of Dungannon, Coalisland, Cookstown,
Magherafelt, Omagh, Strabane, Enniskillen and Derrylin
Cavity Wall Insulation (CWI) Research
 Is there a problem with existing CWI?
 Possible problems maybe:
 Fibre insulation – e.g. has it settled?
 Bonded bead – e.g. sufficient glue?
 Insulation board – e.g. properly fitted?
CWI - Research
 NIHE – commissioned research on 300 dwellings
across NI
 Research being undertaken by SERC
 Provide evidence base for remedial programme, if
required
 Make recommendations & shape policy
CWI - Upgrade
Solid Wall Insulation
 120,000 solid wall houses in NI
 83,000 no insulation - mostly private
 Internal Wall Insulation £5.5k to £8.5k*
 Savings £445pa
 External Wall Insulation £9.5k - £13k*
 Savings £475pa
* Estimates from Energy Saving Trust based on heating a
gas fired semi-detached dwelling with 3 bedrooms
Coleraine Project – Work in Progress
Solar Photovoltaic (PV) Panels
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Generates electricity from daylight
Use it or lose it
Renewable Obligation Certificates
Export Tariff
Costs have reduced in recent years
3kWp system costs £6k- £7k
Income generation £490pa plus bill
Plus lower bills
Rent a Roof Schemes available
Maintenance
Solar PV Panels
Solar Thermal Panels
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Heat water using light from the sun
Property should be south facing
Flat plate and evacuated tube
Installed in 2,032 NIHE Homes – EREF fund
Saves around £60-£85 per year – depends on usage pattern
DETI Grant OF £320 under Renewable Heat Premium
Payment
 Average Cost £2.5 to £4k
 Maintenance – Anti-freeze, valves, hoses,…
*Figures from EST
Solar Thermal Panel
Wood Pellet Boiler
Average cost - £4K - £10K (Manually fed)
Grants - Renewable Heat Premium Payment £2,500
Renewable Energy
Heat Pumps
Ground Source Heat Pump
Average cost – £8k - £10K
Grants – Renewable Heat Premium
Payment £3,500
Air Source Heat Pump
Average cost - £6K
Grants – Renewable Heat Premium
Payment £1,700
See www.detini.gov.uk
Economic Benefits of Energy
Efficiency
 Lower fuel bills – increased disposable income for spend
on other things
 Less fuel debt and fuel poverty
 Reduced maintenance costs
 Increased value of home
 Greater warmth/comfort
 Less risk of ill health
 Energy programmes create jobs
 Minimises economic cost of damage to environment
Challenges
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Affordability of all fuels
Particular issue with budgeting for oil
Insulation for solid wall dwellings
Whole house approach
Funding required programmes
Income dimension of fuel poverty
Infrastructure improvements

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