NI Housing Executive Energy Efficiency of
HousingNoel Rice
20th November 2013
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
Contents
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
Energy Conservation Strategic Context
Heating Systems- All tenures
Gas Oil Coal Electric Dual Others0
100000
200000
300000
400000
500000
6000001996 2011
66%6%
5%
23% Full Cavity
Partial Cavity
Internal/External Ins
No wall insulation (2/3 are SOLID wall)
Wall Insulation 2011- All tenures
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
Cavity Wall Insulation
Loft Insulation 2011 – All tenures
13%
46%
35%
2%4%
< 100mm
100-150mm
>150mm
Don’t Know
No loft insu-lation
270mm of loft insulation 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
Loft Insulation
Double Glazing 2011- All tenures
80%
12%
8%Full Double Glazed
Partial Double GlazedNo Double Glazing
Natural Gas where available Network may move West Outside gas area
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
NIHE Heating Policy
Annual Cost £ House Coal 1318 Oil Non-Condensing 1573 Oil condensing 1287 Gas Condensing (PNG) 1093 Gas Non-Condensing 1327 Gas Condensing (Firmus) 1041 Wood Pellet Boiler 1055 Economy 7 1761 LPG Condensing 2020 LPG Non-Condensing 2463 Boiler upgrade from G to A can save £300 pa
Heating Costs – 3 bed semi
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
Gas Network
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?
Cavity Wall Insulation (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 - Research
CWI - Upgrade
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
Solid Wall Insulation
Coleraine Project – Work in Progress
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 Photovoltaic (PV) Panels
Solar PV Panels
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 Panels
Solar Thermal Panel
Wood Pellet Boiler
Average cost - £4K - £10K (Manually fed)Grants - Renewable Heat Premium Payment £2,500
Renewable EnergyHeat Pumps
Ground Source Heat PumpAverage cost – £8k - £10KGrants – Renewable Heat Premium Payment £3,500
Air Source Heat PumpAverage cost - £6KGrants – Renewable Heat Premium Payment £1,700See www.detini.gov.uk
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
Economic Benefits of Energy Efficiency
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
Challenges