Energy in Your Home Jake Mathias Private Sector Housing Manager, - - PowerPoint PPT Presentation

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Energy in Your Home Jake Mathias Private Sector Housing Manager, - - PowerPoint PPT Presentation

Sep 21, 2023 420 likes •845 views

Energy in Your Home Jake Mathias Private Sector Housing Manager, Housing Department, Westminster Council Energy in Your Home Westminster Profile 115,000 Homes Average home in London = 5.3 tonnes of Carbon Social Housing - 29%

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Energy in Your Home Jake Mathias – Private Sector Housing Manager, Housing Department, Westminster Council

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Energy in Your Home

Westminster Profile

  • 115,000 Homes
  • Average home in London = 5.3 tonnes of Carbon
  • Social Housing - 29%
  • Private Renting - 36%
  • 55 Conservation Areas
  • 90% of dwellings are flats
  • 63% of private dwellings built pre 1919
  • At least 63% of dwellings have solid walls
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Energy in Your Home

Energy Efficiency: Easy Measures

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Energy in Your Home

  • Turn your thermostat down by 1 C
  • can reduce heating bills by approx 10%
  • use your programmer to turn on heating when

needed

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Energy in Your Home

  • Only boil as much water as you need
  • but remember to cover the elements if you're using

an electric kettle

  • Eco kettle – EST recommended
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Energy in Your Home

  • Turn appliances off at the wall when not in use
  • cut electricity to all selected appliances using one

switch - Bye Bye Standby

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Energy in Your Home

  • Use energy efficient light bulbs
  • last up to 10 times longer than normal bulbs
  • use up to 80% less electricity than a normal bulb
  • Government phasing out normal bulbs by 2012
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Energy in Your Home

  • Install Energy / Smart Meters
  • Energy meter – shows energy

used by different appliances

  • Smart meter – two-way

communication system, displays real-time energy use

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Energy in Your Home

  • Buy energy efficient appliances
  • Energy Saving recommended fridges use up to 60%

less electricity

  • Energy Saving recommended dishwashers use up to

20% less electricity and less water

  • Integrated Digital TV
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Energy in your Home

  • Install a hot water tank jacket

Hot water Tank Jacket DIY Cost £12 Annual Saving £35 DIY Payback under 6 months Annual CO2 savings 190kgs

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Energy in Your Home

  • Install Curtains and Shutters
  • Draw curtains at dusk to keep the

heat in

  • Shutters reduce heat loss and

provide privacy

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Energy in Your Home

  • Install low flow Shower heads
  • aerated shower heads
  • non-aerated shower head
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Energy in Your Home

  • Install a chimney

balloon

  • Stops chimney

draughts

  • Reduces heat loss
  • Reduces noise
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Energy in Your Home

  • Maintenance
  • Bleed radiators and power flush the system
  • Service the boiler
  • Defrost the freezer
  • Sealing gaps in floorboards
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Energy in Your Home

Energy Efficiency: Major Measures

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35% WALLS 15% DRAUGHTS 25% ROOF 10% WINDOWS 15% FLOOR

Energy in Your Home

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Energy in Your Home

Heating System

Condensing boiler upgrade (G rated to A rated) Installed cost £2,000 Annual saving £235 Payback Period 9 years Annual CO2 savings 1,300kg

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Energy in Your Home

Draught Proofing

Draught Proofing Installed Cost £200 Annual Saving £25 Payback period 8 years Annual CO2 savings 130kg

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Energy in Your Home

Loft Insulation

Loft Insulation top-up from 0 to 270mm Installed cost £300 Annual saving £150 Payback Period 2 years Annual CO2 savings 620kg

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Energy in Your Home

Wall Insulation

Internal Solid Wall Insulation Material cost £35/m2 - £100/m2 Annual saving £380 Annual CO2 saving 2 tonnes

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Energy in Your Home

Wall Insulation

Cavity Wall Insulation Installed cost £415 Annual saving £145 Payback Period 3 years Annual CO2 saving 600kg

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Energy in Your Home

Double Glazing

Sash Window Double Glazing Installed cost £8,000? Annual saving £135 Payback Period 59 years Annual CO2 saving 720kg

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Energy in Your Home

Secondary Glazing

Secondary Glazing DIY Installed cost £2,000 Annual saving £50 Payback Period 40 years Annual CO2 saving 140kg

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Energy in Your Home

  • Solar Thermal – provides

hot water

  • Solar PV – provides

electricity

  • Wind turbine – provides

electricity

  • Biomass – provides

heating

  • Heat Pumps – provides

heating

Renewable Energy

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“Retrofit & Replicate”

  • exemplar terraced house refurbishment
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  • Government had am 80% reduction CO2,

based on a ‘whole house’ approach

  • Energy breakdown for dwellings

− 61% space heating − 23% hot water − 13% lighting and appliances − 3% cooking

  • The priorities are:

− to minimise heat losses from the building fabric; − to install an easily replicable, efficient form of space and water heating; − to reduce the energy requirements for lighting; − to utilise the most appropriate renewable forms of micro-generation

Case study

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The Proposals

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Insulation

  • Kingspan Kooltherm phenolic

foam lining boards

  • Web Dynamics TLX Gold

breathable multifoil – world’s first application

  • Kingspan Thermapitch

polyurethane

  • U value = 0.15 W/m²K walls
  • U value = 0.10 W/m²K roof
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Windows and Doors

  • Nordan NTech Passive

windows – triple-glazed, – frame insulated

  • U value = 0.7 W/m²K !
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MV Heat Recovery

Vaillant recoVAIR 275

  • 85% efficient heat

recovery

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Lighting

  • 100% LED fittings
  • GreenLED 3.7w

‘Antares’ GU10

  • 180W for whole

house

  • 50,000 hrs lifespan =

20 years before replacement

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Solar Thermal Collectors

Dual east/west-facing panels giving combined area of 3.68m2

  • Controls intelligently favour

the better performing panel

  • Generates 1240 kWh heat per

year, around 70% of annual need

  • Heat stored in 250 litre Range

twin coil thermal store, located directly beneath panels

  • Backed up by conventional

condensing gas boiler

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Solar Photovoltaics

  • 8 x 170w polycrystalline panels

(10m2) located on extension flat roof

  • Supplied and installed by Solar

Technologies under British Gas framework with 50% grant funding anticipated from LCBP

  • Tilted due south at 5 deg pitch,

generating 1088 kWh/yr (618 kgCO2/yr offset)

  • Low profile installation to

remove impact on neighbours and planning considerations

  • 1no. inverter located in meter

cupboard, cable penetrates roof via local upstand

  • Installed cost to client - £4460

(with grant) = £446/m2 or £3280/kWp

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Achieving the Target

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Achieving the Target

Fabric insulation - £8900 or £4.38/kgCO2/yr saved Triple-glazed windows/doors - £9640 or £21.34/kgCO2/yr saved Condensing boiler/central heating - £5000 or £3.16/kgCO2/yr saved MVHR/airtight measures /testing - £3200 or £2.83/kgCO2/yr saved Solar collectors and storage - £5300 or £7.49/kgCO2/yr saved Replacement LED Lighting - £2505 or £8.32/kgCO2/yr saved Photovoltaics - £4950 (with 50% LCBP grant) or £9.39/kgCO2/yr saved Total - £39,495 or £6.10/kgCO2/yr saved Average tenant fuel bill reduced by over £600/yr

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The completed project

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The completed project

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The completed project

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The completed project

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The completed project

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The completed project