Measured data from renewable generation is not yet available.
Pre-development | Forecast | Measured | |
Electricity use | 3151 kWh/yr | 1385 kWh/yr | - |
---|---|---|---|
Natural gas use | 63241 kWh/yr | 11622 kWh/yr | - |
Oil use | - | - | - |
LPG use | - | - | - |
Wood use | - | 1463 kWh/yr | - |
Other Fuel | - | - | - |
Pre-development | Forecast | Measured | |
Primary energy requirement | 507 kWh/m².yr | 116 kWh/m².yr | - |
---|---|---|---|
Annual CO₂ emissions | 94 kg CO₂/m².yr | 20 kg CO₂/m².yr | - |
Annual space heat demand | - | 33.5 kWh/m².yr | - |
Electricity generation | Forecast | Measured |
---|---|---|
Renewables Technology | - | - |
Other Renewables Tech | - | - |
Electricity consumed by generation | - | - |
Primary energy requirement offset by renewable generation | 116 kWh/m².yr | - |
Annual CO₂ emissions offset by renewable generation | 20 kg CO₂/m².yr | - |
Whole house energy calculation method | SAP |
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Other whole house calculation method | - |
Energy target | Retrofit for the Future |
Other energy targets | Whole House Primary Energy Demand 119 kWh/m2/yr Overall CO2 Target 18 kg/m2/yr |
Forecast heating load | - |
Date | Result | |
Pre-development air permeability test | - | 15.5m³/m².hr @ 50 Pascals |
---|---|---|
Final air permeability test | - | 6.81m³/m².hr @ 50 Pascals |
Stage | Under construction |
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Start date | 03 May 2010 |
Occupation date | 30 September 2010 |
Location | Birmingham West Midlands England |
Build type | Refurbishment |
Building sector | Public Residential |
Property type | Mid Terrace |
Construction type | Solid Brick |
Other construction type | Uninsulated 250mm solid brick |
Party wall construction | Uninsulated 250mm solid brick |
Floor area | 159 m² |
Floor area calculation method | Treated Floor Area (PHPP) |
Building certification |
Organisation | Balsall Heath Housing Co-operative Ltd |
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Project lead person | Encraft Ltd |
Landlord or Client | Balsall Heath Housing Co-operative |
Architect | Chapman Design |
Mechanical & electrical consultant | |
Energy consultant | Encraft Ltd |
Structural engineer | |
Quantity surveyor | Birmingham Co-operative Housing Services |
Consultant | |
Contractor | Logmoor, New World Solar, Wattbox, Transcast |
Planned occupancy | The building will be occupied by three adults and one child. One of the adults is retired and therefore the house is occupied for long periods. |
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Space heating strategy | The existing gas back boiler will be removed and replaced with an A grade condensing combi gas boiler. All heating to be delivered using wall mounted radiators. Performance will be maximised by including a passive flue gas heat recovery unit. Secondary heating will be provided from a small wood pellet stove. |
Water heating strategy | The hot water supply will be via the gas condensing combination boiler together with a flat plate solar thermal system. There will be no electric immersion back-up. Aerated shower head and taps will be fitted to reduce hot water need. |
Fuel strategy | Mains gas and mains electricity. A pellet room heater will supply secondary heating. |
Renewable energy strategy | Not specified. |
Passive Solar strategy | The front of the property is south west facing. |
Space cooling strategy | Natural ventilation. |
Daylighting strategy | Roof windows in the attic and kitchen roof will ensure good levels of natural daylight in the top floor bedrooms and kitchen. The front of the property is south west facing and therefore daylighting levels will be good in the front lounge and master bedroom. |
Ventilation strategy | Summer cooling will be through openable windows. Wet areas will be ventilated with energy efficient humidistats controlled DC extract fans. |
Airtightness strategy | An air permeability of 5m3/h/m2 to be the target. Where drylining walls will be parge coated and all joints between boards will be sealed. Drylining to be continous between floors. Holes for services passing through external walls and suspended floors to be sealed. |
Strategy for minimising thermal bridges | Insulation will be returned into the reveals and sofits of openings and for areas dry lined insulation will be returned (approx 0.5m) along separating internal walls. External insulation added to the rear wall and kitchen extension. Insulation to be added to ground concrete floor and suspended floor. |
Modelling strategy | Whole house modelling was undertaken in SAP 2005. |
Insulation strategy | -Application of external insulation to the rear wall and kitchen extension (to achieve U value of 0.20 W/m2K) -Application of external insulation and dry lining to the side passage (to achieve U value of 0.20 W/m2K) -Dry line front wall (to achieve U v |
Other relevant retrofit strategies | The design will include a new to market product called VPhase for regulating the incoming electricity supply and a close to market control unit called Wattbox. The VPhase unit optimises the incoming voltage to a constant 220V giving householders immediate and significant energy savings. The Wattbox will monitor and learn residents occupancy and provide a uniquely simple interface for tenants. The innovative step is in monitoring house electrical consumption to learn occupancy from which, the controller anticipates and times space heating. Similarly, it monitors, learns, controls and optimises hot water heating so excess is avoided. It replaces the time clock and thermostat with simple buttons for more heat; or less heat. |
Contextual information | To meet the required targets for the property chosen has been particularly challenging. The house is a large 4 bed Victorian mid-terrace with a cellar and a 1980s kitchen extension and attic conversion (both poorly insulated). To retain the front brick facade external insulation was not possible. Insulating the long side passage also presented difficulties (mixture of external and internal). The gas and electricity meters will require moving to enable dry lining. The property is in a built up area and therefore opportunities to exploit onsite renewables are restricted. |
Occupancy | NULL |
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Space heating | NULL |
Hot water | NULL |
Ventilation | NULL |
Controls | NULL |
Cooking | NULL |
Lighting | NULL |
Appliances | NULL |
Renewable energy generation system | NULL |
Strategy for minimising thermal bridges | NULL |
Storeys | |
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Volume | - |
Thermal fabric area | - |
Roof description | NULL |
Roof U-value | 0.00 W/m² K |
Walls description | NULL |
Walls U-value | 0.00 W/m² K |
Party walls description | NULL |
Party walls U-value | 0.00 W/m² K |
Floor description | NULL |
Floor U-value | 0.00 W/m² K |
Glazed doors description | NULL |
Glazed doors U-value | 0.00 W/m² K - |
Opaque doors description | NULL |
Opaque doors U-value | 0.00 W/m² K - |
Windows description | NULL |
Windows U-value | 0.00 W/m² K - |
Windows energy transmittance (G-value) | - |
Windows light transmittance | - |
Rooflights description | NULL |
Rooflights light transmittance | - |
Rooflights U-value | 0.00 W/m² K |