Inspiration Birmingham 2020

download as PDF
as PDF
The project will inspire and inform retrofitting of mainstream urban social housing by creating a high quality exemplar of a common housing type. It will involve retrofitting a typical central Birmingham Victorian terrace (4 bedroom, attic conversion, on the gas grid) with a whole house package of energy saving measures. The technologies we intend to use are mostly proven and well established in the UK that can be installed using local building and heating contractors. We will be looking to replicate the successful outcomes of the project into the proposed Birmingham Green New Deal (a project that aims to retrofit 5,000 properties across the city).

Retrofit for the future ZA349C
Images Graphs Figures Description Strategies Building

Inspiration Birmingham 2020 : Project images

Click on image to preview full size

Inspiration Bham_2020_Back.jpg
CO2 emissionsPrimary energy requirement
Energy target
Retrofit for the Future

Energy and fuel use

Fuel use by type
Primary energy requirement
CO2 emissions

Measured data from renewable generation is not yet available.

Fuel use

Electricity use 3151 kWh/yr 1385 kWh/yr -
Natural gas use63241 kWh/yr 11622 kWh/yr -
Oil use- - -
LPG use- - -
Wood use- 1463 kWh/yr -
Other Fuel - - -
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 -

Renewable energy

Electricity generationForecastMeasured
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 -

Calculation and targets

Whole house energy calculation method SAP
Other whole house calculation method-
Energy target Retrofit for the Future
Other energy targetsWhole House Primary Energy Demand 119 kWh/m2/yr Overall CO2 Target 18 kg/m2/yr
Forecast heating load -


Pre-development air permeability test-15.5m³/m².hr @ 50 Pascals
Final air permeability test-6.81m³/m².hr @ 50 Pascals

Project description

StageUnder construction
Start date03 May 2010
Occupation date30 September 2010
Location Birmingham West Midlands  England
Build typeRefurbishment
Building sectorPublic Residential
Property typeMid Terrace
Construction typeSolid Brick
Other construction typeUninsulated 250mm solid brick
Party wall constructionUninsulated 250mm solid brick
Floor area 159
Floor area calculation method Treated Floor Area (PHPP)
Building certification

Project Team

OrganisationBalsall Heath Housing Co-operative Ltd
Project lead personEncraft Ltd
Landlord or ClientBalsall Heath Housing Co-operative
ArchitectChapman Design
Mechanical & electrical consultant
Energy consultantEncraft Ltd
Structural engineer
Quantity surveyorBirmingham Co-operative Housing Services
ContractorLogmoor, New World Solar, Wattbox, Transcast

Design strategies

Planned occupancyThe 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.
Space heating strategyThe 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 strategyThe 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 strategyMains gas and mains electricity. A pellet room heater will supply secondary heating.
Renewable energy strategyNot specified.
Passive Solar strategyThe front of the property is south west facing.
Space cooling strategyNatural ventilation.
Daylighting strategyRoof 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 strategySummer 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 strategyWhole 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 strategiesThe 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 informationTo 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.

Building services

Space heatingNULL
Hot waterNULL
Renewable energy generation systemNULL
Strategy for minimising thermal bridgesNULL

Building construction

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