2050 Now! Achieving the standards for 2050, and the potential role for innovative heating solutions in thermally improved homes

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The project will be improving four homes to different levels and exploring the performance of new heating solutions to achieve the optimum balance of energy performance vs. heating input for these different technologies. The three main innovative heating technologies in this project are Baxi's Ecogen domestic CHP (dCHP), Baxi's Ambiflo ASHP and Nuaire's Sunwarm (combined positive input ventilation, solar thermal heating and solar hot water). The dCHP units will be installed in relatively worse performing households and the ASHP units in well insulated houses to understand the level of performance needed from homes to create the right environment for these technologies to achieve significant carbon savings.

Retrofit for the future ZA556B
Images Graphs Figures Description Strategies Building

2050 Now! Achieving the standards for 2050, and the potential role for innovative heating solutions in thermally improved homes : Project images

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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 17487 kWh/yr 3717 kWh/yr -
Natural gas use964 kWh/yr 482 kWh/yr -
Oil use- - -
LPG use- - -
Wood use- - -
house coal 10035 kWh/yr - -
Primary energy requirement 683 kWh/m².yr 121 kWh/m².yr -
Annual CO₂ emissions 176 kg CO₂/m².yr 28 kg CO₂/m².yr -
Annual space heat demand - 64 kWh/m².yr -

Renewable energy

Electricity generationForecastMeasured
PV1595.199951 kWh/yr -
Other Renewables Tech--
Electricity consumed by generation --
Primary energy requirement
offset by renewable generation
72 kWh/m².yr -
Annual CO₂ emissions
offset by renewable generation
16 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 targets-
Forecast heating load -


Pre-development air permeability test--
Final air permeability test--

Project description

StageUnder construction
Start date01 March 2010
Occupation date31 May 2010
Location Newark Nottinghamshire  England
Build typeRefurbishment
Building sectorPublic Residential
Property typeSemi-Detached
Construction typeMasonry Cavity
Other construction type
Party wall construction
Floor area 81.4
Floor area calculation method Treated Floor Area (PHPP)
Building certification

Project Team

OrganisationNottingham Community Housing Association
Project lead personNottingham Community Housing Association
Landlord or ClientNottingham Community Housing Association
Mechanical & electrical consultant
Energy consultantCamco
Structural engineer
Quantity surveyor
ConsultantParity Projects
ContractorBaxi, Nuaire, NCHA's own contractors

Design strategies

Planned occupancyThree people
Space heating strategyAir source heat pump with radiators will be installed in the main house with advanced measures (2050 house) and another property with medium measures. The two other houses will be installed dCHP units. On the superhouse, Sunwarm will also be contributing to space heating.
Water heating strategyWater heating will be provided by the Sunwarm system, feeding hot water to the house through the solar panels.
Fuel strategyMains Electricity for properties with ASHP and Mains Gas for the properties with dCHP.
Renewable energy strategy2 kWP PV panels to be installed in the 2050 house in the south facing roofs.
Passive Solar strategyThe properties have south facing windows. In addition, the superhouse with the Sunwarm system will be collecting heat from the solar panels on the roof.
Space cooling strategyNatural ventilation in all properties and Sunwarm in the super house supplying continuous filtered fresh air during day. On warm nights SUNWARM will either supply air in a similar way to a warm day or if more advantageous will pass the outside air through the solar collectors providing low energy air cooling to the property.
Daylighting strategyLarge windows
Ventilation strategySunwarm will be providing ventilation throughout the year. Natural ventilation can also be used during summer.
Airtightness strategy Reducing air-tightness down to 3. Experience from other projects shows that this is achievable. The pressure tests will be run in conjunction with the measures to ensure that the target figure is achieved.
Strategy for minimising thermal bridges All junctions will be assessed during internal wall insulation.
Modelling strategyNHER SAP software was used to model the different measures through collaborating with suppliers and feeding in information to the software regarding the performance of the different measures. The unregulated emissions were modelled through the SAP extension worksheet provided by TSB.
Insulation strategy- Application of solid wall insulation (Spacetherm) to achieve u-value of 0.24. - Loft insulation (u-value: 0.13) - Solid floor insulation (u-value: 0.4)
Other relevant retrofit strategiesThe planned measures will be installed whilst the properties are void and in a particular sequence to avoid to additional costs.
Contextual information

Building services

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

Building construction

Storeys 0
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