Solutions for a Holistic Optimal Retrofit (SHOR) - 1980s urban end of terrace house
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as PDF The project takes a team based approach aiming to develop an integrated, technologically robust, people focussed approach to the retrofit.The house is owned by Charter Housing Association and was built in 1989. It is located within the city of Newport in South Wales and is an end of a terrace 2 storey house with a lounge, kitchen, two bedrooms, bathroom and a garden. Three adults live in the house. Energy savings have been made through modifications to the form and space, fabric and systems in order to achieve 80% carbon reductions required. The works were undertaken during the summer of 2010 and the tenants remained in situ.
Retrofit for the future ZA439S
Solutions for a Holistic Optimal Retrofit (SHOR) - 1980s urban end of terrace house : Project images
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Energy and fuel use
Measured data from renewable generation is not yet available.
Fuel use
| Pre-development | Forecast | Measured | |
| Electricity use | 1505 kWh/yr | 2583 kWh/yr | - |
|---|---|---|---|
| Natural gas use | 28020 kWh/yr | 454 kWh/yr | - |
| Oil use | - | - | - |
| LPG use | - | - | - |
| Wood use | - | - | - |
| Other Fuel | - | - | - |
| Pre-development | Forecast | Measured | |
| Primary energy requirement | 620 kWh/m².yr | 120 kWh/m².yr | - |
|---|---|---|---|
| Annual CO₂ emissions | 115 kg CO₂/m².yr | 28 kg CO₂/m².yr | - |
| Annual space heat demand | - | 59 kWh/m².yr | - |
Renewable energy
| Electricity generation | Forecast | Measured |
|---|---|---|
| Photovoltaics | 774 kWh/yr | - |
| Other Renewables Tech | - | - |
| Electricity consumed by generation | - | - |
| Primary energy requirement offset by renewable generation | 87 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 targets | - |
| Forecast heating load | - |
Airtightness
| Date | Result | |
| Pre-development air permeability test | - | 9.68m³/m².hr @ 50 Pascals |
|---|---|---|
| Final air permeability test | - | 7.73m³/m².hr @ 50 Pascals |
Project description
| Stage | Occupied |
|---|---|
| Start date | 14 June 2010 |
| Occupation date | 12 November 2010 |
| Location | Newport Newport Wales |
| Build type | Refurbishment |
| Building sector | Public Residential |
| Property type | End Terrace |
| Construction type | Masonry Cavity |
| Other construction type | Originally un-insulated |
| Party wall construction | Masonry Block |
| Floor area | 58 m² |
| Floor area calculation method | Actual Floor Area (SAP) |
| Building certification |
Project Team
| Organisation | Charter Housing Association Ltd |
|---|---|
| Project lead person | Charter Housing |
| Landlord or Client | Charter Housing |
| Architect | Welsh School of Architecture |
| Mechanical & electrical consultant | Micaul Solar, C W Electrical |
| Energy consultant | Welsh School of Architecture |
| Structural engineer | Eugene Travers Jones |
| Quantity surveyor | |
| Consultant | Vintage Joinery, Welsh School of Architecture |
| Contractor | Charter Building Maintenance |
Design strategies
| Planned occupancy | Three adults in all day. |
|---|---|
| Space heating strategy | Ground to water heat pump using radiators with evacuated tube collectors mounted on building which feed into unvented cylinder with solar coil. |
| Water heating strategy | Ground to water heat pump using radiators with evacuated tube collectors mounted on building which feed into unvented cylinder with solar coil. |
| Fuel strategy | Gas and electric from grid. Renewable energy from GSHP, solar thermal and PVs. |
| Renewable energy strategy | 2.1kW Photovoltaic panels. |
| Passive Solar strategy | Single storey solar extension to rear of property. 2m2 solar thermal. |
| Space cooling strategy | None. |
| Daylighting strategy | Extension has a rooflight and glazed bi-folding door positioned to maximise daylighting and views to the sky from the existing lounge. |
| Ventilation strategy | Positive input ventilation. |
| Airtightness strategy | Robust detailing and new triple-glazed, double-sealed doors and windows. |
| Strategy for minimising thermal bridges | Internal dry lining returned at opening reveals. |
| Modelling strategy | Builddesk Energy Design 3.4 SAP extension for whole house. |
| Insulation strategy | Internal dry lining incorporated with built in storage in bedrooms, triple glazed windows and doors. Maximising roof insulation. |
| Other relevant retrofit strategies | Lack of amenity and living and storage space has been addressed through the retrofit. |
| Contextual information | The property was purchased from the private sector in 1980s and is below space standards for social housing. |
Building services
| Occupancy | The house will be accoupied by three adults. |
|---|---|
| Space heating | A ground source heat pump will provide the space heating, this will use a ground loop in a 80 metre bore hole. |
| Hot water | A solar thermal panel on the extension will proved the bulk of the heat for the hot water, the ground source heat pump will provide a backup to this if required.. |
| Ventilation | A mechanical heat recovery system will be installed in the loft, this will extracts stale warm air through vents from wet rooms (kitchens, bathrooms etc) and takes it to the ventilation appliance to be exhausted outside. fresh filtered air from outside and supplies it through vents into the habitable rooms of your home (bedrooms, rooms, studies, living rooms). |
| Controls | The occupants will be give guidance on the use of the new systems to ensure the control systems are easy to use, |
| Cooking | The existing electric appliance will be replaced by a gas cooker. |
| Lighting | Low energy light bulbs will be fitted throughout the house. |
| Appliances | |
| Renewable energy generation system | A 2KWhp Photovoltaic panel will be fitted to the roof at the front of the house. |
| Strategy for minimising thermal bridges |
Building construction
| Storeys | 2 |
|---|---|
| Volume | 135m³ |
| Thermal fabric area | 130 m² |
| Roof description | |
| Roof U-value | 0.00 W/m² K |
| Walls description | |
| Walls U-value | 0.00 W/m² K |
| Party walls description | |
| Party walls U-value | 0.00 W/m² K |
| Floor description | |
| Floor U-value | 0.68 W/m² K |
| Glazed doors description | |
| Glazed doors U-value | 0.00 W/m² K installed |
| Opaque doors description | |
| Opaque doors U-value | 0.00 W/m² K installed |
| Windows description | |
| Windows U-value | 0.00 W/m² K - |
| Windows energy transmittance (G-value) | - |
| Windows light transmittance | 100% |
| Rooflights description | |
| Rooflights light transmittance | - |
| Rooflights U-value | 0.00 W/m² K |