Bringing Wates homes into the Future
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as PDF Wates property structural and low energy refurbishment based on an optimised structural insulated render consisting of a steel cage filled with insulation (Structherm). The void created allows for plumbing and ventilation ducting to provide heat recovery air heating and vent control throughout the house from a heat exchange unit located in the roof space. Other features include air source heat pump supplemented by solar and PV cells, triple glazed windows and doors with reveal detail to improve sealing and solar gain, weather compensating energy controls and a broadband based monitoring system to enable point of use metering information. A porch to reduce energy loss from front door and veranda at the rear for washing to reduce energy...
Retrofit for the future ZA493T
Bringing Wates homes into the Future : 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 | 10669 kWh/yr | 11310 kWh/yr | 4049 kWh/yr |
|---|---|---|---|
| Natural gas use | 22565 kWh/yr | - | 7004 kWh/yr |
| Oil use | - | - | - |
| LPG use | - | - | - |
| Wood use | - | - | - |
| 7 hour tariff (off peak) | - | - | - |
| Pre-development | Forecast | Measured | |
| Primary energy requirement | 702 kWh/m².yr | 377 kWh/m².yr | 242 kWh/m².yr |
|---|---|---|---|
| Annual CO₂ emissions | 146 kg CO₂/m².yr | 89 kg CO₂/m².yr | 51 kg CO₂/m².yr |
| Annual space heat demand | - | 67 kWh/m².yr | - |
Renewable energy
| Electricity generation | Forecast | Measured |
|---|---|---|
| Photovoltaic | 147 kWh/yr | - |
| none | - | - |
| Electricity consumed by generation | - | - |
| Primary energy requirement offset by renewable generation | 372 kWh/m².yr | 242 kWh/m².yr |
| Annual CO₂ emissions offset by renewable generation | 88 kg CO₂/m².yr | 51 kg CO₂/m².yr |
Calculation and targets
| Whole house energy calculation method | SAP |
|---|---|
| Other whole house calculation method | SAP extention worksheet |
| Energy target | Retrofit for the Future |
| Other energy targets | Whole House Primary Energy Demand 130kWh/m2/yr Primary areas of additional energy reduction; 1. Water Heating 2. Lighting 3. Appliances |
| Forecast heating load | 67 W/m² demand |
Airtightness
| Date | Result | |
| Pre-development air permeability test | - | 11.9m³/m².hr @ 50 Pascals |
|---|---|---|
| Final air permeability test | - | 11.1m³/m².hr @ 50 Pascals |
Project description
| Stage | Under construction |
|---|---|
| Start date | 05 July 2010 |
| Occupation date | 25 September 2010 |
| Location | Birmingham West Midlands England |
| Build type | Refurbishment |
| Building sector | Public Residential |
| Property type | End Terrace |
| Construction type | Concrete frame |
| Other construction type | none |
| Party wall construction | blockwork |
| Floor area | 75 m² |
| Floor area calculation method | Treated Floor Area (PHPP) |
| Building certification |
Project Team
| Organisation | G F Tomlinson Group Limited |
|---|---|
| Project lead person | G F Tomlinson Group Ltd - Les Needham |
| Landlord or Client | Birmingham City Council - Steve Walker |
| Architect | Pick Everard, Derby - Jerry Tseng |
| Mechanical & electrical consultant | SPI Ltd, Burntwood, Staffs (part of NPower) - Paul Dillon |
| Energy consultant | Hadley Brook Enerprises Ltd, Coventry - Dermott McLaughlin |
| Structural engineer | Structherm Building Systems Ltd, Holmfirth - Julian Taylor |
| Quantity surveyor | G F Tomlinson Birmingham Ltd - Karen Ford |
| Consultant | Loughborough University - Paul Rowley, Bowater, Worcester Bosch |
| Contractor | G F Tomlinson Birmingham Ltd - Pat Daly |
Design strategies
| Planned occupancy | Existing family home. Design enables uninterrupted occupancy. Energy performance improvements is in the main achieved externally |
|---|---|
| Space heating strategy | Heat recovery unit located within the roof space with distribution ducting within the external insulated void with supply and exhaust to each room. This will enable well sealed, controllable heating and ventilation to all spaces. Further more it omits the need for a wet pipework distribution system and the inadequacy and space loss of radiators. |
| Water heating strategy | Roof or porch mounted Solar thermal panels, appropriate to building orientation. Lower mounting improves maintenance access. Point of use heating and energy display will also improve user appreciation and practice. |
| Fuel strategy | Due to the long term nature of the proposals it is envisaged that electricity is the likely fuel most likely being generated from available primary fuel sources. Renewable fuel sources being developed Hydrogen fuel cells, pv, wind, wave and nuclear power all produce electricity. |
| Renewable energy strategy | Integration of solar thermal and PV within the roof construction where appropriate. The recent trade in tariffs now make these potentially viable contributors to renewable energy to the house holder. |
| Passive Solar strategy | See notes regarding renewable energy from solar sources. This project does not seek to add elements such as trombe wall techniques to the design as they a re less fail safe. High insulation was considered to be of the greater benefit for the widest range of property |
| Space cooling strategy | None envisaged due to slower thermal response and higher insulation standards |
| Daylighting strategy | Replacement high performance window and special reveal design creates sealable stepped junctions with splayed design to retain views and light. |
| Ventilation strategy | Airtightness by sealed external skin and controlled ventilation and air distribution by heat recovery unit |
| Airtightness strategy | Interlocking external insulation enhanced by seals, membranes and external rendered finish. |
| Strategy for minimising thermal bridges | Fully thermally broken components for windows, doors and reveals, minimising fixings to thermally broken external insulation subframe. |
| Modelling strategy | None at present, it is considered that the prototype ( if granted) will enable detailed examination of the minutia for maximum performance |
| Insulation strategy | High performance external insulation on proprietary top hat subframe supported from existing building shell. No foundation required. There is almost no limit to amount of insulation usable to achieve required standards. The solution also retains the thermal mass characteristics of existing concrete wall panels. |
| Other relevant retrofit strategies | Conscious that the devil is in the detail, the team has sought ways throughout to ensure stepped sealing details for air tightness and longevity in the finished construction Over and above primary building performance, It is also felt that a crucial element in design is the availability of point of use information for the user to encourage an understanding of the significance and cost of individual actions. |
| Contextual information | The project seeks to utilise presently tested and developed products so that development time is reduced. This will to enable an early execution of the solution. The innovation is in design approach to integrate the known products into a coherent whole. The solutions have also been scrutinised by G F Tomlinson (the builder partner) to ensure viable building costs and practice. Project partners include: Birmingham City Council, G F Tomlinson Building, Pick Everard architects, Pick Everard BREEAM assessors, N Power, Hanson Structherm, Worcester Bosch, Bowater window systems, Loughborough University CREST |
Building services
| Occupancy | NULL |
|---|---|
| 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 |
Building construction
| Storeys | |
|---|---|
| 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 |