Ilford, Essex - East Thames Group: Low carbon refurbishment of a typical London Victorian street property.
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as PDF This is a 4 bed end of terrace Victorian house, purchased by East Thames in 2007. Our approach to energy saving and CO2 reduction is to follow a lean-clean-green hierarchy: seeking to minimise heat losses from the property thermal fabric and ventilation method; to supply residual space and water heating using replicable, low carbon technology; to minimise lighting and appliance energy loads; and finally to consider micro-generation using proven, renewable energy systems. A further aspiration is to use materials derived from natural or renewable sources such as cellulose and woodfibre insulations, in order to protect the historic integrity of the existing construction through their inherent breathable and hygroscopic characteristics
Retrofit for the future ZA423M
Ilford, Essex - East Thames Group: Low carbon refurbishment of a typical London Victorian street property. : 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 | 2010 kWh/yr | 1074 kWh/yr | - |
|---|---|---|---|
| Natural gas use | 40107 kWh/yr | 5996 kWh/yr | - |
| Oil use | - | - | - |
| LPG use | - | - | - |
| Wood use | - | - | - |
| Other Fuel | - | - | - |
| Pre-development | Forecast | Measured | |
| Primary energy requirement | 666 kWh/m².yr | 125 kWh/m².yr | - |
|---|---|---|---|
| Annual CO₂ emissions | 123 kg CO₂/m².yr | 24 kg CO₂/m².yr | - |
| Annual space heat demand | - | 53 kWh/m².yr | - |
Renewable energy
| Electricity generation | Forecast | Measured |
|---|---|---|
| PV | 780 kWh/yr | - |
| Other Renewables Tech | - | - |
| Electricity consumed by generation | - | - |
| Primary energy requirement offset by renewable generation | 100 kWh/m².yr | - |
| Annual CO₂ emissions offset by renewable generation | 18 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 | - | 10.63m³/m².hr @ 50 Pascals |
|---|---|---|
| Final air permeability test | - | 3.79m³/m².hr @ 50 Pascals |
Project description
| Stage | Under construction |
|---|---|
| Start date | 01 March 2010 |
| Occupation date | 27 June 2010 |
| Location | Ilford Essex England |
| Build type | Refurbishment |
| Building sector | Public Residential |
| Property type | End Terrace |
| Construction type | Solid Brick |
| Other construction type | |
| Party wall construction | Solid Masonary |
| Floor area | 76.82 m² |
| Floor area calculation method | Treated Floor Area (PHPP) |
| Building certification |
Project Team
| Organisation | East Thames Group |
|---|---|
| Project lead person | East Thames Group, 29-35 West Ham Lane, Stratford, London, E15 4PH |
| Landlord or Client | East Thames Group, 29-35 West Ham Lane, Stratford, London, E15 4PH |
| Architect | Energy Conscious design, Studio 3, Blue lion Place 237 Long Lane, London SE1 4PU |
| Mechanical & electrical consultant | Environmental Design Associates, 31 Wick Road, Teddington, Middlesex, TW11 9DN |
| Energy consultant | ECD Project Services, Studio 3, Blue lion Place 237 Long Lane, London SE1 4PU |
| Structural engineer | Carter Clack Partnership, 49 Romney Street, Westminster, London, SW1P 3RF |
| Quantity surveyor | Brayer Group, Faringdon Ave, Harold Hill, Romford, Essex, RM3 8ST |
| Consultant | Public Participation, Consultation and Research, Studio 2, 193-197 Long Lane, London, SE1 4PD |
| Contractor | Brayer Group, Faringdon Ave, Harold Hill, Romford, Essex, RM3 8ST |
Design strategies
| Planned occupancy | Property is currently void, but suitable new tenants will be found who buy into the monitoring strategy. They will be fully briefed on their new home and given a simple home information pack to explain the various technologies and controls along with local community facilities, recycling centers and public transport. |
|---|---|
| Space heating strategy | Heating will be provided by a new high efficiency condensing gas boiler and new radiator system. Heat will be recovered from exhaust air via the use of mechanical ventilation with heat recovery unit. |
| Water heating strategy | Hot water will be provided by high efficiency solar collectors and large capacity thermal store with a high efficiency condensing gas boiler as a backup. |
| Fuel strategy | Mains Gas, Mains electricity (delete as appropriate) |
| Renewable energy strategy | Onsite electric production by 1.1 kWp photovoltaic panels and heat production by solar thermal collectors. |
| Passive Solar strategy | Window fenestration has been simplified in proposed replacement windows to maximise solar gain. |
| Space cooling strategy | HRV with summer bypass combined with natural ventilation for summer period. Night purging during heat waves. |
| Daylighting strategy | Window fenestration simplified in proposed replacement windows to maximise day light. A sun pipe roof light has been added to increase day light levels. |
| Ventilation strategy | Heat recovery ventilation and additional natural ventilation by opening windows during summer months as required. |
| Airtightness strategy | All existing vents and chimneys blocked up. New air barrier created by OSB board at ceiling level with taped joints and perimeters taped to masonry walls and plastered over. Service void created bellow this to eliminated penetrations. Windows, floors, junctions and all penetrations sealed with proprietary air tight tapes, membranes and grommets. All voids such as cavities filled to mitigate thermal bypass. |
| Strategy for minimising thermal bridges | Continuous insulation maintained throughout. Geometric thermal bridges minimised. Junctions assessed include: Ground floor junction, external corner, party wall, party roof, party floor, eaves, verge, window jamb, head and sill, door jamb, head and threshold. |
| Modelling strategy | Whole house modeling was undertaken in SAP, with the use of extension sheets produced for this competition. |
| Insulation strategy | -The mainj existing suspended floor will be lined with a breather membrane to improve airtightness and support mineral wool insulation to give a U-value of 0.19 w/m2K - The existing solid floor extension will be insulted with a thin layer of aerogel lam |
| Other relevant retrofit strategies | We propose to fit an intelligent heating controller designed to save energy and improve comfort in residential buildings. The system controls both central and water heating, reducing energy consumption by automatically monitoring and learning occupant behavior and preferences. It also provides an easy to use and simply user interface as well as covering all energy monitoring requirements. |
| Contextual information | A large proportion of housing stock in the UK consists of Victorian/Edwardian terraced properties located in the suburbs of towns & cities. These properties are very popular in that they provide ideal family accommodation in terms of size, outdoor space & location, all coupled with aesthetic, historical & cultural values that are held in high regard by the British public. Internal works are often required to make them suitable for modern-day living such as installing upstairs bathrooms and larger ground floor kitchens; but the robust, solid nature of these buildings allows them to be easily refurbished & amended to suit the needs of each generation of residents. |
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 |