| Organisation Name | Address Line 1 | Town/City | County | Postcode | Telephone |
| Energy Saving Trust Ltd | 21 Dartmouth Street | London | | SW1H 9BP | 0207 227 0303 |
| Energywise Heating Limited | 10 | Richmond | Surrey | TW9 2SU | 07921 716208 |
| National Energy Action | St. Andrew's House | Newcastle Upon Tyne | | NE1 6SG | 0191 261 5677 |
| FEEAC - Federation of Energy Efficiency Advice Centres | 1 Cotton Street | Aberdeen | | AB11 5EE | 01224 253900 |
| Welsh Assembly Government | Housing Directorate | Cardiff | Wales | CF10 3NQ | 029 2082 1592 |
| The Heating People Limited | 1 Brooklands | Filey | North Yorkshire | YO14 9BA | 0845 838 2732 |
| Climate Energy Ltd | 16, Bentalls Shopping Centre | Heybridge | Essex | CM9 4GD | 01621 843888 |
| Gas-Tech | 9 | Bridlington | Humberside | yo16 7dw | 01262 672000 |
| Green Heart Heating Systems Ltd | Floor 5 Prince Consort House | London | London | SE1 7TJ | 0870 609 4587 |
| Vale Royal Borough Council | Housing Services, Wyvern House | Winsford | Cheshire | CW7 1AH | 01606 867651 |
