Member |  |  |  |  | Postcode |
| Don White Services, Belfast, County Down | | * | | * | BT4 3FF |
| Greenheat Ltd. - Cambridge | * | * | * | * | CB3 0QF |
| Wallwork Heating Engineers, Newham | * | * | | | E12 6HN |
| CDB Consulting, Manchester | * | * | * | * | M1 2AQ |
| Vietec, Sittingbourne | | | | | ME10 2SY |
| Squires & Duran Plumbing & Heating Ltd., N. London | | | | | N12 8NR |
| Barry Sedgwick, Norwich | | * | | * | NR1 2HJ |
| Heat Plant Services, Bracknell | * | * | | * | RG12 7DT |
| D.C.Sales & Sons Ltd, Broad Oak | * | * | * | * | TN31 6EP |
| Heating Design Services, York | * | | | * |
YO1 5AT |