Manufacturer's Links
| Alpha | 01322 669443 |
| Ariston | 01494 539579 |
| Baxi | 08706 049049 |
| Biasi | 01902 304400 |
| Cannon | 01922 454353 |
| Chaffoteaux | 01952 222288 |
| DanFoss | 01234 364621 |
| Fernox | 01799 550811 |
| Ferroli | 0121 352 3200 |
| Glow Worm | 01773 828300 |
| GrundFos | 01525 8500000 |
| Halstead | 02476 351424 |
| Honeywell | 01344 656125 |
| Ideal | 01482 498660 |
| Johnson & Starley | 01604 762881 |
| Potterton | 08706 049049 |
| Ravenheat | 0113 252 7007 |
| Saunier Duval | 01698 828400 |
| Sunvic | 01698 810945 |
| Vaillant | 01634 292392 |
| Valor | 0121 386 6203 |
| Vokera | 0208 804 4344 |
| Worcester | 0990 266241 |