| BOILERS DOMESTIC Back Unit | DUNSLEY HEAT LTD |
| BOILERS DOMESTIC Biofuel | EUROSTOVE LTD |
| VIESSMANN LTD |
| BOILERS DOMESTIC Electric | ELNUR UK LTD |
| GDHV HOT WATER -GLEN DIMPLEX HEATING & VENTILATION |
| BOILERS DOMESTIC Electric Combination | ELNUR UK LTD |
| BOILERS DOMESTIC Electric ErP Compliant | ELNUR UK LTD |
| BOILERS DOMESTIC Electric Modulating | ELNUR UK LTD |
| BOILERS DOMESTIC Electric WiFi Enabled Smart Controls | ELNUR UK LTD |
| GDHV HOT WATER -GLEN DIMPLEX HEATING & VENTILATION |
| BOILERS DOMESTIC Gas Fired: | CALOR GAS LTD |
| HOWARTH TIMBER GROUP |
| VAILLANT LTD |
| VIESSMANN LTD |
| BOILERS DOMESTIC Heating and Electricity Generation | CALOR GAS LTD |
| BOILERS DOMESTIC LPG Propane Fired | CALOR GAS LTD |
| VAILLANT LTD |
| VIESSMANN LTD |
| BOILERS DOMESTIC Oil Fired: | VIESSMANN LTD |
| BOILERS DOMESTIC Solid Fuel | EUROSTOVE LTD |
| VIESSMANN LTD |
| BOILERS DOMESTIC Weather Compensation Sensors | DANFOSS LTD |
| REHAU BUILDING SOLUTIONS |
| VAILLANT LTD |
| VIESSMANN LTD |
| BOILERS DOMESTIC Wood Pellet Fired | VIESSMANN LTD |
