| GROUND SOURCE HEATING AND COOLING Ground Source Heat Pumps | DANFOSS LTD |
| FORTERRA BUILDING PRODUCTS LIMITED |
| GAIA CLIMATE SOLUTIONS LTD |
| GDHV HEATING - GLEN DIMPLEX HEATING & VENTILATION |
| OMNIE UNDERFLOOR HEATING |
| REHAU BUILDING SOLUTIONS |
| SCHUECO UK LTD |
| VAILLANT LTD |
| VIESSMANN LTD |
| ZEHNDER LTD |
| GROUND SOURCE HEATING AND COOLING Ground to Air Heat Exchangers | MARSHALLS CPM |
| REHAU BUILDING SOLUTIONS |
| ZEHNDER LTD |
| GROUND SOURCE HEATING AND COOLING Groundwater Energy Sources | DANFOSS LTD |
| FORTERRA BUILDING PRODUCTS LIMITED |
| GAIA CLIMATE SOLUTIONS LTD |
| GDHV HEATING - GLEN DIMPLEX HEATING & VENTILATION |
| VAILLANT LTD |
| VIESSMANN LTD |
| GROUND SOURCE HEATING AND COOLING Horizontal Collectors | REHAU BUILDING SOLUTIONS |
| GROUND SOURCE HEATING AND COOLING Probes | REHAU BUILDING SOLUTIONS |
| GROUND SOURCE HEATING AND COOLING Solar Energy Combined | VAILLANT LTD |
