| HEAT EXCHANGERS | ADVECO LTD |
| DANFOSS LTD |
| DOMUS VENTILATION |
| FLÄKTGROUP UK LTD |
| REHAU BUILDING SOLUTIONS |
| TROX UK LTD |
| VIESSMANN LTD |
| ZEHNDER LTD |
| HEAT EXCHANGERS Condensing | FLÄKTGROUP UK LTD |
| TROX UK LTD |
| VIESSMANN LTD |
| HEAT EXCHANGERS District Heating and Cooling Applications | DANFOSS LTD |
| REHAU BUILDING SOLUTIONS |
| HEAT EXCHANGERS Flue Gas Unit | VIESSMANN LTD |
| HEAT EXCHANGERS Heat Pump Applications | DANFOSS LTD |
| HEAT EXCHANGERS HVAC Applications | DANFOSS LTD |
| HEAT EXCHANGERS HVAC-R Applications | DANFOSS LTD |
| HEAT EXCHANGERS Plate Heat Exchangers | ADVECO LTD |
| DANFOSS LTD |
| HEAT EXCHANGERS Swimming Pool Water | UBBINK UK LTD |
| VIESSMANN LTD |
| HEAT EXCHANGERS Whole House Ventilation Systems | DOMUS VENTILATION |
| FLÄKTGROUP UK LTD |
| GDHV VENTILATION - GLEN DIMPLEX HEATING & VENTILAT |
| UBBINK UK LTD |
| VIESSMANN LTD |
| ZEHNDER LTD |
