| Residential |
| Carrier Corp. | http://www.corp.carrier.com/ |
| Residential |
| Fedders | http://www.fedders.com/ |
| Residential |
| McQuay International | http://www.climatemaster.com/ |
| Residential |
| Rheem | http://www.rheem.com/ |
| Residential |
| Trane | http://www.trane.com/ |
| Warm Air | Industrial / Duct | Applied Air, Mestek, Inc. | http://www.appliedair.com |
| Warm Air | Industrial / Duct | Armstrong Air Conditioning Inc. | http://www.armstrongair.com |
| Warm Air | Industrial / Duct | Dornback Furnace | http:/www.dornbackfurnace.com |
| Warm Air | Industrial / Duct | Thermo-Cyder Industries Inc. | http://www.thermocycler.com |
| Warm Air | Industrial for Duct | Thermo Products, Inc. | http://www.thermopride.com |
| Warm Air | Residential/Commercial | AAON, Inc. | http://www.aaon.com/ |
| Warm Air | Residential/Commercial | Adams Mfg. Co. | http://www.adamsmanufacturing.com |
| Warm Air | Residential/Commercial | Amana Co. L.P., Heating & Air Conditioning Div. | http://www.amana-ptac.com |
| Warm Air | Residential/Commercial | Bard Mfg. Co. | http://www.bardhvac.com |
| Warm Air | Residential/Commercial | Burnham Holdings, Icnc. | http://www.thermopride.com |
| Warm Air | Residential/Commercial | Consolidated Industries Corp. | http://www.consolidatedindustries.com |
| Warm Air | Residential/Commercial | Crown Boiler Co. | http://www.crownboiler.com |
| Warm Air | Residential/Commercial | Heat Controller, Inc. | http://www.heatcontroller.com |
| Warm Air | Residential/Commercial | Lennox Industries Inc. | http://www.lennox.com |
| Warm Air | Residential/Commercial | Thermo Products, Inc. | http://www.thermopride.com |
| Warm Air | Residential/Commercial | ThermoPride | http://www.thermopride.com |
| Warm Air | Residential/Commercial | Williamson-Thermoflo | http://www.williamson-thermoflo.com |
| Warm Air | Residential/Commercial | York International | http://www.york.com |
| Wood |
| Greenwood Technologies, LLC | http://www.greenwoodusa.com |