| T.P.S. - Pre-Insulated Underground Pipe | Heat Technology Products |
| T.S.I. - Custom Refrigeration Equip. | DMG Corporation |
| Tanks, Storage, Feed, Blowdown | Parker Boiler Co. |
| Teco-Chill Engine-Driven Chillers | Dockendorf, W.G., Inc. |
| TELEDYNE LAARS - Boilers | Southern Ca A/C Distributors |
| THE DELFIELD CO. - Kitchen Ventilation | Southern Ca A/C Distributors |
| Thermal Air Handlers | Conditioning Components Co. |
| Thermal Energy Storage System | DB Sales & Service | Thermal Liquid Heaters | Parker Boiler Co. |
| Thycurb - Roof Curbs | Sausse M.W., & Co., Inc. |
| Titus Flow Bar - Air Bar | Toro-Aire, Inc. |
| Titus Products - Air Distribution | Toro-Aire, Inc. |
| Titus Products - VAV/CAV Boxes & Terminals | Toro-Aire, Inc. |
| Tower Tech - Fiberglass & Concrete, Modular Cooling Towers | Engineered Comfort Systems |
| Tracer - Factory Mounted Controls | Trane Company, The |
| Trion - Electrostatic Filtration Systems | Haldeman, Inc. |
| Triple- Deck Multizone Air Handlers (Governair, Temtrol) | Air Treatment Corp. |
| TSI Sound Traps/Panels | Conditioning Components Co. |
| Tuttle & Bailey Air Distr. & Terminal Boxes | Haldeman, Inc. |
| Twin City Fans | DMG Company |
| Two-Stage Direct Gas Fired and Steam Absorption Chillers |
York International Corp.
McQuay International Dunham-Bush |