| Gas Detectors (Brasch) | Air Conditioning Specialities Co. |
| Gas Fired Heaters (Reznor) | Airlink Products Corporation |
| Gas-Engine Drive Centrifugal Chiller | York International Corp. |
| GENERAL ANALYSIS CORP. - Refrigerant Detectors | Louis Horsefield & Associates |
| Goodyear - Air springs | Sausse M.W., & Co., Inc. |
| Gordon Platt - Low NOX Burner | Heat Technology Products |
| GRAHAM - Variable Speed Drives | Southern Ca A/C Distributors |
| GRAHAM - Variable Speed Drives | Engineered Comfort Systems |
| Grilles & Registers | Haldeman, Inc. |
| Griswold Flow Control Valves | JD Sales Co., Inc. |
| Griswold Water Quality Products | K.H. Watts Co., Inc. |
| Griswold - Coil Piping Packages | JD Sales Co., Inc. |