| A.O. Smith |
| A/C Zincs |
| AC & R |
| Accord Industries |
| Acme-Miami |
| Air King |
| Aleco |
| Amcraft, Inc. |
| Amtrol, Inc. |
| Aquaguard |
| Aquatherm |
| Armacell, LLC. |
| ATCO Rubber Products |
| Bard |
| BBJ |
| Bel Thermal Units, Inc. |
| Bell & Gossett |
| Best Rag |
| Bramec Corporation |
| Browning/Emerson |
| Carson Industries, LLC. |
| CertainTeed |
| Cooper B-Line |
| Cooper Tools |
| Covalence Adhesives |
| CPS Products, Inc. |
| D&S Products |
| Deflecto |
| Design Polymerics |
| DEVCO Enterprises |
| Diversitech |
| Doucette (Heat Recovery Units) |
| Dust Free, Inc. |
| Edison Fuse, Inc. |
| Emerson Motors |
| Energizer Battery, Inc. |
| Erie |
| ESP |
| Fasco |
| Fasson |
| Fieldpiece |
| Five Two One |
| Florida Heat Pump |
| Fluke |
| Follett |
| Ford Wire & Cable Corp |
| Fujitsu |
| Furnas |
| Gator Metal |
| Genesis |
| Global, The Source |
| Gorilla Glue Company |
| Grasslin Controls Corporation |
| Grindmaster |
| Gruner Brass Fittings Corp. |
| Hart & Cooley |
| Heatcraft |
| Henry Technologies |
| Honeywell - Environmental & Combustion Controls |
| Honeywell (Refrigerant) |
| ICM Controls |
| Ideal Clamps |
| Inficon, Inc. |
| Invensys |
| J.W. Harris Co., Inc |
| Jason Industrial, Inc. |
| John Winslow |
| Johnson Controls |
| Kano Laboratories |
| Kool Star |
| La-Co |
| LG Electronics |
| Little Giant Pump Company |
| LUX |
| Mainstream |
| Malco Products, Inc. |
| Ma-Line |
| Manitowoc |
| MARS (Motor & Armatures, Inc.) |
| Mason Industries |
| McCall |
| Miami Tech |
| Midwest Fasteners, Inc. |
| Metal Shop |
| Mueller (Copper Tubing) |
| Multiplex |
| Nelco Products, Inc. |
| Nu-Calgon Wholesaler, Inc. |
| NuTone, Inc. |
| Oasis Corporation |
| Kickstart |
| Owens Corning |
| Packard |
| Packless |
| Parker Hannifin Corp. |
| Precision Aluminum Products |
| Precisionaire |
| PSG Controls, Inc. |
| Purolator |
| Radiator Specialty Company |
| Raychem |
| RDI |
| Rectorseal |
| Refrigeration Research |
| Research Products |
| Ritchie Engineering Company, Inc. |
| RM Enterprises |
| Ruud |
| Servend |
| Sherer Manufacturing Incorporated |
| Superior Valve |
| Shubee |
| Siemens |
| SMD Research, Inc. |
| Specialty Chemical |
| Sporlan |
| SPX Service Solutions / Robinaire |
| Supco (Sealed Unit Parts) |
| Superior Signal Co., Inc. |
| System Sensor |
| Tecumseh |
| Temprite |
| Testo |
| Thermofin |
| 3M |
| Tropical Asphalt |
| True |
| Turbo Torch |
| UEI |
| Uni-Line, North America |
| Uniweld |
| Venture Tape |
| Vermette Machine Company |
| Virginia KMP |
| Water Gard |
| Weiss Instruments, Inc. |
| White Rodgers |
