| Aire Technologies, Inc. – Fire Dampers |
| Airtec Products – Plastic Ceiling Diffuser & EZ Trap |
| American Metal Products Group – Registers, Grilles & Diffusers |
| Artis Metals Co.Inc. – Roof & Wall Caps, Roof Flashings & Collars |
| Builders Best, Inc. – Metalflex & Venting Products |
| Camden Yards Steel – Sheet Metal |
| Chim Cap Corp. – Chimney Caps |
| Dayus Register & Grille, Inc. – Registers, Grilles & Diffusers |
| Deflecto Corp. – Air Distribution Products |
| E.W.C. Controls – Zone Dampers & Steam Humidifier |
| Fan Tech – Inline Exhaust Fans & HRV Units |
| Field Controls – Draft Controls & Power Ventors |
| Flexible Technologies – Flexible Duct |
| Gray Flex Systems – Flexible Duct |
| Gray Metal Products, Inc. – Prefabricated Pipe, Duct & Fittings |
| Hart & Cooley – Registers, Grilles, Diffusers, Insulated & Uninsulated Flex, Gas Vent & All Fuel Pipe |
| Majestic Steel USA,Inc. – Sheet Steel |
| Metal-Fab, Inc. – Registers, Grilles, Diffusers & Fire Dampers |
| Metals USA – Aluminum Sheets |
| Mez Industries – HVAC Duct System Connector Components |
| Plenums Inc. – Custom Curb Adapters |
| Reflectix Inc. – Insulation (Bubble Wrap) |
| Southwark Metal Mfg. Co. – Prefabricated Pipe, Duct & Fittings |
| Thermo Manufacturing Inc. – Thermopan Panning |
| Unimet Metal Supply, Inc. – Aluminum & Copper Sheets |
| Ventamatic Corp. – Power & Solar Attic Fans |
| Z-Flex (Novaflex) – Aluminum & Stainless Chimney Liners |
