| | Alstom Power Inc (Easton, PA) Heat exchangers, surface condensers, dampers & steam jet ejector units | |
| | American Warming & Ventilating (Holland, OH) Dampers, louvers, shutters & diffusers | |
| | Arrow United Industries Inc (Wyalusing, PA) Sheet metal dampers & louvers | |
| | BorgWarner Automotive Inc (Coldwater, MI) Automotive dampers | |
| | Borg-Warner Turbo Systems (Indianapolis, IN) Research & development: turbochargers, engine fans, clutches & dampers | |
| | Carnes Co (Verona, WI) Diffusers, registers, grilles, ventilators, humidifiers, terminal units, power roof ventilators, louvers, dampers, penthouse energy recovery devices & packaged systems; air to air heat wheels & system | |
| | Control Equipment Co Inc (Schaumburg, IL) Industrial steel dampers & butterfly damper valves | |
| | Curbs & Damper Products Inc (Roseville, MI) Sheet metal curbs, fire dampers & louvers | |
| | Danny's Dampers (Whiteland, IN) Metal fabricated dampers | |
| | Effikal International Inc (Lake Orion, MI) Electrical vent, flue & barometric dampers | |
| | Effox Inc (Cincinnati, OH) Dampers & expansion joints | |
| | Elsie Manufacturing Co Inc (Waterloo, IN) Fusible links for fire dampers | |
| | Freudenberg-NOK (Ligonier, IN) Hydraulic equipment & parts, machinery & motor mounts & crankshaft dampers | |
| | Globe Technologies Corp (Standish, MI) Fire protection devices for fire dampers & kitchen hoods | |
| | Hillsdale Tool & Manufacturing (Jonesville, MI) Vibration dampers & machined automotive parts | |
