Carrier, EMI, Daikin, Friedrich, Hess Condensers, Lennox, Liebert, Mitsubishi, Ruud, Scotsman, Trane, Witt, York

Amarillo Gear boxes, Armstrong Humidifier, Bohn, Carrier,

Friedrich, Goodman, Lennox, Liebert, McQuay, Payne, Ruud, Scotsman, Trane, Vogt Ice Machines, York

Carlyle, Carrier, Copeland, McQuay, Tecumseh, Trane, York

Carlyle, Carrier, Copeland, McQuay, Trane, York

Alco, Allen-Bradley, Asco, Barber Colman, Dwyer, ESL, Fenwal, Fireye, Honeywell, ITT General, Johnson, Paragon, Penn, Ranco, Robertshaw, Siemens, Skinner, Sporlan, White Rodgers

Carnes, Fantech, Greenheck, ILG Industries, Lau, Loren Cook,

Penn Ventilator

AC&R, Alco, Asco, Beckett, Bramec, C&D Valve,

Doucette Industries, Engelhard, Erie Valves, Fasco, Henry Valve, Highside Chemicals, J.W. Harris, JB Industries, Lau, Little Giant,

Motors & Armatures, Mueller, Nibco, Parker, Ritchie/Yellow Jacket,

Superior, Uniweld, Virginia, Watsco

A.O. Smith, Baldor, Bearings, Belts, Lincoln, Magnetek, Marathon,

Motors & Armatures, Pulleys, US Electric

Allis Chalmers, Amtrol, Aurora, Bell & Gossett,

Fairbanks Morse, General Rubber, Ingersoll-Rand,

Paco, Peerless, Taco

Camfil Farr, Filtration MFG, Pamlico, Reliable, Titus

Modine Insitu ES2