Manufacturers . . .
ACI
Actaris
Advanced Control Tech
Alco Controls 
Anderson & Forrester 
Antunes 
A.O. Smith
Asco Valve, Inc.
General Controls
Aspen "A" Coils
B-Line Systems Inc.
Bacharach
Baso
Belimo
Bell & Gossett
Belts
Beko Guards
Bramec
Cam-Stat / Watsco
Chandler Refrigeration
Conbraco
Cooper-Electro-Therm
Copper Tubing
Crown
Danfoss
Dongan Electric
Drainview
Dwyer
Edison
Emerson Motor Div.
Fluke / Wavetek Meterman
Ford Thermostat Wire
Functional Devices
Furon
G.C. Valves
Global
Grasslin Controls
Haier Air Conditioning
Hankison
Harris
Hoffman Enclosure
Hoffman Specialty
Honeywell Parts
Honeywell A To R
Honeywell S To Z
Honeywell Braukmann
ICM Corporation
Idec
Imperial Eastman
Indicator Lights
Inficon D-Tek
ITT General Controls
J-B Industries
Klein Tools
Johnson Controls
KMC Controls
Lau
Little Giant
MA-Line, Monti
Mamac
Mars
Maxitrol
McDonnell & Miller
Midco
Milwaukee Electric Tool
Miscellaneous
Mueller Brass
Nu-Calgon
Parker Hannifin
Prest-0-Lite
Precisionaire
Prolihix
PSG Industries
Ranco
Raychem
RDM Products, Con-Pak
Refrigerants
Reftec International Inc.
Ridgid
Ritchie Engineering
Robertshaw
Sanyo Air Conditioners
Sealed Unit Parts
Siemens
Sila-Seal
Slimduct
Superior Products
System Sensor
t.a.c./Barber-Colman
TCS Basys Controls
Tecumseh
Tekmar
Testo
Tridium
TRS Systems, Inc.
Veris
Vulcain
Wagner
Weiss Instruments Inc.
White-Rodgers/Steveco