• A-Ryung

• A.O. Smith

• AAON

• ACR Copper Pipe

• ADP

• Advantage

• AEC

• AGT (Absolute Graphic Technologies)

• Allied Armstrong

• AM General

• American Gas Lamp Works

• American Water Heater

• Apiste

• Apple

• Aprilaire

• AquaComfort

• Avalco

• Bacharach

• Bard

• Beverage Air

• Bilstein

• BKW

• Black Pipe

• Bohn

• Bradford White

• Burks

• Burnham

• Caravell

• Carlyle

• Carrier

• Carrier Industrial

• Carrier Refrigeration

• Carrier Transicold

• Chromalox

• ClimateMaster

• Cold Jet

• Copeland

• Daikin

• Daikin-Oil Chiller

• Deltatherm

• Diversitech

• Dunkirk

• Ebara

• ElectraLED

• Electrolux

• Elkay

• Emerson

• Empire Comfort

• Eurocold

• First Company

• Friedrich

• Frigadon

• Fryka

• Frymaster

• Goodman Amana

• Governale Brother Inc.

• Gree

• Green Filter

• Greenheck

• Grundfos

• Habor

• Haier

• Hart and Cooley

• Hastings

• Hawa/Haewa

• Heat Controller (Comfort-Aire)

• Heat-N-Glo

• Heatcraft

• Hoffman (nVent)

• Hoffmann Filter Corporation

• Honeywell

• Hoshizaki

• Hutchinson

• Hyfra

• Ice-O-Matic

• ICP

• Innovair

• Interco

• iO HVAC Controls

• Islandaire

• JB Industries

• Johnson Controls

• Kanto-Seiki

• Kawngrim ( Nanocon )

• Kenmore

• King

• KLH

• Koolant Koolers

• Kouwakougyo

• Kramer

• Kwangrim

• Kwangrim (Nanocon)

• Laars Heating Systems Company

• Lahntechnik Duotemp

• Lennox

• Lennox Fireplace Parts

• LG

• Liebert

• Lobb

• Lochinvar