I.E.S. - Commercial/Industrial Evaporative Coolers, Pre-Coolers, 
Energy Recovery Units
McClintock & Bustad, Inc.
IAC-Sound Attenuators DMG Corporation
IBW Water-Tube Boilers Heat Technology Products
Ice Thermal Storage - BAC, CALMAC, FAFCO Air Treatment Co.
Trane Company
DMG Company
Infra-Red Heaters (Solaronics) Airelink Products Corporation
Infra-Red Heaters, Gas (Space Ray) Air Conditioning Specialties Co.
Infrared Heaters Haldeman, Inc.
Insulation Material - KNAUF; OWENS-CORNING; INSULTHERM Airelink Products Corporation
ITT - Standard Heat Exchangers Heat Technology Products
ITT Bell & Gossett - Centrifugal Pumps, Shell & Tube Dawson Co.
Brazed Plate; Plate & Frame Heat Exchangers, Hydronic Specialties, Variable Speed, ITT Domestic Pump - Condensate Handling Equipment, Industrial Vacuum Pumps Dawson Co.
ITT Hoffman  Steam Specialties - Air Valves, Radiator Valves, Y-Strainers, Condensate Pumps Dawson Co.
ITT McDonnell & Miller - Level and Flow Switches, Boiler & Pump Controls Dawson Co.