Industrial & Commercial Heating, Ventilation, Air Conditioning, and Refrigeration Professionals
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HVAC Equipment Lines


LJ Wing

Who We Are

LJ Wing is a manufacturer of Heating, Ventilating, and Air Conditioning (HVAC) components ideal for controlling the temperature and quality of outside air for any commercial or industrial building. Our product mix includes steam or hot water integral face and bypass coilssteam or hot water unit heaterssteam or hot water boiler combustion preheaterssteam or hot water air handling units, door heaters and air curtains, and industrial gas unit heaters. LJ Wing invented the integral face and bypass coil concept 50 years ago to protect air handler coils from freezing when handling large amounts of outside air.  See our product catalog to view the full range of heating, ventilating and air conditioning components.

  • DOOR PROTECTION: DH Door Heaters; WAC Air Curtains
  • COILS: IFB, VIFB and MV Integral Face and Bypass Coils
  • MAKE-UP AIR: SAS Steadyair® Make-Up Air Units; FAS Fresh Air Supply Units, and WDF Direct-Fired Gas
  • Heaters: UNIT HEATERS
    1. HU, HCF, and HCR Unit Heaters; HMS, HMG High Mounting Series Unit Heaters; GA Gas Assemblies; and HLC High Level Circulators




New from LJ Wing Wing HS FAS



High Static Fresh Air Supply Units

The High Static Fresh Air Supply (HS FAS)
provides a versatile heating system for
applications requiring the ducting or filtering of
make-up air. Supporting up to Merv 10 filters or
2.5 inches of ducted static pressure, the HS
FAS is the perfect make-up air heater for
interior rooms such as kitchens, painting,
plating, welding, etching, and other food or
chemical processing facilities.



All Product Guide Company Website HS FAS