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 coils, steam or hot water unit heaters, steam or hot water boiler combustion preheaters, steam 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.

Typical Applications

LJ Wing steam or hot water integral face and bypass coils have been used in air handlers for medical buildings, laboratories, university research centers, and everyday commercial buildings for years.  Other LJ Wing products such as our steam or hot water unit heaters have been used to provide heating and tempered outside air for warehouses, distribution centers, schools, factories, waste water treatment plants, and aircraft hangers.

Why Use LJ Wing?

LJ Wing HVAC products have one of the lowest warranty cost histories in the industry. As the inventor of the category LJ Wing understands how to prevent coil freeze up better than anyone.  IFB and VIFB integral face and bypass coil selections are made simpler through the use of the LJ Wing Specifier software that can be downloaded free from this website.  LJ Wing also provides unique design support tools such as Computational Fluid Dynamic (CFD) modeling and Building Information Model (BIM) objects in Revit format.