Industrial & Commercial Heating Uses

  • Workshops
  • Warehouses
  • Supermarkets
  • Offices,
  • Gymnasiums
  • Schools
  • Exhibition halls
  • Drying process such as food and painting.

Agricultural Heating Uses


  • Decentralized and oriented heating.
  • Simple installation and operation.
  • Wide power range from 50,000 Btu/hr to 400,000 Btu/hr or 15kW to 117kW.
  • Quick solution for heating large spaces, warehouses and garages.
  • No need for a heat distribution network.
  • Simple to control with a thermostat. 
  • High efficiency achieved by condensing units.
  • Easy maintenance.



A unit heater is a stand-alone appliance serving to heat a given space and capable of operating on propane or natural gas.

The equipment usually includes a heat exchanger, through which a fan blows air from the room to be heated. There are two types of indirect-fired heaters, indirect-fired axial heaters (WAB) and indirect-fired centrifugal heaters (WCB). The temperature rise is about 28°C and 36°C, respectively. The air flows and the blowing distances are much greater with a centrifugal fan, and sometimes designed with a duct to distribute the warm air.


  • Natural gas or LPG.
  • Rates 50/80/150/200/300/400 x1,000 Btu/hr or 15/23/44/58/88/117kW
  • Inshot burner makes the combustion more complete with lower CO and NOx.
  • Heat exchanger made by aluminized steel or stainless steel pipes.
  • Reliable Direct Spark Ignition.
  • The 12VAC low-voltage ignition controller, specially developed for HVAC industry, all troubleshoots can be easily identified by the indicator lights
  • Safer and reliable low-voltage 24 VAC combination gas valve with 100% shut off.
  • Flameout protection, fan malfunction protection, and overheating protection.
  • Special baffles in the heat exchanger can enhance the heat exchange efficiency.

Heating Power: 

Warehouse: 25-35 Btu/hr per ft2 or 80-110 W/sqm

Mechanical workshop: 40-60 Btu/h per ft2 or 120-180 W/sqm

Here are the criteria to consider in selecting the units:

  • Installation height;
  • Positioning;
  • Axial fan or centrifugal blower
  • Heating power;
  • Combustion: sealed or unsealed combustion;
  • Venting: combustion products are usually vented outdoors.

It is always best to start with a pre-installation checklist; a list of things to check before an installation takes place. The following is a basic checklist and is meant to serve as an example:

  • Pick a location that is suitable for the unit that is being installed.
  • Make sure that venting requirements can be met.
  • Check for structural issues that may affect the installation of piping or duct work.
  • Plan a gas piping route, including pipe sizing, that will properly supply the system.
  • Plan for proper condensate drainage when applicable.
  • Check for the proper clearance to combustibles as  recommended  by the  manufacturer and in accordance with local codes.
  • Make sure the installation will leave the unit accessible for future service.
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