Commercial Door Heaters

door heater car washCommercial door heaters are special heating systems made for loading docks, warehouses, car washes, construction sites, and other large commercial and industrial buildings.

They are typically used to heat large, high-traffic doors, such as hangar doors, and garage doors, that are frequently opened and closed.

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Most commercial door heaters have a heating element and a fan. These two parts work together to move large amount of warm air toward the door.

The heating element can be powered by electricity, gas, or propane, depending on the specific heater model and the needs of the facility.

Commercial door heaters we provide are built in the USA and are backed by industry leading warranties. They can handle the heavy use and rough conditions such as loading docks and car washes.

They are often equipped with built-in thermostats, which allow the user to set and maintain a desired temperature, and safety features such as overheat protection to ensure safe operation.

They can be mounted to the wall or ceiling and can be direct or indirect-fired, with direct-fired heaters blowing hot air directly onto the door and indirect-fired heaters blowing hot air into the space. 

They are typically installed on the outside of the door, but they can also be placed on the inside.

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We’ll be happy to help explain which door heater is best for your application.

For high-speed, directional heated airflow, door heaters offer exceptional value.

Automatic door heaters keep cold air from coming in when roll-top or overhead doors are opened. 

Door heaters were designed and built to be very cost-effective, reliable, and flexible. It can heat 900 MBH and move 6,000 CFM of air. A nearly 100% efficient burner uses either natural or LP gas.

Automatic Door Install Configurations

They can be mounted vertically just inside roll-top or straight-lift doors or mounted at an angle facing overhead doors. Connected to a door switch, the heater can automatically turn on and direct warm air toward the floor area near the door opening.

Key Features

  • Durable Stainless Steel Construction
  • Weatherproof Electrical and Gas Control Enclosures • ETL Listed to Meet UL-508A
  • Remote or Door-Switch Controlled
  • Automatic Electronic Spark Ignition
  • Flame Rod Burner Supervision
  • Maxitrol 14 Discharge Temperature Controls
  • Diagnostic Circuit Check Lights
  • Direct-Drive Axial Fan with Inlet Guard
  • Easy to Install at Any Angle
  • Two-Year Parts/90-Day Labor Warranty 


Door heaters can be used anywhere from loading docks in industrial factories to commercial buildings, among other places.

They are typically used to heat garages, paint booths, workshops, loading docks, and other areas where large doors are frequently opened and closed.

They are often used in cold climates to keep frost or ice from building up on the outside of doors.

Car Wash Heater System

Door heaters are beneficial for car washes in several aspects, such as:

  1. Door heaters can help keep the wash bay warm, which can make the washing process more comfortable for employees and customers during cold weather.
  2. Proper car wash heater system can dry the cars efficiently.
  3. They can lower energy costs by keeping warm air from escaping through open doors and keeping cold air from coming into the wash bay.
  4. They can also make the car wash run more smoothly by making it easier to open and close the doors, which cuts down on the time and effort needed to wash a car.
  5. Door heaters can also improve customer satisfaction by making the waiting area for customers warmer and more comfortable.
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Loading Dock Door Heaters

Loading docks on warehouses and factories can use door heaters for a variety of reasons, including:

  1. Heat loss. Open doors let energy escape. This drives up costs. Dock heaters prevent precious warm air from exiting through open truck doors.
  2. Inconsistent temperatures. Products and workers suffer when docks cycle between cold and warm. Open doors make stable temps hard to maintain. Commercial heaters curb this fluctuation.
  3. Discomfort. Employees endure frigid blasts of winter air upon each opening. This cripples productivity and morale over time. Targeted dock heating keeps staff warmer.
  4. Product protection. Many items are sensitive to even small dips in temperatures. Brief cold snaps degrade integrity. Commercial heaters safeguard inventory quality.
  5. Inefficient heating. Attempting to warm full warehouses demands excess energy usage. Dock heaters strategically temper zone areas only. This supports sustainability goals.

Commercial gas-fired door heater models are available that are made to be easily moved around and used in warehouses.

It also has a good fuel economy and works well for a long time.

Models are available that have a heating capacity of 900 MBH and an airflow capacity of 7,000 CFM. It burns natural or LP gas and uses a single 20-amp 230/115/1/60 circuit. It will quickly warm large areas and maintain space temperatures.

Key Features

  • One-Person Easy Handling
  • Durable Stainless Steel Construction (Painted Aluminized Steel Available)
  • Field-Switched Power (230V or 115V)
  • Field-Switched Gas (Natural to Propane)
  • 100% Efficient Maxon NP2 Burner
  • Weatherproof Control and Piping Enclosures
  • Automatic Electronic Spark Ignition
  • Flame Rod Burner Supervision
  • Non-Fused Disconnect (On-Off)
  • Integral space-temperature controls
  • Direct-Drive Axial Fan with Inlet Guard
  • Adjustable Airflow Switch
  • Two-Year Parts and 90-Day Labor Warranty

The housing is made of stainless steel, the controls are enclosed, and there is a fan screen guard at the inlet. An optional, lower-cost housing of painted aluminized steel is also available.

Advanced electrical controls include an airflow switch, a temperature stat, and the ability to choose 230V or 115V power in the field.

Door Heater Manufactures

Providing Industrial Ventilation Equipment to the Following Industries

Providing Industrial Door Heaters to the Greater Chicago area and Nationwide

R. Williamson & Associates can provide you with fast quotes on the correct door heaters  for your application.

We are official representative covering Illinois, Wisconsin, & Indiana.

We can also send out a trained specialist to assess the area and make certain the proper unit is being used for your specific application. 

We run tests on-site to see how cost effective each model will be to assure maximum efficiency.

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