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Door Heater Manufacturers and Suppliers

IQS Directory provides an extensive list of door heater manufacturers and suppliers. Utilize our website to review and source door heater manufacturers with our easy-to-use features which allow you to locate door heater companies that will design, engineer, and manufacture door heaters for your exact specifications. Our request for quote forms make it easy to connect with leading door heater manufacturers. View company profiles, website links, locations, phone number, product videos, customer reviews, product specific news articles and other production information. We are a leading manufacturer directory who will connect you with the right manufacturers whether you are looking for overhead door heaters, electric overhead door heaters, or over door heaters.

  • Leavenworth, KS 913-651-4420

    Heatron is a global designer and manufacturer of custom heating element components for OEM applications such as medical devices, lab equipment, semiconductor processing, thermal management, and LED lighting design and assembly. Products include flexible heating elements, thick film heating elements on ceramic or metal, cartridge heating elements, LED modules and specialty and custom heater and LED module designs.

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  • St. Louis, MO 800-394-6589

    Heatrex specializes in the manufacture of electric heat products including infrared heaters, electric infrared heaters, portable heaters, cluster, immersion and circulation heaters, switchgear space heaters as well as flexible bolt heaters.

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  • Wood Dale, IL 888-268-6396

    TEMPCO Electric Heater Corporation provides leading energy efficient infrared heating solutions. TEMPCO offers a complete range of gas fired low and high intensity infrared heaters for industrial, commercial, sports facilities, hospitality, agricultural and residential applications throughout Canada, the USA and beyond. For more information, call us today or visit our website!

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  • Flushing, MI 810-686-7221

    Do you need to cure paint, paper, plastics, textiles, tubing, wire, cable, etc.? Our Heat Division can design the medium-wavelength infrared heaters, rapid-heat medium-wavelength quartz infrared heaters, or robust long-wavelength ceramic infrared heaters and systems specific to your needs. Our heat consultants have been helping our customers put the pieces together for over 45 years. Contact us today and tell us what we can do for you!

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  • Salem, MA 800-808-4328

    For 49 years, we have custom designed, engineered and manufactured etched-foil-element infrared heaters and other products. Our infrared heaters are for processing applications—textile, semiconductor, scientific, plastics, printing, medical, graphics, food equipment and appliance industries.

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businessIndustry Information

Door Heaters

Door heaters provide a stream of heated air across frequently opened doors and entrances of buildings in order to create a barrier between the air outside and the air inside to avoid heat loss and unnecessary energy expenditure. Commonly used in shops, hotels, entrance halls and reception areas, and in workshops and warehouses, door heaters prevent exterior cold air from entering a large space every time the door is opened, and prevent the loss of heated air in the same way.

When a door is opened into a sealed building, a vacuum is created that encourages the movement of air. Installing a door heater disrupts this process and prevents the exchange of air from inside to outside. Door heaters can be gas-fired – using a gas flame to create heat, they can use boilers and steam as a heat source, or use an electric element to create heat. An air propeller, or fan, will be needed to force air across the door opening and to create enough resistance to prevent interior-exterior flow of air. Therefore, doorway dimensions need to be taken into consideration when determining size and capacity of door heaters to ensure adequate coverage. Larger door openings such as warehouses or garages may require more than one heater, and these can be placed side by side to fully cover the open space. Door heaters are ceiling or wall mounted but for optimal performance and results should be placed as closely as possible to the top of the door.


Typically a switch is installed on the doorway, or connected to the opening mechanism of the door, that turns the door heater on each time the doors are opening and closing as this is when the barrier is required to prevent heat loss. The continual operating of the door heater would result in high energy expenditure and the potential for overheating within the space itself, therefore a trigger switch or sensor is a necessary part of the mechanism. In door heaters, there are options for adjustable levels of heat and airflow. Some units can be run without the heating elements on, and therefore are able to be further used in summer months. In warmer weather, the purpose of a maintaining the interior temperature of a space to avoid extra energy loss is similar – to prevent the loss of the air temperature within the building (in this case cooled air) and to prevent the entry of the outside air. Another use for door heaters is for the general heating of a space when a high level of space heater is required. Some models of door heaters are adjustable and the heated air flow can be directed into a room rather than across the opening.

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