Duct Heaters

A reliable source for Electric Heater information and leading Electric Heater Companies & Manufacturers.

Duct heaters work with existing central forced-air heating systems to preheat fresh air or returned air. The central air handler filters the air, re-heats it and blows it through the ductwork. The conditioned air is distributed throughout the building and is then returned to the central air handling unit (AHU). Read More…

Duct Heaters A duct heater is a heavy duty modular unit installed in the ventilating ductwork of commercial, residential and institutional HVAC systems, although smaller "duct" heating elements are used in the forced air heating systems of vehicles. Duct heaters can be complementary to a central heating system that utilizes forced air heating, also known as forced circulation heating or convection heating, where air is the medium that transfers heat. Fans and blowers are integral to the transfer of heat; their motion conveys the air through the duct heater.

Leading Manufacturers

Danvers, MA  |  978-777-0070

Backer Hotwatt is a superior designer & manufacturer of electric heaters and related heater accessories for various OEM & industrial applications. Backer Hotwatt also has a complete inventory and line of in-stock products available, as well as a technical index & heater installation instructions on our website. If you want a heater company with experience and innovation, call Backer Hotwatt!

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Backer Hotwatt, Inc. $$$

Bristol, CT  |  860-582-6776

For more than 70 years, Ulanet&trade has been engineering and manufacturing electric heaters, cartridge heaters, immersion heaters, tubular heaters, miniature strip heaters and bolt hole heaters, as well as industrial heaters and appliance thermostats and thermal time-delay relays.

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Ulanet™ $$$

Exeter, NH  |  603-418-7662

Tutco SureHeat is part of the Tutco Heating Solutions Group, the world’s largest heating element manufacturer and supplier. Tutco SureHeat is a manufacturer of high pressure, low flow, and high temperature industrial electric air heating solutions. All of our products are proudly engineered and manufactured here in the USA. Our many capabilities set us apart from our competitors, and it is our mission to help our clients improve productivity and safety in their applications.

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Tutco SureHeat $$$

Marietta, GA  |  888-676-0146

We are a leading innovator of electric heaters and our products are ideal for a wide range of industries. Here at Sigma Thermal we put your needs first. All of our heaters are fairly priced and come with top of the line support. Turn to us for quick turnaround and long-lasting solutions. Give one of our representatives a call today!

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Sigma Thermal $$$

Ipswich, MA  |  978-356-9844

Since 1921, Dalton Electric Heating has been offering electric heaters, industrial heaters, immersion heaters and cartridge heaters. Our Watt-Flex Cartridge Heaters and Diff-Therm Heaters are found worldwide in the automotive, plastics and aerospace industries. Give us a call!

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Dalton Electric Heating Co., Inc. $$$
placeholder image Backer Hotwatt, Inc. Ulanet™ Tutco SureHeat Sigma Thermal Dalton Electric Heating Co., Inc.

Electric heater manufacturers generally construct duct heaters in rectangular or square box configurations, but they can create rounded ones for the best fit in certain sheet metal ductwork.

Consisting of two major components, the heating elements and the electric terminal within the boxed framework, duct heaters can be bottom mounted, flange mounted, round collar mounted or slip-in and are easily installed in existing or new HVAC systems, with the heater control panel mounted in any convenient location.

Duct Heaters Duct Heaters - Thermal Devices

The two types of heating elements used in duct heaters are open coil and tubular (standard and finned), each offering certain advantages.

Open coil elements are coils of nickel chrome wire that are very popular due to excellent heat dissipation; however, tubular elements are more suited to demanding environments as they are sheathed with protective covers of metals such as aluminum, iron, stainless steel or steel.

Because of their sheathes, tubular elements are slower to respond but can hold up to humid and dusty atmospheres, and fins are used to help more quickly distribute the heat. Sheathed elements, especially finned varieties, offer a very long life with less maintenance and lower risk of fire and electric shock.

Choosing the right heating element, electrical components and controls is essential to achieving the highest economy and efficiency from a duct heater. Temperature sensing duct heaters can be encoded to regulate electric heat output based on a desired temperature, and modulating controllers can allow successful duct heater operation in even extremely low air flow. Plus, electronic enclosures act as moisture/debris resistant and explosion proof housings.

Duct Heater Informational Video