Finned Tubular Heaters

Finned tubular heater are the most common type of heating elements used for heating air and other gases. The fins along the tubular length assist in even heat dissipation. All elements have mild steel fins copper brazed to the tubular heating element sheath unless otherwise specified.

Duct heaters use fin tubular elements within its design to help reduce the watt density. It also allows for more consistent air flow streams within the duct and increases the life longevity of the elements.

In applications where tubular heaters are exposed to forced convection, placing fins around tubular heaters increases their surface area and thus improves their heat transferring capacity. Finned tubular heaters, compared to regular tubular heaters, run at lower surface temperatures for the same watt densities when placed in identical air streams

Despite their advantages, finned tubular heaters are not recommended for applications where outlet air temperatures exceed 600°F.

The physical characteristics of a finned tubular heater play a major role in the effectiveness of its heat transfer.

Fin material is continuously spiral wound tightly onto the element surface to increase the convective surface area for air and non-corrosive gas heating. Fin spacing and size have been tested and selected to optimize performance. Steel finned units are then furnace brazed, bonding the fins to the sheath to increase conductive efficiency. This allows higher wattage levels to be achieved in the same flow area and produces lower sheath temperatures prolonging heater life. For higher temperature or more corrosive applications, stainless steel fins securely wound on alloy sheath are available.

Application conditions such as vibration and toxic/flammable media should be taken into consideration when installing heaters.

The sheath material of a finned tubular heater and its watt density are two critical factors that affect its durability.

Mounting Attachments

Threaded fittings, if required, are the standard mounting attachments supplied with finned tubular heaters. These fittings are brazed or crimped onto the heaters. For special applications, finned tubular heaters can be made with mounting brackets that have special designs. 


  • Custom-formed to meet specific requirements
  • Precision wound resistance wire for long heater life
  • Superior heat transfer
  • Variety of lengths available
  • Easy to install
  • Durable
  • Even Heat Distribution

Bend Formations available for Finned Tubular Elements


  • Air heating
  • Liquid heating (oil , grease , water , corrosive liquids )
  • Radiant Heating
  • For other applications, refer tubular heaters section
MicroCoil Heaters UK Ltd.
Company No. 12367644
Registered Address:
2nd Floor, College House,
17 King Edwards Road,
Ruislip, London,
Telephone No: 01452 345141

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