Circular Electric Duct Heaters

Uniquely AIRFLOW circular air duct heaters are constructed for building into tubular ducts. They are made of galvanised steel plate mounted with stainless steel tubular heating elements and equipped with terminal box with PG screwed gland for smaller watts units, wired to a connector block as standard or fully wired to an isolator as an option.


  • Standard models diameters from 150mm to 300/315mm
  • Outputs from 750W to 9kW  
  • Tubular Finned Stainless steel elements
  • Duct section and low profile terminal enclosure in galvanised steel
  • Built-in automatic and manual reset safety cutouts
  • Voltage: 230V 1 ph or 230V (9kW is 415V 3 ph)
  • Heaters are 1 stage, unless otherwise requested