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Air Duct Heaters (DF, DI Series) Duct Heater

Caloritech™ Air Duct Heaters are designed for use in comfort heating applications such as makeup air heating, air preheating, air handling equipment, fan coils, terminal reheating, multizone reheating, heat pump auxiliary systems and return air heating. Unlike open coil designs, duct heaters fitted with tubular elements are not subject to hazards of electrical shock, which allows installation closer to a register or grille. DFF Series - Flanged Duct Heater with finned tubular heating elements DIF Series - Insert Duct Heater with finned tubular heating elements The finned tubular elements are constructed using a steel tube with corrugated steel fins wrapped around it and brazed together. This design increases the heat transfer surface of the element and resulting in a lower operating temperature than non-finned tubular designs and a more economical heater. DFT Series - Flanged Duct Heater with non-finned Incoloy® tubular heating elements DIT Series - Insert Duct Heater with non-finned Incoloy® tubular heating elements The non-finned incoloy® element design should be chosen where high humidity or slightly corrosive contaminants may be present in the air stream, as this type of element features higher corrosion-resistance than the finned element design.

Features

  • Available with finned and non finned tubular elements
  • Includes primary linear cutout on all units and secondary linear cutout on units under 300V and 30kW
  • Insert and flanged type construction available
  • Standard 16 gauge satin coated steel construction, special stainless steel construction also available

Specifications

Primary linear cutout, 160°F (71°C), 277/600 VAC, 25/10 AMP non-inductive
Secondary linear cutout, manual reset complete with backup magnetic contactor on units under 300V, 30 kW and less, 225°F (107°C), 277/600 VAC, 25/10 AMP non-inductive
A wide range of optional auxiliary duct heater controls available either as factory installed on the duct heater or as an EEMAC rated control panel for wall mount, including bulb holders, silent contactors, SCR controllers, switches, magnetic contactors and more
Available for supply voltages up to 600 V, 3 phase
Available in a range of wattages, from 1 kW to 120 kW depending on the size of the heater
Frame fabricated from 16-gauge satin-coat steel
cCSAus & CE approved; EAC Available