Watlow® duct heaters are constructed of sturdy 0.430 in. (11 mm) diameter WATROD™ heating elements mounted to a 1⁄4 in. (6 mm) thick steel flange. These air duct heaters are easily adapted to many non-pressurized air-heating systems.
Duct heaters are easily installed in applications requiring a wide range of temperature versus air flow combinations.
Many other sizes are available – Please inquire
Allow 1 to 2 weeks for delivery
Watlow® duct heaters are constructed of sturdy 0.430 in. (11 mm) diameter WATROD™ heating elements mounted to a 1⁄4 in. (6 mm) thick steel flange. These air duct heaters are easily adapted to many non-pressurized air-heating systems.
Duct heaters are easily installed in applications requiring a wide range of temperature versus air flow combinations.
The modular duct heater offers increased reliability. The individual modules are removable through the housing of the assembly, which eliminates the need to pull the complete heater from the ductwork. This reduces downtime costs because the heating elements can be replaced individually. Performance improvements include quicker response time and reduced infiltration from the air stream being heated into the electrical enclosure.
Watlow air duct heaters offer advantages over gas or oil fired and open coil electric units with:
Duct heaters with general purpose enclosures meet UL® and CSA component recognition to 480 and 600VAC maximum respectively—UL® and CSA file numbers are E52951 and 31388.
Features Benefits
Long life Incoloy® sheath
corrosion/oxidation while protecting resistance coils against contamination
MgO insulation filled elements compacted to rock hard density
Maximizes dielectric strength, heat transfer and life
Field replaceable heating elements
Permits easy service and reduces downtime. Element change-out is made simple by a single screw clamp (D SERIES only)
3 1⁄2 in. (90 mm) thick mineral insulation
Keeps wiring cooler and reduces heat loss Silicone resin seals rated to 221°F (105°C)
Protects elements against moisture and other containments
General purpose terminal enclosure
Offers easy access to wiring 1⁄4 in. (6 mm) inside diameter thermowell
Accepts an optional Type J or K thermocouple for accurate sheath temperature sensing (D SERIES only)
Rigid stainless steel supports
Prevents element sagging or deformation in various mounting positions
1⁄4 in. (6 mm) thick steel flange with 3⁄8 in. (9.5 mm) diameter mounting holes
Easily bolts to the duct wall
WATROD hairpins are repressed (recompacted) after bending to assure MgO density
