Techno Bel India

Duct heaters are a type of heater bank enclosed in rectangular box with or without insulation.They are used to reduce humidity in an air condition duct.Duct heater can be installed in AC duct or AC Evaporator chamber.       These type of heaters can be used in heating of rooms or chamber.
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.
1. Flanged Duct Heater with finned tubular heating elements
2. 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.
Flanged Duct Heater with non-finned tubular heating elements
Insert Duct Heater with non-finned  tubular heating elements
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.