Explosion-proof Duct
Heaters

Hazardous locations are those areas where a potential for explosion and fire exists due to the presence of flammable gases, vapors, pulverized dusts or ignitable fibers in the atmosphere. Hazardous locations are created from the normal processing of volatile chemicals, gases, coal, grains, etc., or from the accidental failure of storage systems for these materials.

Open flames are not permitted in these locations. The use of electric heating equipment is permitted with two major restrictions:
1) The surface temperature of the equipment cannot exceed the ignition
temperature of the hazardous atmosphere and
2) all arc and spark producing devices must be isolated from the atmosphere in an
appropriate enclosure.

Both people and equipment in hazardous locations can be heated safely and economically with electric heat. Electric heating is typically much less expensive to install and maintain than comparable remote oil or gas
fired heating systems.

Compact Unit Heater

Indeeco’s Compact explosion-proof unit heater is designed with both size and economy in mind. Compact advantages and unique features include :

• Compact Size : This small design is only 13 inches wide, which makes it ideal for applications where limited space is available.
• Low Cost : The Compact design offers the most economical solution for heating small Class I, Group D hazardous areas. It is a cost effective alternative to the use of explosion-proof convection heaters.
• Redundant Over temperature Protection : Primary and secondary automatic reset thermal cutouts for additional safety.
• Stainless Steel Construction : Provides superior corrosionresistant protection. Optional Dirty Duty

ULTRA-SAFE™ EXP Unit Heater

Indeeco’s Ultra-Safe ™ Exp explosion-proof unit heater is designed with both safety and versatility in mind. Unique Ultra-Safe ™ Exp features include :

• Industry’s Lowest Ignition Temperature Code Rating : T3C, 320°F (160°C)
• Dual Over temperature Protection: With both automatic and manual reset over temperature cutouts for additional safety.
• Nontoxic Propylene Glycol Heat Transfer Fluid
• Low 70 PSIG Relief Valve Setting : This assures that in an emergency,
  the initial escaping vapor temperature remains below the 320°F (160°C) ignition temperature.
• Corrosive Resistant Options : INDEECO offers three constructions
  suitable for most applications. Standard construction for use in dry
  non-corrosive areas includes : Welded steel heat exchanger; powder-coated
  cabinet; epoxy-coated motor.   A 316 stainless steel construction suitable
  for Waste Water Treatment Plants includes : 316 stainless steel heat exchanger,
  headers and tubes with aluminum fins; stainless steel cabinet; corrosive
  resistance hardware; epoxy-coated motor.  Third construction is suitable for
  use in Chemical Plants where chlorides are present and includes: Heresite®
  coated heat exchanger, cabinet, fan blade; corrosive resistance hardware;
  epoxy-coated motor.