The Model ADH-E Duct Heater is our workhorse heater in adding heat to any square or rectangular HVAC supply air duct. This heater has been specifically designed, developed and tested with symmetry in mind eliminating the need for right and left handed designs. This one heater may be installed in four different positions.

Higher duct to heat coverage, and more kilowatt options in all sizes compared to the competition.

• Duct Sizes up to 40” Wide x 20” High
  
• UL Listed (UL 1996)
  
• Patent-pending "Flip-Able" design
  
• Symmetrically designed heater
  
• No more left and right hand heaters
  
• One heater for six mounting positions with vertical up and down flow
  
• Can be rotated to fit the requirements and location of the HVAC system
  
• May be used as a stand-alone duct heater
  
• Offers lower standard heater wire watt density and higher duct to heat coverage
  
• More high and low kilowatt options are available in all sizes.

The Model ADH-C Duct Heater is ideal for use with larger duct sizes than the ADH-E can handle, and is available for square or rectangular duct sizes as large as 120” Wide x 144” High.

• UL Listed (UL 1996)
  
• A disconnecting magnetic control contactor per stage, or each 48 amp circuit within a stage
  
• 50 or 60 Hz design
  
• Fan interlock
  
• Power terminal board
  
• Control terminal board
  
• Grounding lugs
  
• Automatic limit switch for primary over temperature protection
  
• Manual reset limit switch for secondary over temperature protection
  
• Left hand offset control box
  
• Available in Bottom Mount