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AMC Marine Hydronic High Velocity Defrost Fan Heater, 3 x 3" (8,400 BTU's)

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Product Description

An AMC Cliffv's exclusive, defrost fan heater for marine hydronic systems. The defrost heater can be mounted in a variety of areas in either the horizontal or vertical position. It comes with multiple choices for ducting outlets to meet all your needs. The defrost heater has a maximum of 8,400 BTU's. This defroster comes with three 3" air outlet ducts, and mounting brackets for the heater base. The high velocity defroster comes with a three-speed, centrifugal blower available in 12V or 24V (as a special order). Ducting and vents are also available upon request.

Pulling from years of experience in the industry, AMC Cliffv’s fan heaters were custom built, in-house, to contain all of the best, most practical components for maximum efficiency. Designed with versatility in mind, this lineup of fan heaters covers a variety of output options and can be installed in multiple orientations, making them the perfect complement to any hydronic heater system. These fan heaters are available in a range of outputs from 5,300 to 19,250 BTU’s. They are capable of heating any space ranging from small spaces like heads all the way up to larger main cabins.

Each unit is encased in a durable, brushed aluminum housing. The heater core consists of 3/8” OD copper tubes that have a 0.014” wall. There are nine to eleven aluminum fins per inch that are 0.006” thick. For high efficiency, there is a 5 row, 5 pass full flow circuit made of 1” tubing. The water (coolant) inlet and outlet on each heater comes with ¾” female NPT fittings with optional PEX and hose barb adaptors. Both the inlet and outlet side of the unit come with a low-profile air bleeder valve to vent any trapped air that enters the system. The blower motor is available in either 12V or 24V. Replacement blower motors are available. Each unit has a one year manufacturer’s warranty.



  • BTU's: 8,400
  • Amps at 12V: 4A low, 5.8A medium, 11A high
  • Airflow (CFM): 119 low, 153 medium, 255 high
  • Air Outlet: three 3" air outlets
  • Height: 5"
  • Width: 12"
  • Depth: 14-1/4"
  • Available in 12V or 24V (special order)



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