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Please Note: Updated Monday, May 30, 2020  We are open for business as usual. Well, mostly usual. We hold and ship inventory locally as well as directly from manufacturers and from some marine distributors. We are doing our best to reflect inventory that is actually available, but inventory updates are slower than usual due to the changing work situations for all business. Additionally, we now have started to see longer than normal backorders from manufacturers. We recommend that if you need a product not to wait until the last minute to order, as inventory may be gone for a substantial period of time once they go on backorder. International orders may also take longer than normal to ship. We are sorry for these delays.

Save 10%

REAL Heat 25,000 Btu Marine Hydronic Defroster Heater W002-5424

List price: $449.10
You save: $44.74 (10%)
30 days

SMS W002-5424 REAL Defrost heater 2 @ 4" kit

The REAL fan heater model 5424 was designed to serve as a defrost unit or to heat large outdoor areas such as a flybridge with minimal space requirement. The REAL fan heater model 5424 is rated to 25,000 BTU at 265 cfm on the high setting. The unit can be mounted with the barbs facing either direction with the dual bleeder mounts on the water connections. This unit comes with two open-only black outlets and one 6’ section of duct. Outlets of various other colors are separately available to match the interior of your boat. The unit comes with fittings to install into a ¾“ hose system. Fittings to meet different sizes or PEX systems are separately available.


  • Unit height - 7.5" (8” incl. bleeder)
  • Unit width - 13"
  • Unit depth - 12“(including motor)
  • Amp -9.6 amps (high)
  • Airflow - 265 cfm (high)
  • Max. Est. BTU/h - 25000
  • Weight - 8 lbs.
  • Hose Barb - ¾" NPT to ¾“ hose

This kit includes

  • Single 12v three-speed motor
  • Three speed switch
  • Double 4" outlets w/ 3’ of duct for each outlet
  • White powder coated aluminum casing

24V DC fans optional


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