Heater Craft 300 Series Marine Heater w/ three, 3" vents - Heat Unit Only

$370.36 On Sale

Marine Heater - Heater Craft 300 Series Heat Unit Only
SKU: 474504
Mfg# 300 Elite Unit
UNIT: Each
In Stock - Ships out in 1 Business Day


The Heater Craft 300 Series Marine Heater is a 40,000 BTU/hour heater providing warmth from three, 3" vents to three areas of your boat. The 300 Series Marine Heater can deliver heat to bow and rear seating areas of your boat and have one vent ducted to the helm.

The Heater Craft 300 Series is a perfect way to take the chill from late night boat rides, warm up after a swim and extend your boating season on the water.

  • Heat Unit Only
  • 40,000 BTU/hr max with three, 3" vents, 12 volt
  • 45 degree face
  • Amperage: Med 5.8, High 8.5
  • Air Flow: Med 228 cfm, High 263 cfm.
  • Hose barb: 5/8" or 3/4"
  • Dimensions: 16" W x 6.5" H x 9.5" D

Included in the Heater Craft 300 Series Heat Unit Only:

  • The 40,000 BTU/hr Heater with 45 Degree Wrapper with Wire harness
  • Universal Mounting Brackets & Screws
  • Detailed Installation Manual
The Heater Craft 300 Series Marine Heater is also available in kits to fit your boat heating needs. Look in the Heater Craft section of for the Sport, Pro and Elite level kits.



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Does this include the blower or is this just the box and core?
Bryson S.

The heater unit comes with blower motor included.
Brian K.



Heater Craft warrants your Hydronic Heater System and Shower Wash Down System to be free from defects in material and craftsmanship under normal use and service by the original consumer purchaser for a period of four 4 years from the date of purchase.


  • All returns must be recevied within 30 days of receipt of the order.
  • Manufacturer defects reported within 30 days of receipt will be supplied a pre-paid label for return shipping upon approval.
  • Please contact Go2marine LFS Marine and Outdoor for Manufacture Defects, Returns and help with Warranties.