Hurricane II Combi heater

Hurricane II Combi heater. If you spend time on your boat during the cold season or live aboard you need a heater. A heat pump won’t do in winter except to take some chill out of the air. Some real heat options include diesel fired heaters, propane heaters or a diesel fueled Hydronic system.

A Hydronic system utilizes water heated by a furnace and then circulated through the cabin. The water can also be used for onboard hot water requirements and hot showers. Heat from this type of system is not dry like that of a forced air heater, which dries out your skin. I grew up at home with Hydronic. A boiler/furnace heated water which circulated through radiators in the rooms.

What is a Hydronic heater

ITR heating system layout
ITR heating system layout

The circulation of hot water to provide heat is known as a “Hydronic” System. It is a closed system continually circulating coolant. It begins with a furnace fueled by diesel to heat the water.

A water pump circulates the hot coolant through a domestic water heater and then to the various fan units located throughout the interior.


Below is a testimonial sent to us from Mark Tilley of Canada, who shares his opinion of the Hurricane;

I noticed you have a page on water heaters now. You should look at the Hurricane Combi. We live aboard in Toronto so having a diesel heater that also heats our DHW is a major advantage over buying extra hydro for space heaters everywhere.

But the real plus is that it’s a 12V unit that will also heat the boat and DHW when at anchor when we’re cruising in non-tropical climates, and at a much greater efficiency that running the genset to drive an electric DHW tank. Con is price and complicated installation, which we got done professionally, but it was worth it. Mark



Hurricane II Combi

Manufacturers Description

The new all-in-one space and domestic water heating system

  • Patented no smoke, no smell 40,000 BTU diesel burner
  • Domestic water temperature rise of 65° F at 1 gpm
  • 5 thermostatically controlled space heating zones
  • A supplemental 1500W electric immersion element
  • Manual summer/winter switching valve
  • Domestic water temperature control valve
  • 14 x 16 x 23″ HWD 80 lbs


Hurricane II Combi Features

Maximum Heat Output Diesel Only 40,000 BTU/h 11.8 kW

Coolant and Water Connections 1/2” FPT

Exhaust Outlet 2” OD 51 mm

Coolant Tank Capacity 4 US gal 15 L

Fuel Consumption Running .40 US gal/h 1.50 L/h

Fuel Consumption Running .40 US gal/h 1.50 L/h

Power Consumption 6 Amps 72 Watts Plus 2.5 Amps for circ. pump

Dimensions H x W x D Weight (Empty/Full) 14” X 16” X 23” 80 lbs / 115 lbs 356 X 406 X 584mm 32 Kg / 48 Kg



Constant output of designed heat 12 volt system – no 115V required Sealed system – no seawater Heats domestic water on demand Service by owner – self diagnostic Serviceable at sea Engine waste heat can be used Preheat for cold starting engine.

Comfort with warm air Heats domestic water – unlimited Easy installation – 3/4″ tubing Service by owner – self diagnostic Serviceable at sea Engine waste heat can be used Preheat for cold starting engine Quiet operation Multiple heating zones

Hydronic V Forced Air

Hydronic Pros: Heat sink; Produces domestic hot water; Less cycling, so longer life Zone heating possible

Cons: Twice the cost of Forced Air More moving parts Difficult to draw in fresh air More humidity Noisier; Increased install time

Forced Air Pros: Drier air due to mixing fresh outside air; Lower cost; Easier install; Ducting can be used for A/C as well.

Cons: Less overall capacity; Higher cycling, shorter lifespan; Less efficient;

Manufacturers Contact

International Thermal Research

Hurricane II Combi; $4,770.00