• Xtreme Bilge Heater XXHEAT (Medium) Boats up to 28'

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Other products by XTREME HEATERS
Item #: XXHEAT (Medium)
Our Price: USD $399.00


The XXHEAT is for boats up to 28'. Size: 8" x 4" x 5 1/8" / 450 watts.
Size: 6" x 4" x 5 1/8" / 300 watts.

The Xtreme Heater was the first heater to be tested for the ignition protection requirements of the ABYC E11, the U.S. Coast Guard, ISO 8846 and SAE J1171.


TRUE FORCED AIR HEATING circulates air more effectively, heats more evenly for more accurate climate control.  Other “radiator” style heaters rely on convection, leaving cold areas in the engine compartment.  Forced air assures a more accurate and consistent temperature in the entire engine compartment.

AUTOMATIC THERMOSTAT turns heater on at 40°F and off at 55°F +/-3° the tightest tolerance on any bilge heater on the market. Other heaters have a 5° tolerance in their thermostats, which can result in a inaccurate reading and inconsistent temperature control.

FAILSAFE DESIGN cannot overheat. The temperature-limiting characteristics of our heating technology is dynamic and self regulating.  Other heaters have no way of limiting their temperature should something go wrong.

HIGH EFFICIENCY your wallet will appreciate.  Xtreme produces heat faster, circulates more air andshuts off earlier.  Less run-time, means less money out of your pocket.

PRE-WIRED 20ft marine rated power cord with 110V 3 prong plug eases installation.

QUICK RELEASE BRACKET Works with all Xtreme products produced since 2004.

MAXIMUM LIFE Every component has been selected with superior MTBF (Mean Time Before Failure) ratings to enhance durability and reliability in the marine environment.

CERTIFIED Independently Tested to Meet:

  • U.S. Coast Guard Ignition Protection Standards
  • Transport Canada Ignition Protection Standards
  • ABYC E-11
  • SEA J1171
  • ISO 8846
  • MIL-SPEC 810E  Verified to be military-tough for Vibration, Humidity, High Temp and Low Temp operation

COMPLETE PROTECTION Fully anodized inside and out for superior protection from the harsh marine environment. While other heaters only have some parts protected, we anodize everything.

SMALL FOOT PRINT Makes installation easy in almost any size or type of boat, increases options for mounting in any boat, for better access in tight engine compartments.

FULL 2 YEAR WARRANTY and lifetime support for service Our heaters have proven so dependable, we’re increasing our warranty period to reflect our superior reliability

Additional Support Information

  It is kind of confusing when we say the Xtreme 600 (large model) will produce 800 watts. It will - in certain situations, such as when the air temperature is low enough inside the engine compartment where the heater is in operation, that in order to maintain temperature, it must use all of its dynamic capability to maintain temperature. In that scenario, it will call on more power to do so; right around 800 watts.

This is because it is a variable power device, which Xtreme offers over other heaters on the market, which offer a fixed resistance technology. It is good news for the user as the converse is also important; if something should fail (such as the fan), the Xtreme heater will regulate itself while the other heaters should be able to cook food.

All Xtreme Heater models utilize PTC based heaters.

PTC Technology…How does it work?

PTC is an acronym for “Positive Temperature Coefficient”.

What this means is that the Xtreme Heater will self limit and will respond automatically to thermal load demands placed on it by the environment, whether it be positive demands or negative demands; this is accomplished automatically within the PTC heater by its regulation of resistance as temperatures change or fluctuate.

A PTC heater will increase its resistance as temperature increases. Practically speaking, the wattage will increase as ambient temperatures fall and the wattage will decrease as ambient temperatures rise. The practical side to this is that the PTC air heater will maintain a consistent air temperature within the temperature tolerances specified and will never over heat in any circumstance.

Traditionally, temperature regulation has been accomplished using a combination of a fixed resistance heater and a thermostat. This has been, and still is today, a reliable method for heating enclosures. However, the problem can arise that if the thermostat fails you will have a heater running at maximum capacity with no way of shutting it down even as temperatures increase to an unsafe level.

The XTREME Heater also has a maximum output level that can adequately provide enough heating power to maintain temperatures within the enclosure at minimum ambient temperatures. But the difference is that this power level changes automatically in response to ambient or environmental demands.

What happens if a thermostat fails when a PTC heater is in the system? The heater will shut itself down to a minimum operating level without overheating anything. It is like treading water.

What happens if suddenly the fan fails and there is no airflow? The PTC heater shuts itself down to a minimum operating level without overheating anything. If there is a sudden thermal load placed on the heating system either by falling ambient temperatures or maybe a consumer caused condition, such as a door opened and cold air is allowed to enter the heating chamber, the PTC heater will automatically increase its heating power to replace the heat loss. As soon as this has been accomplished the heater will stabilize again at a lower power level, it will go back to the “treading water” mode. 

So you can see, when you use a PTC-based heater and a thermostat you have a control situation that can be compared to a person who wears both a belt and suspenders. It is equally as safe to eliminate the thermostat entirely and let the PTC control the temperature. The larger benefit to using the PTC technology is that risk or your exposure to liability is reduced.

XTREME Heaters provide the heat your boat requires to stay warm
and does this safely with reduced energy consumption:
All key benefits to the XTREME Heaters customer.


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