Twin Hornet 45 400W - 800W Boat Bilge Engine Compartment Heater Purchasing any bilge heater on the market OTHER THAN the Twin Hornet 45 may be the worse decision you ever make for your boat! This is because only the Twin Hornet is equipped with two of every operational component. That's right! There are two thermostats, fans, heating modules and power supplies. All inside ONE housing. This heater is certified SAFE and meets the U.S. Coast Guard's requirement for operation in an explosive environment! The waterproof thermostats are wired in parallel, so either thermostat will keep the heater operating flawlessly You can not buy a safer heating module because they are manufactured with a space age material that is self-temperature regulating. It is actually impossible for them to overheat because of the physical properties of the material. The electrical resistance of the module changes with temperature. anodized aircraft aluminum housing,.50,000+ hour, long life, brushless, ball bearing, DC fans that are custom manufactured to our stringent requirements Our warranty is 3 years (50% longer than any other boat heater). Our electrical cord is made in the USA and is rated for -40F, wet locations and is oil resistant.