Extend your boating season into the colder months with a thermostatically controlled BoatSafe® heater. These heaters automatically turn on at approximately 45°F to ensure that the air temperature in your engine room remains above freezing. This protection can delay the need to winterize your engine(s) and enables you to enjoy the water long after other boaters have quit! BoatSafe heaters meet USCG requirements with a safe, ignition-protected, energy-efficient design. Heater can be mounted in any orientation and includes a convenient press-to-test button. Heaters cycle on at 45°F and off at 55°F. Forced air heat gently warms engine compartment surfaces. Selection includes new 600W or 1000W models with a smaller footprint (compared to previous generation Jr. 250W and 750W models) for more heat in less space! Boats stored out of the water, twin-engine boats, or single-engine boats with a generator should use the larger model.