Low-profile design maximizes overhead garage space;Exterior casing stays cool while operating, even in failure modes;Permanent installation;24V circuit included to accommodate external low voltage thermostats;Operating indicator light, and safety indicator light;Thermostat controls to accurately set your comfort level;Quiet operation with no vibration at any speed;20-foot throw at low stage;Quickly heats up space;Heats like a gas-fired unit with the benefits of electric