This bathroom heater was selected by the Hammacher Schlemmer Institute as the best after rigorous testing of heating effectiveness and safety. Despite being the smallest of all models tested, the heater only required 30 minutes to raise the ambient temperature in a bathroom by 13.8° F--twice as much as the unit that place second. The 1,500-watt heater generates 5,100 BTUs and emits hot air that is 120° F, yet it has no visibly glowing heating element. Unlike ordinary heaters that have long cords that can tangle, this compact heater attaches to a patented mounting bracket that fits over an electrical outlet, without drilling, so its short cord won't cause a trip hazard. The heater scored highest for safety because it automatically shut off 13 1/2 seconds after it was intentionally tipped over--the quickest of all heaters tested. Unlike lesser models, the heater automatically turns off if the airflow is blocked or an object prevents the fan from turning. The impact-resistant polymer shell is flame resistant and does not conduct heat, ensuring the heater remains safe to touch. The device can be used in rooms up to 100' sq., and its patented thermal efficiency technology adjusts air flow for more efficient operation. Includes a built-in accessory outlet, thermostat, and freeze-guard setting. 8 H x 9 1/2 W x 4 1/2 D. (3 1/2 lbs.).