By running at 90% efficiency on standard 110-volt household current, the Well Traveled Living Fire Sense Infrared Patio Heater is substantially less expensive to operate than propane patio heaters, and it still keeps you warm. Made of steel with a black powder-coated finish, so it isnt affected by UV rays. Operates silently so you dont have to talk over the noise of your heater. Heat can be felt out to 9 ft. away within a matter of seconds of it being turned on. Protective aluminum-cover shield stops harmful emissions and toxic residuals. While its primarily intended for sheltered external use, it includes a PVC cover, so it can be used indoors as well. Telescopic pole adjusts easily between 72H and 93H. 12-ft. electrical cord. Head unit: 22L x 7.5W x 4.5D. Base dia: 18. Wt: 45 lbs. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Patio Heaters.