Highly efficient and cost effective these unit heaters are available for both propane and natural gas fuel sources with easy installation and quiet operation for your garage, workshop, or warehouse. Mr. Heater unit heaters are CSA certified and can be mounted up out of the way leaving you valuable floor space. Heats up to 1000 sq. ft. Can be installed in low profile buildings with 7´ to 8´ ceilings and requires only 1 clearance from ceiling with 2 angle brackets. Power exhaust allows for vertical or horizontal venting (vent kit sold separately). Designed for right or left side venting. Aluminized tubular heat exchanger for maximum efficiency and longer life. Spark ignition features self-diagnostic control modular. Cabinet size: 17 x 25 W. x 18.5 D. Refer to model No. F102845 or F102840 for horizontal vent kit. The vertical (through the roof) vent kit is available through the manufacturer.