Mr. Heater F260560 Big Maxx Natural Gas Unit Heater, 80000 BTUIf you are looking to turn your garage or barn into a work space you can use all year round, you will have to find a safe quiet and reliable heat source. This 80,000 BTU Natural Gas Unit heater is the way to go. It uses a built in electric high velocity fan to pull cool air into the rear of the heater, across a heat exchanger, then forcing warm air into the surrounding areas. These heaters only require 115v AC power and can be vented vertically or