The Flagro FMA-550 Dual Fuel Direct-Fired Make Up Air Heater is proven to be one of the most effective ways for construction / industrial sites to control temperature, reduce air contaminants and keep moisture levels down. Having the ability to switch between Natural Gas or LP allows owners / operators more flexibility when bidding future projects that will require consistent dry heat. At 480 lbs and only 28″ wide the standard caster wheels (2 rigid / 2 swivel) allow this heater into many places other heaters just cannot go. With the included remote thermostat, achieving evenly distributed, dry air is possible with the heater inside or outside. Comes with protective square tubing crate allowing machines to be stacked up to 3 high.