Warehouse heater''s radiant heat design produces 85,000 Btu/hr with no open flames, fumes, kerosene odor, or noise. Unit rolls easily on 4 tires to warm factories, interior construction sites, and open facilities. Heater consumes 4.2 lb of propane/hr from 100 lb cylinder. Safety features include mesh grid with exterior guard rails, tilt, and CO auto shutoff sensors.