The IW/IWP Series is suitable for all industrial and commercial spaces that may be wet, damp or contain airborne contaminants. They hold the highest energy efficiency ratings in all of North America converting up to 50% of gas input into usable radiant energy. Unlike conventional heaters that only warm the surrounding air, the radiant energy from the IW/IWP Series is immediately absorbed by everyone below creating a more comfortable atmosphere. Also includes a corrosion-resistant and moisture-resistant burner enclosure, plus heater tube and reflector system.