... least 99.99% heating efficiency Energy saving commercial/industrial infrared radiant heater l 100% safetyl ... places: factory, warehouse, greenhouseCommercial places: office, shop, hotel, smoking area, exhibition, gymResidential places: room, patio, ... Industrial places: factory, warehouse, greenhouseCommercial places: office, shop, hotel, smoking area, exhibition, gymResidential places: room, patio, ...