Kalglo Infrared Heaters have rugged metal heating elements. No glass tube or lamps to break and no open flame - fire hazard minimal! They do not remove oxygen from or put moisture into the air as gas heaters do. They emit no visible light nor UV, only pure radiant heat.Overhead hanging style IR heaters from 800W to 2000W for use in heating animals, people, and surfaces. Models available with or without built-in, patented electronic controller and remote IR sensor. Safe, Clean Heat!!