Mr. Heater Portable BIG Buddy Heaters, 4,000/9,000/18,000 Btu/h

Features: Ergonomic easy-carry handle | Low oxygen shut-off pilot safety system for indoor & outdoor use | Blower fan power on/off switch | Large four-position heat level control knob with built-in Piezo starter | Integrated hot air blower venting system | Attached swing-open doors with swivel-out mount for easy cylinder installation | Porcelain coated reflector for extended life | Dual ceramic burner tiles with shock absorbing floating insulation | High-temperature coated safety wire guard | Key shaped rear-mounting holes for wall mounting