PORT BUDDY PROP HTR 4 000/9 000/18 000 BTU Ergonomic easy-carry handleLow oxygen shut-off pilot safety system for indoor outdoor useBlower fan power on/off switchLarge four-position heat level control knob with built-in Piezo starterIntegrated hot air blower venting systemAttached swing-open doors with swivel-out mount for easy cylinder installationPorcelain coated reflector for extended lifeDual ceramic burner tiles with shock absorbing floating insulationHigh-temperature coated safety wire guardKey shaped rear-mounting holes for wall mountingBuilt-in tip over shut-off switch Output Power 4000 Btu/h Max , 9000 Btu/h Max , 18000 Btu/h Max Working Area 400.00 sq. ft. Max Fuel Type PropaneUsage 1 1 lb. Cylinder 1.5 to 6 hrs, 2 1 lb. Cylinders 3 to 12 hrs, 2 20 lb. Cylinders 50 to 220 hrsHeight 17 1/2 inWidth 10 inLength 17 in