Crown Verity outdoor heaters are designed to provide more heat, using less gas, than the typical inexpensive patio heater found in most box store retailers. The Crown Verity heater uses an oversized reflector the keeps more heat down below the unit where you want it. The head of all Crown Verity heaters is a two piece conical head that helps spread the heat away from the unit vs. having most of the heat go straight up. All fasteners, burners, emiter grates are made of stainless steel. The Crown Verity heater uses a standard 20 or 30 lb propane cylinder (not included), completely self contained & portable, provides clean circle of warmth, piezo ignition system, easy on/off tank access, weather resistant construction, 45,000 hourly btu's, adjustable heat output, csa approved, high output & fuel efficient conical burner, anti tilt wheelbase with safety cut off switch.