This Dyna-Glo Portable Radiant Propane Tank Top Heater is CSA certified for safety with wind resistant burners and a safety tip switch. It also has a safety shut-off valve. The variable supply valve allows output from 9,000 to 30,000 BTU to heat a 25-foot radius. The adjustable angle burners can provide heat in multiple directions. It assembles in minutes with the quick-connect tank fitting, so you can have this heating solution ready in a snap. The advanced burner design keeps the flame lit, even in windy conditions. This Tank Top Heater is the perfect portable solution for properly ventilated outdoor and indoor construction use. Propane tank is not included!