The Dyna-Glo Single Burner Tank Top Radiant Heater generates infrared radiant heat that warms people and objects, rather than the air. It is a portable heating solution that is perfect for indoor (with proper ventilation) and outdoor construction use. Rated at 15,000 BTUs, heats up to a 15-foot radius for a period of 28 hours depending on the BTU level selected. The does not require electricity and it is mounted directly to a standard 20-pound liquid propane (LP) tank (not included). 20-pound tank run time is 28 hours at 15,000 BTUs. As a hand wheel is included to connect the P.O.L. tank connection to a standard 20-pound tank. This tank top heater has 3 variable BTU settings, steel heat reflectors, and the burner head swivels, to direct the heat and maximize comfort control. Safety features include a safety shut-off valve to stop the gas flow if the flame is extinguished and a mercury-free tip-over switch that stops the gas flow if tipped, to protect the user and the project. Dyna-Glo’s double-mesh burner design provides safe, reliable heat, even in windy conditions. This product is CSA certified which means it has been thoroughly tested and certified and meets all applicable standards, which cover important safety and quality requirements. The Dyna-Glo Single Burner Tank Top Radiant Heater comes with a 1-year limited warranty that protects against defects in materials and workmanship.