The Zobo ZBTT15 Single Burner Tank Top 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 9,000 - 15,000-BTUs, the ZBTT15 heats up to a 15 ft. radius for a period of 28-hours to 48-hours depending on the BTU level selected. The ZBTT15 does not require electricity and it is mounted directly to a standard 20 lbs. liquid propane (LP) tank (not included). Assembly is easy, as a hand wheel is included to connect the P.O.L. tank connection to a standard 20 lbs. 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 gas flow if flame is extinguished and a mercury-free tip over switch that stops gas flow if tipped, to protect the user and the project. 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 Zobo ZBTT15 Single Burner Tank Top Radiant Heater comes with a 1-year limited warranty that protects against defects in materials and workmanship. Color: Gray/Black.