The Dyna-Glo TT30000M Double Burner Tank Top Heater generates 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 9,000-30,000-BTUs, the TT30000M heats up to a 25 ft. radius for a period of 14 to 48 hrs. depending on the number of burners lit and the BTU level selected. The TT30000M does not require electricity and it is mounted directly to a standard 20-pound liquid propane (LP) tank (not included). The TT30000M has a run time up to 48 hours on one burner and up to 24 hours on both burners. Assembly is easy 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 high, medium and low variable BTU settings, steel heat reflectors and the burner heads swivel 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 2 mercury-free tip over switches that stop gas flow if tipped. Dyna-Glo's double-mesh burner design provides safe, reliable heat, even in windy conditions. This product is CSA certified, meaning it has been thoroughly tested and certified and meets all applicable standards that cover important safety and quality requirements. The Dyna-Glo TT30000M Double Burner Tank Top Radiant Heater comes with a 1-year limited warranty that protects against defects in materials and workmanship. Color: Silver.