The Dyna-Glo Tank Top Radiant Heater generates 360 degrees of 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) use. Rated at 40,000 BTUs, this radiant heater heats up to 1,000 square feet, for a period of 10.8 to 14.4 hours, depending on the selected BTU setting. The Radiant Heater 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 10.8 hours at 40,000 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 stainless steel heat reflectors and high, medium, and low variable BTU settings for maximum 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 unique patent pending design packs a lot of heat into a very small and easily portable heater, providing safe and reliable heat. 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 Tank Top Radiant Heater comes with a 1-year limited warranty that protects against defects in materials and workmanship.