The Dyna-Glo Convection Heater generates 360 degrees of instant heat for construction sites, industrial workspaces, agricultural buildings, and other ventilated spaces. Rated at 200,000 BTUs, heats a maximum of 4,700 square feet for a period of 11 hours on a 100-pound tank, depending on the BTU level selected. This does not require electricity and it is fueled by a 100-pound liquid propane (LP) tank (not included). 100 pound tank run time is 11 hours at 200,000 BTUs. This unit is easy to ignite with piezo ignition and it has continuously variable control between low and high settings, for maximum comfort control. It is fully portable and easy to transport between sites. This includes a shut-off safety valve that stops the gas flow, if the flame is extinguished, keeping the user and the project safe. This includes a 10-foot hose and regulator. This product is CSA approved and meets all applicable standards, which cover important safety and quality requirements. The Dyna-Glo Convection Heater comes with a 1-year limited warranty that protects against defects in materials and workmanship.