Endless Summer patio heaters bring indoor comfort and convenience outdoors. Endless Summer patio heaters have an inviting 15' - 20' circle of warmth raises outdoor temperatures 10F- 25F degrees powering you to enjoy your backyard patio or pool deck much later into the fall and earlier in the spring than ever before. While they won't turn the dead of winter into a summer day the patio heaters adjustable temperature setting allows perfect control for a brisk evening barbecue early morning coffee or any other outdoor activity. Endless Summer patio heaters are safe economical and easy to use. They provide 40000 BTUs of heat a durable stainless steel burner and premium construction allowing for quick and easy assembly. Easy assembly with basic household tools. Engine system designed for commercial use Natural Gas fuel - hose for plumbing not included (must be plumbed directly to gas source) Multispark Electronic Start Two Year Limited Warranty