Patio Heaters - Endless Summer Patio Heaters. Outdoor Patio Heaters allow you to enjoy the outdoor patio longer during fall and earlier during the spring time. Endless Summer Patio Heaters inviting 15' to 20' circle of warmth raises outdoor temperatures 10 to 25 degrees F, empowering you to enjoy your backyard, patio, or pool deck much later in the fall, and earlier in the spring, than ever before. While these patio heaters 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. These patio heaters provide 40,000 BTUs of heat, a durable stainless steel burner, and premium construction, allowing for quick and easy assembly. Endless Summer patio heaters operate using a propane grill cylinder, requiring no electricity at all, so you will never have to fight with extension cords. And because your family's safety is your number-one concern, all Endless Summer patio heaters feature a safety switch that immediately shuts the unit off if it is tilted.