Sunglo A270BK Portable Liquid Propane Outdoor Infrared Patio Heater - 34.5 x 34.5 x 93 in. - Black ColorThe Sunglo model A270 portable propane heater is ideal for open patio designs. The model offers the flexibility to move or remove the heaters as needed. Optional tie down kit is available to secure heaters to patio deck where required. When used with a standard 20 lb propane cylinder, the heater can be operated continuously for approximately 10 hours. Heat coverage varies depending on the wind exposure on patio. The average spacing between these