New to the patio-heater field, table-model LP heaters are fueled by 1lb Liquid Propane tanks, available "anywhere.".  You can also purchase an extension hose from a local "big box" hardware store to allow fueling from a 20 lb LP tank. Pilot with Piezo ignition.  Safety-tilt switch shuts off gas instantly if tilt exceeds 19 degrees.

Output is 11,000 BTUs, for a nice and warm 10' circle covered by the 20.5" dome.  Weather-resistant hardware is used exclusively, and the heater is easily moved from table to table - 23 lbs, 39" high.   CSA Certified.   1-year Limited Warranty.