https://scientific-programs.sc....ience/wiki/Its_Histo
How the Best Patio Heater Gas Can Help You Extend Your Outdoor Entertaining Season The best patio heaters can prolong your outdoor entertainment season. These stylish, powerful heaters are able to provide heat to up to 215 feet2 of space and are powered by either natural gas or propane. Choose models that produce 40,000 Btu or more, enough to comfortably warm a medium-sized patio. Also, consider safety features like tilt switches and security straps for the propane tank. Cost to Run Patio heaters consume a lo