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Gas Fire Patio Heater A gas fire patio heater can warm the seating area and create an inviting atmosphere for socializing. They can be powered by natural gas, propane or electricity. Electric models have the advantage of not emitting carbon monoxide, however they aren't as mobile as other alternatives. Propane tanks offer portability, but require refilling, whereas natural gas patio heaters are connected to a home's natural gas line and eliminate the necessity for canisters. Safety Features Pati