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Choosing For Patio Patio heaters can be powered by gas, electricity or propane to heat the air and warm outdoor spaces. Electric models heat the air with an emitter, whereas natural gas and propane heaters use fire. Most homeowners prefer propane patio heaters because they don't require installation and can be operated with a 20lb tank of propane. Electric models, like the AEI Infratech, can also be used to keep outdoor spaces warm and inviting. Cost When weighing their options, home and business ow