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Hanging Options In contrast to natural gas or propane heaters for patios, electric heaters do not emit any harmful emissions. Electric heaters are safe to use in a small space such as a covered patio or gazebo. The kind of heater you choose will be determined by the size and the climate of your outdoor space. It is also important to determine the method by which the heater will be installed. Ceiling Mounting There are a myriad of options for outdoor patio heaters that are hung on the