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Electric Patio Heater Reviews A patio heater can bring a welcome touch of warmth to your backyard. It's important to consider safety features such as an automatic shutoff and an enduring base. Also, think about whether you would prefer electric or propane heating. Propane heaters require a fuel tank that can be filled while electric heaters can either be wired up or plug-in. 1. Kettler Kalos Copper Lantern Patio Heater The Kettler Kalos is a stylish and easy-to-use patio heater.