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How to Choose the Best Patio Heater Electric The most effective electric patio heater is simple to install, creates lots of heat over a large area, and can be adjusted. It is also built with strength and is simple to operate. According to Matthew Griffith, prevention section chief of the Montreal Fire Department, shoppers should look for safety certifications when purchasing an outdoor heater. They should also ensure they have access to a power source when using the heater. Cost