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What to Look For in a Garden Patio Heater Electric If you're looking for more finesse from your patio heater electric then look out for models that have different temperature settings. This can help to reduce the cost of running by using only the heat you need. Also, consider the power of heating of each model, which is listed in BTUs. A higher number will generate more heat, and can be used to calculate the size of space that a heater can heat. Versatility Patio heaters let you extend the usage of yo