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https://yogicentral.science/wi....ki/Why_Patio_Heater_
Natural Gas Patio Heaters Natural gas patio heaters use the same infrared heating element that is used in propane patio heaters to warm the air around them. There are some important distinctions between these models. British thermal units (BTUs) are used to measure heat output. The more powerful the BTU rating is the greater the size of the area that a heater is able to comfortably heat. Cost-Effective
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