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Natural Gas Patio Heaters Like propane patio heaters, natural gas models utilize an infrared heating element that warms the air that is in their immediate vicinity. There are some significant distinctions between these models. The heat output is reported in British thermal units (BTUs). The more powerful the BTU rating, the larger space a heater will comfortably cover. Cost-Effectiveness Natural gas patio heaters are the most affordable option for homeowners as well as businesses
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