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Natural Gas Patio Heaters Like propane patio heaters, natural gas models utilize an infrared heating element to warm the air around them. There are a few key distinctions between these models. British thermal units (BTUs) are used to measure the heat output. The more powerful the BTU rating, the more area a heater is able to cover. Cost-Effectiveness Natural gas patio heaters are the most economical option for homeowners as well as business
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