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Natural Gas Patio Heaters Natural gas patio heaters permit you to provide warmth to customers outside long after the seasons change, and can improve the profitability of your business. They require very little maintenance and can last for years. Keep the heater in a safe place from any flammable materials and follow the manufacturer's instructions for testing, servicing, and lighting. A trained technician from the service department should fix any leaks. Installation In contrast to propane models,