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Gas Patio Heaters for Restaurants and Bars Gas patio heaters can make seating areas of restaurants more inviting during cooler evenings. These free-standing heaters are powered by a bottle of propane tank housed on castors that allow for easy mobility. The initial cost of natural gas patio heaters can be higher however, they have lower operating costs over the long term. They are ceiling or wall mounted and are usually unnoticed because they are located above guests' view. Calcana High Ou