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Choosing a Small Gas Patio Heater If you're looking for an outdoor heater that can warm your outdoor space without taking up too much floor space, consider this model. It accommodates a propane tank that weighs 20 pounds and comes with a large heating radius. It comes with a built-in tip-over safety valve. The BTUs for this model are a bit lower than those of other models we've tested but it's adequate for most patios. It's sleek and easy-to-use design. Easy