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Patio Electric Heater Electric patio heaters provide an innovative way to increase your outdoor living space. Unlike traditional propane and natural gas-fueled patio heaters, which emit carbon monoxide, electric models don't require ventilation and are safe to use in closed spaces as long as they are not left unattended. To determine the power (BTUs) required to heat your space, you must calculate the cubic footage of the space and the temperature rise you wish to achieve. Power Patio heat
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