This claimer “The Charlton Home® McGregor Mobile Fireplace is a vent-free, electric fireplace which quickly heats up to 1,000 square feet without drying the air. This unit is ideal for homes, condominiums, lofts, apartments, and seasonal rooms. The 5,200 BTU infrared heater has (11) temperature levels to keep your room at a consistent and comfortable temperature”. IS NOT ACCURATE! Our main level is less than a 1,000 square feet and it heated, but not warm enough to cover the entire space. So we placed it in the sunroom which is 200 square feet and it keeps that space nice and toasty.