Pleasant Hearth’s Vent Free Gas Log Set is the ideal choice to bring style and warmth to your home. The state-of-the-art vent free technology does not require a flue or chimney. This vent free gas log set functions with the option of Natural Gas or Propane. 30,000 BTUs will heat up to 1,000 sq. ft. with 99.9% efficiency, $0.99 of every $1.00 spent on fuel is converted into heat. Forget the hassle or mess of a real wood burning fireplace or stove. With Pleasant Hearth’s Vent Free Gas Log Set, enjoying the warmth and beauty of a fire has never been easier. It has a minimum clearance design with the ability to be inserted into mostly every fireplace masonry. This thermostatically controlled unit does not support a millivolt remote controller.