With up to 20,000 BTU's, this state-of-the-art vent free technology does not require a flue or chimney. This vent free stove functions with the option of Natural Gas or Liquid Propane. Pleasant Hearth vent free stoves are the ideal choice to bring style and warmth to your home. With Pleasant Hearth vent free stove systems, enjoying the warmth and beauty of a fire has never been easier. Minimum clearance design allows ease of installation almost anywhere. This thermostatically controlled unit does not support a millivolt remote control. Check your local regulations on installation restrictions and requirements. Propane use requires 100-lb. tank or larger with two-stage adjustable regulator available from local gas company.