The vent free heater with 20,000 BTUs will warm up your room like sun coming in from a window. At 99.9% efficiency - no heat is lost up the chimney or flue. It is completely safe and includes an Oxygen Depletion Sensor (ODS) that will shut off the heater if the oxygen levels drop to an unsafe level. The vent free Blue Flame heater operate with a 99.9% AFUE Efficiency.
WARNING: This product contains chemicals known to the State of California to cause cancer, and birth defects or other reproductive harm.For more information go to http://www.P65Warnings.ca.gov.