HearthRite Gas Infrared Heaters are a Vent-Free unit that produces great heat for those cold winter months. The Infrared technology works much different than traditional heaters. The Infrared unit heats objects in a room the way sunlight does. Heat is transferred from the source to objects in the room that will then radiate. This is a perfect heater if you are in an environment where cold air is being introduced into the room throughout the day. The infrared will keep you warm without wasting energy to heat the air.