Installing a combustion air supply is the wise thing to do for your family and your home. Even though some types of combustion air installations can contribute to cold air moving across the basement floor, it does not occur in the volume you might think. This will confine the cold air to one area instead of spreading it across the floor. The Combustion Air publication illustrates these methods. Even without a combustion air supply, there is major air movement through your home.
Most homes have between one-half to one complete air change per hour.
While air exchange is important for your health and safe operation of combustion appliances, most homes need tightening for comfort and energy savings. The best remedy is to seal attic bypasses.