Can a radon mitigation system contribute to backdrafting?
Backdrafting is the condition that exists when the combustion products from a furnace or hot water heater are drawn back into the home rather than going up the chimney. This can happen when the air pressure in the house is so low that air is actually sucked down the chimney and into the home. A radon system pulls air from beneath the lowest floor. If cracks and penetrations in that floor and the floor wall joint are not properly caulked, the system could pull air from the lowest level of the house and thereby lower the air pressure in that level, possibly causing backdrafting.
