How does a balanced flue work in a condensing boiler?
How does a balanced flue work in a condensing boiler? In the case of a gas condensing boiler, the balanced flue contains two tubes: one tube lets oxygen in, the other tube lets waste gases out. In this situation, the boiler doesn’t pull oxygen from your house but from outside. Which is better balanced flue or fan flue? If your boiler has an existing balanced flue a large square flue through to the outside it will rely on natural draft and is often called RS (or room sealed). Updating the flue system with a fan flue will make the boiler...