How do Combustion Air Rules Work When Sealed HVAC Gets Added?
Adding sealed HVAC equipment can feel like it should simplify everything, since sealed-combustion appliances draw air from outdoors and exhaust it outdoors through dedicated piping. In many homes, though, the change affects more than the new unit. Combustion air is tied to pressure balance, venting pathways, and the way the house breathes, especially when older … Read more