Editor's Note: "Back to Basics" is a column that will run periodically in PME reviewing the basic principles of plumbing engineering.
Most professionals with a strong plumbing background are pretty confident about the wet side of a boiler installation. But, it is just as important to fully understand the importance of venting combustion by-products outdoors. Ensuring that flue products are properly and safely removed from a boiler and carried outside of a building is essential to ensure proper boiler operation.