Condensing furnace
Its parts
- Burner
- The boiler burner assembly must be rated for condensing due to the acidic exposure to flue gases.
- PVC vent
- The secondary heat exchanger extracts more heat from the combustion gas, cooling it to the point where there is condensation – hence these types of heaters are called “gas condensing.” These gas condensing tankless water heaters, like gas condensing furnaces, require venting through a vertical PVC pipe and a condensate drain.
- Vent termination
- Because the flue temperatures are cool, intake and exhaust ducts on a Category 4 direct-vent sealed-combustion condensing furnace can be made of PVC.
If it may be unsafe
If you smell gas, leave the house and call Peoples Gas at 866-556-6002 or 911 from outside. If your CO alarm sounds or anyone feels sick, leave and call 911 from outside.
AirLogic is not an emergency service.
Related pages
- Glossary: Condensing furnace
Its entry, and the guide's pages that use it.
- Gas furnaces
How a gas furnace heats, what AFUE means and the signs worth a closer look
Sources
- U.S. Department of Energy. Boiler Replacement Package Performance Requirements, Savings and Costs (DOE Building Technologies Office).
- ENERGY STAR. How It Works - Whole-Home Gas Tankless Water Heaters.
- U.S. Department of Energy. Direct Vent Equipment.