Showing results 1 - 10 of 10
Image
A direct-vent sealed-combustion furnace has dedicated pipes for combustion air and exhaust
Image
Because flue temperatures are cool, intake and exhaust ducts on a Category 4 direct-vent sealed-combustion condensing furnace can be made of PVC
Image
Image
Furnaces, boilers, and water heaters located within the home’s pressure boundary are mechanically drafted or direct-vented
Image
National Fuel Gas Code (NFPA 2012) identifies four categories for combustion furnaces and water heaters based on combustion type (sealed or unsealed) and vent pipe temperature
Image
Image
Image
Image
The natural draft and induced draft furnace are both Category I appliances that receive combustion air from the combustion appliance zone
Image
The raised hood at the base of the vent stack on this water heater shows that it is an atmospheric vented gas water heater