Do you have a masonry chimney?
Does this chimney serve a gas furnace, boiler or water heater?
If yes, there is important safety-related installation information for residential customers with gas appliances that vent into a masonry chimney.
For the installation and/or replacement of gas furnaces, boilers and water heaters in some homes, federal law requires a chimney liner. In most cases, replacement of gas appliances means installing a chimney liner. Residents should understand the requirements and installation restrictions for masonry chimneys.
Ask your licensed installer for details or learn more about your gas appliances from WSSC.
WSSC is the jurisdictional authority for natural gas and propane appliance installations in Prince George’s and Montgomery Counties.