Safety Information for Gas Appliance Chimney
Although older chimneys are more likely to suffer, new chimneys are not impervious to the damage that may occur in venting gas appliances. Whether the chimney in your home is old or new, the National Fire Protection Association and the Chimney Safety Institute of America recommend annual evaluations of all chimneys, no matter what type of appliance they vent.
Your chimney may be suffering from an improper heating/venting match without producing any visible symptoms, and sometimes the excess moisture produced causes visible results. Any of the following symptoms could point to a venting system that is not matched to
your heating system:
Make sure that your furnace was installed according to the manufacturers installation instructions and the National Fire Protection Association Standards. The two most important NFPA standards that apply to gas appliances are NFPA 54 and NFPA 211. Your appliance installation manual should give you all the necessary information.
Click Here for Additional Safety Information for Oil-based Chimneys
Your chimney may be suffering from an improper heating/venting match without producing any visible symptoms, and sometimes the excess moisture produced causes visible results. Any of the following symptoms could point to a venting system that is not matched to

- Damp patches on interior walls or exterior walls
- Peeling wallpaper
- Blistered paint
- Stains on the ceiling
- White efflorescence stains on outside of the masonry chimney
- Eroded mortar joints
- Crumbling bricks
Make sure that your furnace was installed according to the manufacturers installation instructions and the National Fire Protection Association Standards. The two most important NFPA standards that apply to gas appliances are NFPA 54 and NFPA 211. Your appliance installation manual should give you all the necessary information.
Click Here for Additional Safety Information for Oil-based Chimneys