A flue pipe is the vent connector that carries combustion gases from a furnace, boiler, fireplace, or water heater to a chimney or direct vent termination. It helps expel carbon monoxide, smoke, and water vapor safely outdoors. Flue pipes are sized and routed to match the appliance and fuel type so draft remains stable and safe.
/fluː paɪp/
A flue pipe is the vent connector that carries combustion gases from a furnace, boiler, fireplace, or water heater to a chimney or direct vent termination. It helps expel carbon monoxide, smoke, and water vapor safely outdoors. Flue pipes are sized and routed to match the appliance and fuel type so draft remains stable and safe.
What does a flue pipe do?
It carries combustion gases from HVAC or water heating equipment to the outdoors, helping prevent indoor air hazards.
Source: The Cooling Company
Properly routed flue pipes prevent leaks and backdrafting.
A gas furnace and a water heater share a vent connector that routes exhaust into the chimney. The flue pipe keeps combustion byproducts out of the home while supporting efficient, steady draft.
Have flue pipes inspected annually for corrosion, loose joints, or blockages to protect indoor air quality and keep heating equipment running efficiently.
“Have flue pipes inspected annually for corrosion, loose joints, or blockages to protect indoor air quality and keep heating equipment running efficiently.”
Modern venting materials and designs reduce heat loss while improving safety compared to older, unlined systems.
Is a flue pipe the same as a chimney?
Not exactly. The flue pipe is the connector from the appliance to the chimney or vent termination.
Can a flue pipe leak carbon monoxide?
Yes. Corrosion, poor joints, or improper sizing can allow gases to spill indoors.
How often should flue pipes be cleaned?
At least annually, and more often if you notice soot, odors, or draft issues.
Fill out the form and we'll get back to you within 24 hours.
