Gas Furnace Chimney Requirements

Proper furnace water heater venting is an extremely important issue which depends on the performance of the house chimney chimney flue or other exhaust assemblies.

Gas furnace chimney requirements.

Purchase the correct size metal. A review of the international fuel gas code venting tables should be checked before venting into any chimney. A 90 furnace should never dump flue gases into a chimney. A conventional natural gas furnace will vent the dangerous combustion gases through a simple vertical exhaust system that is attached to the furnace.

Sidewall vent direct vent direct exhaust systems for oil or gas fired heaters. Direct vent chimneys fireplaces. A gas furnace chimney plays an important role in the functioning of a gas furnace. In fact both the chimney and furnace go hand in glove and function as a system.

Chimney size specification requirements for chimney flues and vents diameter height etc flue diameter and height requirements for category i draft hood and fan assisted appliances. Btu input maximum ratings height dimensions other factors. Height clearance requirements for chimneys how high must a chimney be what other chimney clearances are required for fire safety or function outdoor height requirements for chimneys rooftop chimney distances clearances. The chimney s role involves driving the system by ensuring that the flue gases are exhausted from the stove.

It also at the same time pulls air into the stove. Questions answers about chimney height clearance requirements to comply with building codes and fire safety chimney height chimney. Most old gas furnaces use such a mechanism while modern furnaces use the b pipes. Furnaces with an afue of 90 and greater use special venting material such as pvc or stainless steel.

The conditions explained in this post also apply to the wood burning appliances. The exhaust system typically uses metal venting often routed into a chimney stack to exhaust the combustion gases created in the furnace fire chamber. They can t all rise to the top of the chimney so some of them backdraft through the vent pipe itself and enter the home s crawlspace. Measure the distance from the furnace vent to the chimney.

Tables of metal masonry chimney flue vent sizes vs. Guide to choosing installing troubleshooting through wall or side wall venting exhaust devices for heating appliances like oil or gas fired boilers furnaces or water heaters photos examples of sidewall venting or direct venting installations that are improper and or. Consequences of improperly assembled vent pipes problematic chimney flue deteriorating chimney walls can be sometimes fatal fire and carbon. When the furnace exhausts into the chimney the gases quickly cool off before exiting to the outdoors.