Gas Furnace Chimney Requirements

Questions answers about chimney height clearance requirements to comply with building codes and fire safety chimney height chimney.

Gas furnace chimney requirements.

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. A conventional natural gas furnace will vent the dangerous combustion gases through a simple vertical exhaust system that is attached to the furnace. Furnaces that vent into chimneys can be hazardous but they don t have to be. 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.

The conditions explained in this post also apply to the wood burning appliances. We give chimney cap requirements for b vents and we discuss fire safety fire clearances and other gas appliance venting details for metal b vent chimneys we also provide a master index to this topic or you can try the page top or bottom search box as a quick way to find information you need. 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.

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. Sidewall vent direct vent direct exhaust systems for oil or gas fired heaters. When the furnace exhausts into the chimney the gases quickly cool off before exiting to the outdoors.

Consequences of improperly assembled vent pipes problematic chimney flue deteriorating chimney walls can be sometimes fatal fire and carbon. 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. The chimney s role involves driving the system by ensuring that the flue gases are exhausted from the stove. A 90 furnace should never dump flue gases into a chimney.

Direct vent chimneys fireplaces. Purchase the correct size metal. 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.

It also at the same time pulls air into the stove. The exhaust system typically uses metal venting often routed into a chimney stack to exhaust the combustion gases created in the furnace fire chamber. These pipes are not only environmentally friendly for residential use but also authorized for use by regulatory bodies and insurance companies. Btu input maximum ratings height dimensions other factors.