High Efficiency Furnace Exhaust

Other aspects of high efficiency furnace venting.

High efficiency furnace exhaust.

If not installed correctly or checked regularly problems in these pipes can affect the operation of the furnace itself. This high efficiency venting system must be installed when you install the new furnace. Venting for high efficiency gas furnaces materials due to the condensing nature of a high efficiency furnace its venting must be made of a material that is resistant to corrosion. These pvc pipes are connected to the furnace and expelled outside.

When these gases meet the cold air they condense and create condensate. They include a second heat exchanger that reclaims additional heat from the system s exhaust gases before they are vented away. In a conventional furnace the hot exhaust discharge has more time to exit a chimney flue and move away from a home or business before it condenses. A high efficiency furnace uses a different type of venting system because it extracts the heat that remains in those combustion gases before venting the resultant mixture of water and carbon dioxide.

It is classified as type bh venting. In a great majority of cases plastic piping is used to vent high efficiency equipment. Condensing gas furnaces achieve their high levels of efficiency by adding another step to the fuel burning and venting process. As was noted previously the exhaust gases from a high efficiency furnace are much cooler than a conventional furnace.

High efficiency or condensing furnaces exhaust the combustion gases and bring in fresh air through pvc pipes to the outside usually routed through the sidewall of the house. High efficiency condensing furnaces have two stage combustion to extract as much heat energy as possible from burning gas. A conventional furnace vents these combustion gases through a vertical exhaust system that is attached to the furnace.