High Efficiency Furnace Exhaust

They include a second heat exchanger that reclaims additional heat from the system s exhaust gases before they are vented away.

High efficiency furnace exhaust.

If not installed correctly or checked regularly problems in these pipes can affect the operation of the furnace itself. It is classified as type bh venting. As was noted previously the exhaust gases from a high efficiency furnace are much cooler than a conventional furnace. The pvc pipes are used for air intake exhaust gas and to remove the corrosive condensation resulting from the combustion process.

Other aspects of high efficiency furnace venting. In a great majority of cases plastic piping is used to vent high efficiency equipment. A conventional furnace vents these combustion gases through a vertical exhaust system that is attached to the furnace. When these gases meet the cold air they condense and create condensate.

These pvc pipes are connected to the furnace and expelled outside. 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. After the first stage the hot exhaust gasses are cycled through a second combustion stage resulting in exhaust with very little heat. 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.

This high efficiency venting system must be installed when you install the new furnace. High efficiency condensing furnaces have two stage combustion to extract as much heat energy as possible from burning gas. 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.