Furnace Exhaust Fan

Since i have had the furnace replaced and now its direct vent out the side of the house i have an existing furnace flue in the area that is no longer in use 5 inch is it possible to vent the exhaust fan through this.

Furnace exhaust fan.

The exhaust fan is designed to draw out the exhaust fumes that are created when the natural gas or oil fuel source is burned to heat your home. A fan is placed at the end of an exhaust pipe that runs through a sidewall which draws out combustion gases and expels them outside. Nbk 12194 furnace draft inducer flue blower motor 1014529 119290 00sp 100011645 10011645 10011945 1014433 1014529 j238 150 1525 66529. The exhaust fan turns on first a second limit switch senses the fan is on the sends a signal to the control board and the furnace turns on.

There is either an electronic or a vacuum limit switch that turns the exhaust fan on when there is a call for heat. The fan works in conjunction with the furnace usually turning on before the furnace starts. The draft inducer helps to clear out any lingering exhaust gases inside of your furnace s combustion chamber making more room for fresh air. A draft inducer consists of a high powered fan located near the heat exchanger inside the furnace.

These pvc or cpvc pipes can be inviting to rodents and birds especially in the winter as well as insects mostly in summer looking for a home. Customers also viewed these products. If your central heating system has a furnace that s powered by gas the resulting oil which heats things up needs to be exhausted from the unit. These fans must run whenever the furnace is lit and they often cycle when the furnace is not blowing warm air because the pilot light is always burning.

To accomplish this there is a power vent with a fan that serves to release the exhaust and the fan continuously runs as the furnace is running. High efficiency gas furnaces have plastic vent pipes that extend to the outdoors to get rid of exhaust gases and bring in fresh air for combustion. One of the limit switches is locked in the open position so the fan runs continuously. Part of an interactive video.

Page 1 of 1 start over page 1 of 1. Exhaust fan should only run when the furnace is on. 4 4 out of 5 stars 55. Continue reading below our video of the day.

The rise for the old furnace flue is about 16 feet. As there is windows furnace vents gas lines at the side it is almost impossible to add a vent on the side of the house. A furnace exhaust fan in need of repair is of particular concern since it is such a critical component of your system.