![]() ![]() The air intake is located inside the house (usually a vent sticking out of the furnace) so it’s actually drawing air from inside the home. Older furnaces - say about 12 to 15 years old and older - don’t bring in fresh air from outside. You might think that the furnace is bringing fresh air into your home, but that’s not always the case.Ī furnace has two vents: One that exhausts old air inside the house outdoors, and the other for air intake. ![]() This advertisement has not loaded yet, but your article continues below. ![]()
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