I get a lot of dust in my house. I noticed the front panel on my furnace is not even close to air tight. I can see through gaps and holes directly into where the blower is (which is directly over the air filter). So the blower is sucking in some air from the return line and through the air filter, but a lot is coming through the gaps in the panel. Should I somehow seal this panel better and force all air to come from my air return vent which is located in the center hallway of the house? I don't understand this design of a furnace which takes no care in keeping dirty air from the garage out.Thanks,DaveL

The message was a little confused, so I might be off base here. There are two air supplies in your furnace. One supplies air to the house and the other supplies air to the burner. You don't want your burner to be sucking air from the vents and a lot of times the intake vent draws directly from the outside.

Furnace sucking in dust from garage?

Mar 04, 2007 22 Replies

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TomC 19 years ago

My son was having problems with his printer; ink splotches etc.. Opened it up and it was full of dust. Cartridges were dragging ink soaked dust balls all over. Seems like the open paper feed feeds more than just paper. ;-) TomC

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mm 19 years ago

That makes perfect sense. Didn't think of that. Although the guy from Atlanta didn't seem to think that was the law everywhere.

And there must be 10's of thousands of furnaces in garages in Indiana alone, built prior to any law.

Why would air or CO in the garage, that is mixed with oil or gas and burnt in the furnace, get into the house? Is't the heat exchanger meant to separate combustion air from house air?

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Just Joshin 19 years ago

Metal tape?

tom @

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