Furnace sucking in dust from garage?

[TomC]

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

[mm]

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?

[Just Joshin]

Metal tape?

tom @