I have an Burnhan furnace model BGH 125, and I would like help on finding the filer house, because for some reason I have not located it, and also, my furnace is putting out blk dust in my basement as well as in the other rooms in my house. So if anyone can help, I would be very thankful. Thanks... Wil

No place for certain,, could be in bottom of furnace,, could be inside the return,, could be between the return plenium and the furnace, could be inside the return vent inside your house,, but it definitely sounds like it needs to be found and replaced,, soon very soon