pauls340
Well-Known Member
I have a Ducane 50K btu furnace I am putting in my garage attic. Garage is 600 sq ft . It says it is also a horizontal unit which I assume means I can suspend it laying on its side. The unit was in a house so there is a 14"x25" hole for the cold air return. I am thinking of getting one of those 4" thick disposable filters and strap it over the hole. Anyone have any tips...if they have done this? Thanks