Smartin684
New Member
The contractor on my rehab project has installed a foreced air furnace (AireFlow AF92MPE050U3 92%) unit in the 20 x 25 basement. I noticed that there is only an exhaust PVC line, and not an outside air intake line. There seams to be a 3" outlet on top of the unit where I am assuming the intake line goes. The contractor says that there doesnt need to be an outside fresh air intake with this unit. I find that hard to believe, but I have been wrong in the past. How do I check if this is correct? Is this common to have no fresh air intake on these units?