Really I dont know what to think... I brought the unit down to the floor, ran it with no ducts to be able to hear any high pitch hissing noise, I heard nothing unusual... That of course doesnt mean the bearings are fine but Im rather frustrated to have to spend $250+ on a $500 machine because the manufacturer decided to trick the consumer in replacing almost everything but the outside casing.... Seems these pieces of junk are like cars... You want to replace a $10 part but you end up replacing a $750 assembly.
Im really not into that. Plus I was impressed by how clean the inside of the unit is.. After all those years with a smoker like the previous owner, I was expecting nicotine build up everywhere and lots of lint/dust/crap.. As far as I can tell from the inlet/outler pipes, nothing like that. See pics. The filter must be really efficient...
On top of that, I am not confident the dis-assembly will go that easy. There are about 12 screws on each sides, plus almost as much on both ends... Like the exterior panels were holding internal components.. Im afraid the thing goes like a collapsing castle and I end up with an unbalanced motor/fan assy and need a shop to rebuild it which will cost probably as much as a new one..
They really make these things like disposable pens... Any way you want to look at it, you probably end up replacing the whole thing..
If someone would care to bring their input on their air exchanger experiences, please do so, but unless that happens, nothing here will happen. Ill deal with the failure when it happens.