I am disappointed to find that a replacement blower for my Kozyheat Z42 is $ 325. Only one side has gone bad (squealing) - still it's best to probably replace both at the same time. I cleaned it and oiled it. The bad one - the motor shaft moves about an inch where the other is tight - so I know the squealer has a bad motor. I have been searching and it looks like the blowers are fairly simple and available from various vendors generic for around 60 - 80 a piece. I can easily install them onto the existing bracket and reuse the cord and thermostat. Spending 150 vs 325 appeals to me. It currently has 2 fans pushing 75 cfm each total of 150 cfm. I am operating now on just one side (disconnected the squealer). Luckily - it went bad during the evening and not at 2 am. I was wondering: If anyone has replaced theres before with non factory matching parts. If anyone can suggest a inexpensive vendor for blowers. If anyone has ever bumped up the CFM output? I saw one that puts out 360 CFM - that would be awesome!