Odors are backing into the bathroom after installing the whiperfit
We removed the exsisting nutone fan and replaced it with the Panasonic whisperfit. We are getting odors in the bathroom when the fan is on and also when it's off. I poured smoke underneath the fan to see what direction the air was moving and indeed the smoke traveled out however, it seems that not all of the air is moving out sum of it backs up into the bathroom. Can anyone help?
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I just installed one of these; the directions were not really helpful, and I'm fairly handy doing these things. Anyway, the 'specs' say this is 2 sones, and mine is pretty quiet. I did have to tighten the acorn nut that is under the light bulb, that holds the light fixture to the rest of the unit pretty tight. My noise was coming from vibration, not the fan 'noise'.
It is really easy to change the motor yourself. It is about a 15 minute job. You just need to find your model number and then you can buy the complete motor assembly. https://www.centralvacuumstores.com/model_number_help.php
I'm guessing that water isn't splashing up on this fan's motor, so the moisture that is causing the rust must be water vapor. The exact same water vapor that the fan is supposed to be removing. I have two suggestions before replacing the entire fan. One is to make sure that the ducting that carries the moist air out of the bathroom (and preferably out of the house altogether) is free of obstructions and that the fan can actually do it's job. Second is to actually run the fan, and run it a lot longer than you probably are right now. If it is running while you are in the shower and then you turn it off after you leave the bathroom, it can't possibly be removing that moisture. I'd invest in a countdown type timer and replace the existing switch with that. Set that thing for 30 or 60 minutes when you get in the shower and let it turn it off automatically.
If you are not very handy I don't think I'd tackle this project. There's going to be drywall cutting, backing to install, attic crawling, wiring, ducting to attach, proper insulating. As an electrician I've done this sort of thing in between 1 and 2 hours, depending on how smooth things go. If you find somebody you trust that's done it before who is willing do to it on the side for cash you're looking at $25-$60 for labor. Is it worth it to you?