2 I'm planning on installing a Bathroom exhaust fan (Just a note, the port is 4") and am curious as to what kind of duct should be used. I've heard that the duct should be insulated to prevent water backflow from condensation during the colder months as my attic is not environmentally controlled. What Type of Ducting Should Be Used for a Bathroom Exhaust Fan?

Context Explanation

Trying to decide on placement of bathroom exhaust fan. Primary purpose/concern is moisture from shower. Bathroom is 7'x10' and I've purchased a 110CFM Panasonic Whisper. It says it's rated for &quo...

Insight Material

11 I'm finishing a new basement bathroom and just tried the exhaust fan, and it appears to be blowing the wrong way. I can feel air blowing downwards, and the horizontal backdraft fins on the outside exhaust vent (it's just above ground level, on the house wall) are fully closed. This is a brand new NuTone fan and it came with the metal box. exhaust fan - How can i remove / open up this Broan bathroom vent fan ... 1 I know some fan motors have ports to oil but many do not (bathroom exhaust fan, bathroom heater fan, regular house fan, etc).

Final Conclusion

How do you oil the ones that do not have ports? Specifically, where do you put the oil 3-in-1 oil? Also, this bathroom exhaust fan was originally installed in the early 80's, so I believe judging by the, rapid-moose-making-love-to-an-elderly-non-consenting-bear, type sound coming from the motor that it's about time to install a new one. Discovered my bathroom exhaust fan has no ventilation, what do I do? The "best" approach is to take the shortest straight path to get the exhaust air out of your house. Generally that's via a roof vent.

Check out this for a little more info. Your plan A, two bends and out the gable end is fine as an alternative. 10 feet is not a very long way for a bathroom exhaust vent. If possible, use a rigid vent to avoid sagging and possible condensation build-up.