Panasonic FV08VQ5 or FV11VQ5 Bath Fan Installation

Identical fan body hardware is used in Panasonic FV08VQ5 and Panasonic FV11VQ5 fans.

A story is told in Google Photos albums:

https://photos.google.com/album/AF1QipP11k1UVgEiyIWFnTbYc0mQCIPPelIxaxZBgB4

https://photos.google.com/album/AF1QipMmkm0MiNj2EXOtuyGFaQOJ1rneEVrkit3HTQc 

This installation involves separation of the fan/ motor assembly, and fan body for easier handling. It is possible to install without such separation.  


In this installation, further steps effect novel ducting of the fan through the roof:
https://sites.google.com/site/phillipnormanatticaccess/Home/pdf-offerings

Please pick document posted 4/9/2011, Replace Bath Fan.


The novelty in ducting includes roof sheathing reinforcement that would be mandatory in many installations as with the common sheathing plywood over skip sheathing, where skip sheathing may be so weakened as to not tolerate weight of a worker on the roof. A further novelty is an invented three-piece penetration, the 4" solid steel duct, a collar assembly for water-tight integration with composition shingles, and the roof cap seated only under top-course shingles.

Panasonic FV08 VQ3 Bath Fan

Panasonic's instructions are here. Instructions do not consider the most common need as remodel, cutting through existing ceiling drywall. Here is my way, as a Google Photos album . It is shown in contrast to found  weak and leaky installation, that is probably very common.