In my 2nd floor condominium, I need to replace bathroom ceiling and exhaust fan. Old ceiling has been removed. My contractor is going to install new ceiling. I want to replace old exhaust fan and duct work too.
I want to replace old flex plastic duct with rigid solid metal duct for smoother air flow. But I am stuck in this dilemma.
I am assuming that connecting fan with rigid duct will be easier if I install it before ceiling is in place, because once ceiling is placed, I won't be able to connect ( and seal the joint with tape) duct coming out of fan housing with rigid duct in ceiling. With some tilting even if I manage to connect both ducts, I won't be able to seal the inaccessible joint because of ceiling.
If you agree with my assumption, then it leads me to think that I should install it before new ceiling is in place, so I can connect both ducts and tape the joint. But then, my contractor has to make sure that the ceiling is installed at right level so that flanges of fan housing is flush against ceiling and the grill can be mounted flush to the ceiling. I don't have much confidence in my contractor and I don't want to end up with argument with him.
Is there an easy way to install fan after ceiling is installed and still use rigid duct work and be able to seal the joint?
I would also like to know if using rigid duct is good idea or not, if in future I need to replace the fan again, how easy it will be to push the rigid duct out of the way to remove old housing. With flex duct, you can easily push it out of the fan housing and remove it, but I can't see how it will be possible with solid duct.