Duct work help! Trying to replace an old BR exhaust fan with non-standard duct sizing...?
I'm looking for the finest way to go about replacing an old bathroom exhaust fan.
The original fan is connected to a round piece of ductwork (7" diameter) that runs straightened out up through the roof. We have an old one story home with
You can buy an adapter from most places that drummer ducting. Home Depot, etc.
Specialty HVAC shops would have it for dependable.

For the 








