I have a high performance range hood that I need to vent up and then
sideways about 10 feet to the outside. The manufacturer requires a 7"
round duct. In order to use a 7" duct I'll have to vent it up, put in a
90, run it across the top of my cabinets, put in a 45 to get in front
of a joist, then another 45 to get back straight, then a 90 up, and
then a 90 to go to the outside. If I reduce it to a 4" duct, I can go
up, put in a 90 and go straight to the outside.
So, which is the lesser of the 2 evils? Any help would be very much