I need to put an exhaust fan in one of our 2nd floor full bathrooms (9' x 5'). I'd like it to be quiet and was looking at the Broan QTXE080 (https://www.broan-nutone.com/en-us/product/ventilationfans/qtxe080). Since we live in northern DE and get below freezing temps in the winter, I've read that roof venting is a bad idea, therefore I was going to run the ducting across the attic to the gable side. That's about a 16' run but the joists run parallel to the gables so I would have to do a 90* bend up to clear the joists and then a 90* left towards the gable. Will this be a problem and is this particular model going to be powerful enough with those two bends to still do the job? Should I be looking at something else?