Greg1707
Senior Member
- Location
- Alexandria, VA
- Occupation
- Business owner Electrical contractor
Here is an engineering question?
I have an exhaust fan designed for a six inch duct. The length of the run is 10 feet. At the wall opening I have a four inch vent cap. I have two choices:
One, reduce at the fan and run 10 feet of four inch duct.
Two, run 10 feet of six inch duct and reduce to four inches at the wall cap.
Is there any difference in performance between these two options?
I have an exhaust fan designed for a six inch duct. The length of the run is 10 feet. At the wall opening I have a four inch vent cap. I have two choices:
One, reduce at the fan and run 10 feet of four inch duct.
Two, run 10 feet of six inch duct and reduce to four inches at the wall cap.
Is there any difference in performance between these two options?