[ 3 / biz / cgl / ck / diy / fa / g / ic / jp / lit / sci / tg / vr ] [ index / top / reports / report a bug ] [ 4plebs / archived.moe / rbt ]

Maintenance is complete! We got more disk space.
Become a Patron!

/diy/ - Do-It-Yourself

View post   

[ Toggle deleted replies ]
File: 53 KB, 512x491, unnamed.jpg [View same] [iqdb] [saucenao] [google] [report]
1794381 No.1794381 [Reply] [Original] [archived.moe]

Quick question. Im installing a new range hood with a top side duct opening of 7". All of my existing duct work through the roof is 4". I plan on slapping a 7" to 4" reducer on top of the hood. I should be fine, right? The hood cfm is 300 max with a high and a low option. Am i good?

>> No.1794391

yeah it'll be fine.
may add wear to motor if you run it on high a lot but even then who gives a shit if it goes bad in 8 years vs. 12

>> No.1794411

punch in the amount of 90's and stuff

>> No.1794683

Just make sure to do the bends at 7", don't reduce until after all the bends. Turns are the airflow-killer.
7" at 300 cfm is pretty low static pressure, hopefully the fan can produce enough.

>> No.1794694

4" is only good up to 80 cfm

>> No.1794874

Just re-run the vent pipe in 7" like a Chad instead of hobbling your poor appliance.

Name (leave empty)
Comment (leave empty)
Password [?]Password used for file deletion.