Search: Posts Made By: dunnit
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07-17-15, 05:47 PM
Replies: 6
Views: 583
Posted By dunnit

I don't think I wrote clearly. There's no more...

I don't think I wrote clearly. There's no more 7" flex involved. Going away.
I'm reducing (new) 8" flex, down to the old 7" diffuser boot (w/ 7"dia, 3" long, smooth connection pipe out the back of...
07-17-15, 10:40 AM
Replies: 6
Views: 583
Posted By dunnit

Thanks. The loss is only at the angled section...

Thanks. The loss is only at the angled section (transition) of the reducer.
True, but I wonder how much, ballpark?
But once the loss happens (at reducer transition), it doesn't "regain" it, just...
07-17-15, 08:57 AM
Replies: 6
Views: 583
Posted By dunnit

Loss from reducing 8" flex to a 7" boot?

1) General terms, how much CFM loss by reducing 8" flex duct to 7" connection at the register boot (12 x 6)? Quite a bit, or barely noticeable? Percent loss?

The duct connects to boot at about 60...
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