Submitted by wickedsweetphat t3_zxk9de in DIY
tebrown t1_j20ye8o wrote
How big are the openings on the cap? If you are going a larger diameter cap, it will reduce the pressure significantly so it is possible the fan simply cannot push the air out past that pressure drop.
wickedsweetphat OP t1_j20zyql wrote
I believe the cap diameter is 8" and the vent ducting is 4" diameter. Any way to test to confirm your suspicion?
[deleted] t1_j213nfh wrote
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