Reply by JohnDon

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Posted on hf 1hp dust collector ???

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159 posts in 2249 days

#1 posted 02-25-2021 11:45 PM

Agree that 4” will offer less resistance to air flow. However, you could have problems with using 4” for a vertical (updraft) run- say from a tool to a ceiling run. You’re fighting gravity, making it hard to move larger (heavier) chips.

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