Haven't tried that. I need a whole bunch of Y's, I'm not sure I have
that many 30 minutes available. I certainly agree about the high price
of ductwork. I am trying to upgrade from my current 4" flex hose (that
is killing the flow of my system) to 5" duct. So far, Oneida seems to
be the best price, but that is still way more than I ever expected to
pay for ductwork. Anybody know of an HVAC supplier in or near Tucson
that might have 5" spiral duct and round Y's?
My problem is not with whether I use spiral or snap-lock, my problem
is that I need 5" ductwork. My DC is a 790 CFM collector, and with
static pressure drops outside the trash can cyclone, the velocity in 6"
duct is not high enough and static pressure drop in 4" duct work is too
high -- 5" seems to be the sweet spot between velocity and static
5" snap lock is available, but probably not at the Borg. Call a local HVAC
shop and get a price from them. Probably will be cheaper than the Borg too.
Have you tried 6"? My bet is in the main run the velocity will be just fine
to keep the dust moving. Run 6" mains, 4" drops.
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