def. read jackdawacks post on the daytons ,
i'm a firm believer in vortex or hurricane fans . i have 3 of them . 2- 630 cfm hurricanes 1 pushing / 1 pulling thru my cooltubes , and a 450 cfm vortex for my carbon scrubber .
important things to consider before making your purchase
1- daytons are noisey
2-hurricane / vortex have like a 5 or 10 yr. warranty
3-daytons can't run a carbon scrubber effectivly as jacks thread points out they're not completely sealed .
just some points to ponder
peace
xcrispi