So, I'm thinking of venting my dc to the outside, and I'm wondering about a few things. I plan to run a cyclone, either a thien style top hat, or an oneida, with the blower from my 1.5 hp dc after it, so I will be pulling from the cyclone. I would then push the air outside, sans filter. I may put in a wye, so I can choose between the filter, and the outside, so i don't lose too much heated or cooled air.

My question is this. Would I lose a significant amount of cfm's if I put 2 90s in about a 6 foot run? I would likely put the blower over the top hat, or cyclone, to keep those runs as short as possible.

Thanks, as always.