I had an 8" RVK pulling from 3 tents...1.5x1.5x2...900x900x1.8 & a 600x900x900...all getting negative pressure so your 10" box fan will be fine, as will the 8" for an intake...I would consider getting a controller for the fans though as more control over a large environment. My 1.5m is still packed away but the RVK is now on 2 tents at half power
400 MH until they're a week old or so then switch to the 600
I had 10 plants (photos) in the 1.5 but it was maxed out...got a bit carried away with myself
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