Skidmarx
Well-Known Member
Looking around forums theres quite a difference of opinion on inlet sizes. when you cut, just do it smaller that way you can always increase it later.
If the rule of thumb is complete area air exchange in 3 minutes you could do a smoke test with a kids coloured smoke bomb?
If the rule of thumb is complete area air exchange in 3 minutes you could do a smoke test with a kids coloured smoke bomb?