I already know how to vent a mining room after many different attempts. The question about the hybrid's is for future build outs in a small space.

I guess the answer is it makes no difference which gpu's you use (hybrid or air cooled) as far as the room temp is concerned.

I'm a little surprised by this as you would think that the gpu processor running cooler would relate to the hybrid gpu not giving off as much heat. The gpu processors are where the heat comes from with these cards.