Grow Room 4ft wide x 12 foot Long x 7 foot High Split for Veg and Flower

Hello

A couple of questions and looking for suggestions. As the title says I am building a room 4ft wide x 12 foot Long x 7 foot High Split in the middle for Veg and Flower.

My question is Air Flow / Temperature control. The room is in the attic. The back wall is to the outside. My idea is to have the out let air on the flowering side (lets call that the Left) vented to the roof. The Inlet would be on the Veg Side. With a 'hole' between' the veg and flower side. The theory is the one fan is going to pull the hot air and sweet smell out of the flower side and pull air from the veg. Questions:

Should the inlet air on the Veg side be on the floor or ceiling? Or doesn't matter

For the hole betwenn the rooms I was going to do an offset (One on the bottom of the wall one at the top) the thought is to stop the light from passing through. Question 1) Would this work to stop the light from coming through (I would paint the interior of the wall black) and if yes What side should contain the bottom hole? i.e does it matter if air from teh veg side is moving from Bottom to Top or Top to Bottom within the dividing wall

How much Air Flow (CFM) do I need?

For heat removal it would seem better to put the filter at the end and push through. This would allow direct venting of the light but Im thinking of hanging the inlet filter next to the backside of a 600watt HPS light to pull out the heat. Would this work or should I stay with venting the light through the hood

Also - If your familiar with what Im trying to do and have a better suggestion Im all ears
 
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