Setting up New Grow area

Hello I could use some help with my new grow area,

I have 2 rooms next to each other, 8 x 13 and 19 x 13, small room has a 600mh, 8 bulb T-5 and small clone tent. Large room atm will have 2) 1000hps and 1) 600hps

I have 2 questions,

Can you put a 4 or 6 inch fan at the start to push air thru 6 inch pipping and at end pull it thru filter and to the outside, this is for the air cooled lighting.

Also for fresh air in, can it be passive 4 inch hose or would it be better to attach a fan to force more in?

Appreciate any input

Peace

So you are saying you want to filter the air coming from the lights?

No I filter the out going air, helps with smell. I have negative air flow its all pulled out.

My question is can I use for the air cooled lights 2 fans inline to push and then pull as its going to be 28 feet long, will have a second air inlet for incoming fresh air, does it need to be passive or need to be fan forced.

You are going to want fan forced fresh air for that size room