Air Intake flwoer room--please comment

In my flower room which is a open basement 15*12*12

Does my air intake need to be outside air or can i draw from another room threw a hole in the wall?

My concern is that outside air in the winter will be very cold and sure the 3-- 1000w hoods are going to produce alot of heat but pumping in air ranging 30 degree to subzero when it gets cold will make it even harder to control my enviroment which is already hard to keep within a 10 degree range from lights on and lights off on a 12/12 schedule.

Also when lights are off for 12 -- how often is it necessary to clear the room via exhaust and replenish with the intake.. Once a hour for 15 minutes? Once every 3 hours for 15? Not at all? When the lights are on, I plan on having the exhaust and intake running for the entire 12 hours

I am very greatful for any and all input!!

Thanks

Depends on how many plants you are growing in that space.

yes u can use inside air ...........if u can u want to use air that has been scrubbed clean of smoke and all that other stuff ............u know a hemp filter

if u have a window ac unit ....the water that drips will have weed scent to it so make sure u plant hot peppers or some strong smelling flowers in that area to mess with the dogs (jasmine is the best flower they use them to pack and smuggle with )

your CF (cubic feet) is 2160 the normal rule i was taught was u want the room to clear out every 5 mins ( 5 mins is the maximum) if u can best to shoot for every 3 mins
so 2160/5 = 432 cfm or 2160/3 = 720

so u need a fan that is atleast 432 cfm rating ........better choice is a fan that does 720 cfm .................this is what u need to have as a exhust....it will drawl in the air passively if u want u do not need a intake fan ...............u can use a intake fan to decrease the heat faster if u want but u need to match it to the same CFM as the exhust

CFM stands for Cubic feet a min

side note my own exp ........u want to buy insulted ducting to advoid heat transfer into the air keep it cooler....and never get the ridged ducting u want the flexble stuff much easier