New closet grow

Using a 600w hps for flowering and a flouros for veg. got a exaust fan and carbon scrubber for removing smell. how ever i'm not sure how to get fresh air into the room. can't leave the door open will just removing the old air be good enough?

where are u growing? if a tent there should be a hole at the bottom for air intake. If your using a closest just make a small hole at the bottom (can use ladies tights as filter) - there's loads of posts here on DIY setups so check them out. Depending on the grow space your 600w will get hot so you might need a ventilation system also. Good luck

get another inline to pump air in

right but it would be impossible to pump air in. in my current set up. so really what i'm asking is will my plants die if i do not pump air in? even if i am exhausting the old air out in a carbon filter?

Fresh o2 will seep into your room as is. Keep the exhaust on, and your o2/Co2 exchange will be seamless.

keysareme said:

Fresh o2 will seep into your room as is. Keep the exhaust on, and your o2/Co2 exchange will be seamless.

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okay great thats what i thought but wanted to make sure.