negative pressure vs. Positive pressure

Boatguy said:

Do you really think an intake fan and exhaust are necessary? I've never ran an intake fan, and havent had a problem.
I find it hard to believe air in the tent goes stagnant in 3 to 5 min. If it does, it doesnt seem to have much effect on my plants. My exhaust kicks on every 30 min or so to keep temps around 80

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Gardenator said:

I just said air needs to be exchanged and gave a standard amount to shoot for to garentee fresh air on your plants, my only point was bigger exhaust smaller intake garenteed negative pressure, i did not give any definitive measure to achieve this, will ur tent air go stagnant- probly not cause nobody turns light on in a tent leaves the plants under it and never checks and 90% of people leave the thing wide open when the lights on so all and all chances are not going to be a problem just shoot for bigger exhaust then intake and give ur plants fresh air to breath and put all the equipment you can outside the tent

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Amnesia420 said:

Filter, extractor in the tent for me, I think some people may have it outside if they don’t have Much room but I’m not 100% sure. Yes that’s right negative pressure your tent should be sucking in. Some people will have an intake fan on the outside maybe that’s what you’re seeing.

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