In a grow tent is it best for negative pressure or positive? 600w hps 1.2mx1.2m×2m.
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In a grow tent is it best for negative pressure or positive? 600w hps 1.2mx1.2m×2m.
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Negative
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Gardro's coco grow mentored by joker the smoker
British green (29-08-18), Gaz (06-12-18)
Should be good with a 6" blower or 8" . All depends how you set up
Moved to grow room design & setup / ventilation
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British green (29-08-18), Trex (29-08-18)
If you have a filter attached to an extractor fan and you have negative pressure, the tent walls will be sucked in - this is negative pressure and means that the air leaving the tent is being sucked through the smell-scrubbing filter.
If you had positive pressure (I'm not sure how) your tent would be a balloon and you'll leave Earth's gravitational pull.
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AND (04-10-18), Easy-T (05-12-18), JamesJoyce (04-12-18), WhIpLaSh (30-08-18)
Think I might need a better fan what's attatched to my filter. As i switch my inlet fan on my tent bloons up.
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British green (29-08-18), Trex (29-08-18)
Extraction fan should always exceed the intake , if they are matching size fans or rated similar air flow the extraction fans speed , power , air flow is reduced once the filter is attached. Negative pressure is preferable as above have said to stop smells escaping, think of ya tent or like a vacuum only sucking air in , no smell can escape because it’s constantly drawing in 🇬🇧
Sent from a green and pleasant land
Bewbuds (29-08-18), grassmaker (04-09-18), M_C (29-08-18), Royston81 (04-10-18)
Bang on, always a bigger fan sucking out through a filter and a smaller fan pushing air in.
I have a six inch fan drawing out and a 4 inch putting in, in a 1.2x1.2x 2.0 tent, and the tent is sucking in causing neg pressure.
I have my oscillating fan facing the same way my air is coming in. Creating a nice “cycle” of air flow.
All the best
Trex (04-10-18)
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