Adding on to grow room

Indoor Growing Grow Room
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I Have a 4x4x7 vivosun with 2 HLG 260xl and I have 2 600 viparspectra I want to use, like to build either 3x4x7 out of foam lined and unzip side of vivosun tent and tee into 6” 440 cfm vivosun exhaust or just buy another 3x3 tent and a separate exhaust this will be for vegging or drying bud which way would you go? Thanks

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Me personally I’d add a tent and new exhaust. If you t into your current then you’ll won’t be exchanging enough air. A 4x4x7 is something like 336 CFM needed. Add a 3x3x7 to that and that’s another 189 CFM.
Edit-you could use your 440 for intake if it’s adjustable and buy one closer to 900 CFM for exhaust and T off. That would give you adequate exchange.

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Thanks randomly for the reply, My current setup have been good for temp and humidity will add separate exhaust for new tent, can I tee off for 1 exhaust to the outside?

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Yes that would be fine.

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