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| General Indoor Growing Lighting, mediums, feeding, efficiency and more. |
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06-27-2008, 03:06 AM
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Registered User
Join Date: Jan 2008
Posts: 553
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fan/ventilation help
So how many cfm's should i have for an exhaust with a 400 watt hps/mh light thats in a 4wX3dX5h? I want to get all my ventilation in line before i buy anything. Heat is my biggest concern. Im going to be making my grow box out of 2X4's and plywood, and either painting it flat with or with mylar. Any tips on CFM's needed? Also my light is not air cooled, here is my light:
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