I have a marshydro old style 300w LED light. Haven't got the light installed yet. I have two 100cfm fans for intake and exhaust. I dont really understand positive air pressure and negative air pressure. Should i have 100 cfm intake and exhaust?
Submitted September 23, 2015 at 06:10AM by Stars_And_Bars_ http://ift.tt/1QXXROB microgrowery
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