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air filtration
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  1. General Homesteading & Building
    I have done a pretty fair search of old threads. I need to figure out what I will do for ventilation. I am planing on an underground area of about 8' x 8' x 20'. Proabably 4 adults and a kid or 2. I know bigger is better but this is a start. I was looking at using a 12v system with solar...
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