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Best insulation for sealed grow shed underneath? Shed is foamed and sealed with a mini split and co2 system. Floors are sealed with kilz and epoxy. Want to insulate under the building for the winter time. The foam gun would be hard to use at that angle so what are my best options ?

Doing a sealed room. Just foamed the walls and installed mini split. Was told I will need to paint the spray foam.. wondering what the risk of not covering it is and what the best option is for a grow room? If paint what kind ?

10x16 shed I am foaming and ducting out a main 8 inch metal duct with 4 6inch tap offs for 4 tents. My question is what size passive intakes should I cut in the shed if I’m exhausting from each tent to a main duct out of the building. The exhaust fans will be 2 4” and 2 6”

Grow room help with ventilation Doing a 10x16 building fully insulated but not completely sealed per se because I don’t want to start dealing with co2 yet. I will have multiple tents within this building so I’m wondering how to have exhaust set up for the actual building. I am going to have...