I just built my first growbox (the usual: 6" intake and outtake holes, cooled hood, ducting etc.). It's 100% concealed and lightproof, but the 6" 36db inline fan is clearly audible and the noise would be suspicious to my guests (I rarely have any, but I don't ANYONE to know about my little project). It's also... 95% airtight - when everything's off, the only source of air is the intake hole.
Can I just turn the fans off (the other one being a small oscillating fan) for about 3-5 hours? Will the plants be OK?