I’m up here in Alberta Canada fighting 20 degree and 29% RH. This is what I have done to maintain a fully auto system for up to 10 days at a time.
I pull the air in from top of tent through a lung room which I have set to 25 degrees 55RH , a 110 CFM fan feeds through bottom hole into main grow room, the inlet of the grow room has a 25 litre tank of water sitting with a nowex cloth draped over it, it fills the room and some air goes through my 6 inch exhaust fan which is set up with a auto on off function when humidity lvl go above 70%.
The other portion of this air goes back through a 4 inch passive return going back into the floor of the lung room close to the outlet of the lung room. It seems to be adjusting needed to maintain perfect temp in the grow room. Took a lot of planning and figuring out due to being out of town for such a long time. How do I create this journal thing to keep you guys updated ?