Right now I am running fresh air exchange and it is working well for the spring time. I’m able to get enough free cooling to avoid running ac and sealing things up, have everything for a co2 setup, just need to fill my 50# and adjust controls. I’m thinking I may be able to adjust my time and run 10pm-10am and continue with the fresh air as it gets warmer. I can move as much air as I need to, and not running ac would be fantastic. The season is shifting and this will be my first attempt growing indoor during the summer, but I’m prepared for just about anything. Eventually a mini split will be added, but I have a really great older 10,000btu window shaker I’ll use in the meantime.