My first grow I was able to run my 590 cfm fan that exhausts my light/room on 24 hours. Now I am trying to keep temps high in my room so I tried turning off my exhaust fan while my light was off, I intake clean warm air 24/7 at like 350cfm. Running my exhaust fan 12 and 12 did a pretty good job at keeping temps as high as possible but my buds didnt fatten up like they did last time. What's the deal? I think by doing this while they were halfway through bloom may have stressed em too... What does RIU think? I think it plays an important role in simulating nature and may have harmed my yield because it was too 'fake'.