I never said it wasnt true, I just have never read anything scientific backing it up......Its just bad advice telling people they can have higher temps with C02, some people get the wrong idea and cook their plants by keeping them higher all day, every strain is different so keep a close eye on them for stress when your venturing into high temp areas.

And I only let my grow get to around 88-90 MAX, but it never stays that hot longer then 3-4 min before the fans kick in.