I was told fans in a group x class helps to circulate the air and maintain a healthier, cleaner environment. Is this not true? Are fans beneficial? I’ve tried to teach without them and I almost passed out after 15 minutes of a 60 minute class. Members think they are losing more weight with the fans off since they sweat more.
Aside from the sweat to loose weight myth (echoing Karin’s sigh here) you might point out that a moist warm environment is a great place to grow fungus and bacteria. Good ventilation is probably even more important than the fans.
I do agree with Harris that you need to make an executive decision on this. A good start is to ask the facility if there is a rule about the fans/temperature etc, and then let your students know that that is the policy and you must enforce it.
I teach yoga at a place that has one room that is shared with aerobics. The temperature is kept cooler, with which I agree. It would be more comfortable for us to be 10 degrees warmer, but it would be dangerous for them!
Good luck with this.