Cool it!

Have not had a fan which is very bad for 40 years.Good luck though!!

Ebm,
I understand.... I just aquired a class A, Krell Amp. The previous owner had it a ac cooled ventilation set up. I'm aware these types of amps create substantial amount of heat. My room is temperature controlled but with the summer months  I  wanted to properly assistance ventilation.. I'm aware that high heat and poor ventilation shortens the life of stero amplifications.

Thank You for your thoughts! 
And stay safe!

So long as your ambient room temperature remains comfortable (~ 74F) the amp will be fine. 

Not sure which Krell you got, some of them had internal fans.  Make sure it is operating.  Those are cheap to clean and replace.

Best,
E