Keeping A/V components in an equipment rack may be convenient, but maintaining a constant, cool temperature inside the rack is imperative to extend the life of your components. By installing the Cool Stack I Exhaust fan at the top of your rack, you"ll be able to pull heated air away from the delicate interior of your expensive components. The Cool Stack I Exhaust is triggered by excessive heat in the rack, so you won"t need to keep it running all the time.