I'm now in Austin, which gets very hot in the summer. My listening room upstairs is cooled by a separate HVAC system from the rest of the house, but it was still a tad warm in the summer when temps easily exceed 105F during the day and don't drop much at night.
The upstairs HVAC system was checked "OK" by a tech as recently as a month ago and was fine. Then, a week or so ago, the compressor died. I replaced the entire outside unit with the more current model that uses a variable speed compressor- what a difference! Even though the old unit had checked "OK" it wasn't nearly as effective as a fresh unit. Dead quiet too.
I do use some of those AC Infinity units to cool a silencer box for the air compressor that is part of my tone arm set up. It has a temp probe and the fans kick on (intake and exhaust) at a chosen set point. Fairly inexpensive and seem to work fine after 3 years. I have the fans set to full speed and you can hear them in the room where the silencer box is located, but I suppose if they are set to a lower speed, they'd be quieter.
I'm running all tube gear in the main system, from phono stage through amps.
