cooling mono amps


I have two BATVK-55 mono block amps sitting in an Audiov Zirconia rack. They give off a lot of heat when the ac is not on. I read threads about pulling the air away from the tubes and have seen 5.25" fans on line, two configured in a 19" panel. I was wondering if one of those mounted at the back of the rack, one behind each mono block, will suffice? Should I include a thermostat? Is ther another quiet fan I should be looking at? I would appreciat your comments and suggestions. Thank you.
bgmyers
This might be the BEST of the quiet fans. Several sizes / models.

I'd get 12v fans, and dial down the voltage to maybe 9v. They'll be quieter and put NO noise to the mains and radiate little. Use a rechargeable battery.

http://www.noctua.at/main.php?show=start
look into self powered laptop coolers. i've use many of these to cool my many tube monoblocks. very quite.
"They give off a lot of heat when the ac is not on"

Are you trying to cool the room or the amps?
You can also check the coolerguys.com site, they have nice cooling solutions for home theater/amps.