On all of these UPS's, the inverter is going to make some type of noise. The
better ones that are able to put out more than about 400 Watts will have a
fan. Some allow you to disable the alarm. If not, you can wire a switch in
series with the alarm that is inside, if it is easily accessible, but this
will void the warranty.
What we do in the sound and production studios, is that we locate the UPS's
in another room with the computers. The computers all have fans in them, and
are also noisy. We have the monitors, keyboards, and mouse's extended with
Cybex boxes, or the equivalent. If you want the computers in the same room,
you can always have the UPS's in another room, and run AC extensions through
"Tom S" < email@example.com> wrote in message
Click to see the full signature.