Needing a good UPS to keep The Works going here in Spain during frequent power outages, I bought a large Trust UPS with a 40 minute battery. Great !
Unfortunately the Trust UPS has a cooling fan which is wired across the mains input and is (a) VERY noisy and (b) runs all the time (even when I turn the UPS off) and (c) despite dismantling 90% of the UPS, the fan is located in the other 10% and can't be reached to install an off switch.
It is so loud I've had to build a silencing cover with air duct. And no, I can't hear my PC any more - sound drowned by the Trust UPS fan.
P.S. Trust do not make this model of UPS any more.
