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G6Tanuki · 28th Apr 2019, 2:58 pm

One trick I've used in the past is to wire two 230V fans in series, so they run slower/quieter but still provide a worthwhile degree of air movement.

[You can then use a thermal-sensing device and a multi-pole changeover relay to switch them so they each see the full 230V when the temperature rises].

28th Apr 2019, 2:58 pm	#7
G6Tanuki Dekatron Join Date: Apr 2012 Location: Wiltshire, UK. Posts: 14,007	Re: UPS in a wooden cupboard One trick I've used in the past is to wire two 230V fans in series, so they run slower/quieter but still provide a worthwhile degree of air movement. [You can then use a thermal-sensing device and a multi-pole changeover relay to switch them so they each see the full 230V when the temperature rises].