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Jonster · 28th Apr 2019, 8:03 am

Larger fans are quieter than smaller ones as they turn at a lower RPM. You can get near silent PC fans, maybe use a couple and run them at a lower voltage to give sufficient airflow and they should be virtually inaudible.

28th Apr 2019, 8:03 am	#3
Jonster Heptode Join Date: Apr 2008 Location: Eastbourne, East Sussex, UK. Posts: 671	Re: UPS in a wooden cupboard Larger fans are quieter than smaller ones as they turn at a lower RPM. You can get near silent PC fans, maybe use a couple and run them at a lower voltage to give sufficient airflow and they should be virtually inaudible.