My EX2 was noisy so I opened the lid

my NAS was noisy, fan constantly working even in idle, then I opened the lid and boom after few minutes 0RPM!

It pulls air from behind the case, make sure there’s space to flow cold air in

are you sure it pulls air from behind? how with the fan mounted like that in the front?

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Sorry, you’re right. The fan is in the front pushing the air to the back. It’s a weird design