I’m not considering being in a very hot environment, although in the summer it gets up to 30C even in the house.
Last year, when I got my FW Desktop, I thought the fan was not running at all FW Desktop PSU Fan not running at all? Later, I started hearing it, but very briefly. So still not sure if or how it’s running, and if it’s working well. But funny thing, I think I started hearing it because it started to get dirty, aka accumulate some dust, since I got it last autumn.
But from what I’ve seen from others both here and on Reddit, the PSU runs pretty hot as it’s so small and packed.