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Automated Cooling
(feddit.uk)
Home Assistant is open source home automation that puts local control and privacy first. Powered by a worldwide community of tinkerers and DIY enthusiasts. Perfect to run on a Raspberry Pi or a local server. Available for free at home-assistant.io
Just to mention it again, through-wall is an option...
But, if overheat conditions are not that often, still might not be worth cost of installation.
Might consider a low-tech solution such as putting a bowl of ice cubes in front of the fan so the air passes over the bowl before hitting either you or equipment. 🤷♂️