Comment by internetter

With laptops, there’s no match for the thermal efficacy of the MacBook. That’s why you can only find laptops with mobile CPUs. If you buy a Mac to run Linux, get an M1 or M2. Be aware of the caveats (not all features are supported). With any laptop, you could in theory undervolt the CPU and screw up the fan curves to make it effectively fanless.

If you are ok with a mobile CPU, a lot of chromebooks are fanless and you can slap Linux on them, but they’re slow.