I have to agree with Dannyp1: I would fit a heatsink, and some sort of fan, especially if I overclocked my accel. ... I added a fan to my A1200T 'just to be safe' and it's only a 50MHz '060 ....
Now if someone made new accelerators for classic Amiga's, that might be a different story..
There are some tiny DC fans made for e.g. Sega Dreamcast that could probably be fitted with a little creativity...