Have you tested temps when running PIFI?
Is it necessary for additional cooling like a case with a fan?
Can I get by with just a case without a fan?
I’d say to make sure to use the recommended power supply (min 5v3a for Raspberry Pi 4 and the 27W one for Raspberry Pi 5 - especially important if using with the PiFi USB adapter which has additional power draw) so I’ve noticed it’s definetly cooler if the power supply is good enough
I don’t personally use it with a fan and mine doesn’t run too hot - would depend I guess on usage and case etc too