Cool, youre not running LibreELEC on this Pi then?
My backup plan for additional cooling if needed, is simply to use a 'cooling fan pad' like this.
https://www.amazon.co.uk/gp/product/B0C…Z8RHG3G6K&psc=1
Just put the pi in the FLIRC case on top of it and youve got all that surface area of the case, combined with active airflow.
I am running LibreELEC on this raspberry pi 5. I have decided to cut down on as much devices as i possible can, and bake it into one device in total. At the moment this is working kinda good, in the future when i am going to expand to a bigger filesystem it's going to create some problems and i will be forced to run two devices. Mostly because LibreELEC does not support raid, and using raid over USB is not a good idea. I could build a sata NAS out of it with some additional plugin hardware for the raspberry pi devices, but then the bottleneck would still be LibreELEC's lack of raid, LVM and whatnot.
I am running the stock fan cooler on my RPi 5 with some pibow case. The ninja one to be more specific.
Pibow Coupe 5 (Case for Raspberry Pi 5) – Ninja (pimoroni.com)
However i believe that the flirc case would have been better regarding the sound level this thing can create sometimes, with the caveat that metal cases causes a lower performance for the Wi-Fi connection.