I actually bought the official case and drilled out a hole for a Pi-Fan (you can get them on Amazon or most places that have Pi's and accessories), 1 1/8". I mo

I actually bought the official case and drilled out a hole for a Pi-Fan (you can get them on Amazon or most places that have Pi's and accessories), 1 1/8". I mounted the fan on the top case and plugged it into the 5V and GND GPIO pins, and it keeps the Pi nice and cool. I'm working on a blog post and YouTube video with the full details, but it's not that difficult an operation, and I liked the look/size of the official Pi case more than a printed case or one of the thousands of knockoffs. I do agree with the parent that a fan (active cooling) is absolutely necessary on the Pi 4, more so than any before, as the CPU is not the only part on the board putting out a lot more heat than previous generations—that heat needs to move somewhere.