Unistorm Raspberry Pi 4 Model B Aluminum Case with Dual Cooling Fan Metal Shell Black Box for RPI 4B (With Dual fan)

This is to be used with a RPi4 running Freeswitch PBX software which is a medium processor intensive program. Thus keeping CPU temperature down is important for reliability. This fan does that. One point I did have trouble with is the included self-adhesive heatt conductive pads. These are quite thin (good) but the peel off strips protecting the adhesive are difficult to separate and I did tear one of the pads in the process. However sufficient pad was saved to stick to the appropriate chip case. I will probably buy this again.

Really good thermals... only bad thing is the silent fans have started making noise!

Would have given this 5 stars if I could attach the fans but unfortunately the supplied screws are too small and no screws in my toolbox have the correct thread - disappointing. Not sure if this is manufacturing defect. I've had to settle with double-sided sticky tape for the time being

The Pi4 has a reputation for running hot, although in my experience it's the Pi3B that runs a few degrees warmer. I started using this style of heatsink/cooler with the Pi3B and found it very effective indeed. It's just as effective with the Pi4. I use it on a Pi4 backup NAS, currently idling at 30C, on a Pi4 NextCloud server, 28.2C. I also have a Pi3B test box, with the same style of cooler, which has just finished a compile hitting 100% CPU and that went up to 58C. It's now idling at 32C. If you need to get at the slots, ports and pins, this case is ideal. I think it looks tidy and better than a bare board. It was the neat, utilitarian look of them that first caught my attention. The cooling is excellent and the fans are very quiet. I know that sometimes they can start to whine (like any small fan), but if a blast from an air-cleaner doesn't fix it, replacements are available all over the place from £2.50 upwards - and they're dead easy to install.

Managed to reduce heat on my pi

Using this as a local NAS, with a 500gb chip in a USB socket and a 6tb external drive connected. Running Samba so the MS boxes can map drives. The case is fine. Fans are quiet for now. I'm not over clocking the Pi, so heat really isn't a problem. This seems like a good choice.

No issues with installation and the fans are doing a good job keeping the pi 4 cool.

Great heatsink. Comes with the thermal pads. Easy to install. Comes with tools needed. Mind there are two types of style to the screws. There are 4 of one kind for the heat sink then 8 of the other for fans. All screws are the same thread and work anywhere but the looks get skewed if you don't pay attention. Temps peak at 42c under 100% load. Settles at 39c. (Tested in a 3d printer.) The airflow channels under the fans seems a little bit restrictive but the fans aren't overly forceful either so I'm considering placing it in my milling machine and cutting additional airflow channels under the fans to improve airflow for enclosed environments.

one of the fans is nice and quiet, the other one is quite noisy and somewhat annoying. Tapping on the noisy fan fixes it for a while.