I love how that breakdown says the fan is "giant"
The fan and heatsink should be much larger so it can run slower and quieter.... its so tiny it has to spin up rapidly, and to like 10 million rpm to cool it.
It would be extrememly easy for you to swap out if you have any hands-on experience with electronics, building computers, etc? Just need to pop off the feet, use a t-10 torx.... the fan make and model will be on a sticker on the underside. Find something close at any of the parts stores on the internet. Might have to cut the plug off of the fan in the stream and use it on the fan you buy, depending on what that connector is... then bolt it all back up.
-Roamio Pro/Slide Pro
-Stream (Gotta go unplug the sucker one of these days!)