For those who remember, Anker's original Nebula Cosmos Laser 4K projector was quite the humdinger, but there were some areas ...

It is quite misleading to talk about 22% lower temperature and meaning that the temperature was something like 45°C instead of 55°C. 55/45=1.22 i.e. 22%, but it is by no means 22%. In Fahrenheit ...

The running gear for this build is nothing fancy; it’s just a standard thermoelectric cooling module and a fan. The trick was getting the airflow over the module right. [Ben] uses two air inlets ...

and are typically used for PV module cooling at the research level. The system is inexpensive and does not consume energy, and it has self-recovering properties, making it highly versatile.