I'm going to improve this design to be more ecological and self-sustainable. Instead of 2 sets of Li-ion batteries, I will install connector for input of electrical power. When it is really hot, what do we usually have in abundance? Yup, the sun-light and sun-heat. So, we can connect photovoltaic power converter (solar panel) to this portable air-cooler and have it powered by the same Sun that heats up the air which this device cools down to a more human-friendly temperature. ;) Actually, we can also keep the batteries, too, in case there is an overcast (clouds - no sunhine) and the air is still too hot for a while. ;) Thank you very much for sharing this with the "community" that we all are!

Wow......cool and very nice 😄😄👏👏👍👍 💪💪💪💪💪💪

Wow. Very awesome simple tecnology.

Is it important which grass is used in the grill? Do you have to change the grass from time to time?

What are the materials called