So, I found this little Fan (it should be at least 10 years old), which was powered by some buttons and I had to get up from my bed/chair/whatever I was sitting on just to turn it on/off or to change speed (it has 3 speed).
So I came up with this idea of turning it off/on and changing speed with a simple IR Remote, obtaining a lot of comfort during hot summer days and nights.
So, I think that was a very nice idea and everything works properly.
Obviosuly, you can use that approach for every household appliance you have in your home, hope you will find it useful!
Have a nice day :)
Just one thing: YOU'RE WORKING WITH 220V, SO BE VERY VERY VERY VERY VERY CAREFUL BECAUSE YOU COULD SERIOUSLY HARM YOURSELF.
I used a 220V to 12V inverter to power Arduino directly from 220V.