There are no regulations that hinder me to buy any AC I like.
I bought a mobile AC, like a lot of smaller shops in the cities do it.
I just looked that it has a high EER and COP to do myself a favour (smaller bill, and more silent when not needed on max.)
I'm right in the middle of the EU.
I didn't have to pay any extra taxes, so I don't know what that article is talking about.