[aPoCoMiLogin]

not op but was in same situation for few years as in my region A/C is somehow luxury and a lot of landlords don't mount them.

the issue with portable A/C is that most of the units needs to stay inside apartment, the cooling happens by compression/decompression of coolant, which produces heat and cold. so the A/C unit is producing additional heat that it needs to chill, which makes it inefficient. also these units are loud as fuck, most of them above 65dB.

so if you are in need, look for units that have the ability to channel cold air to the house from outside. otherwise you should always avoid portable A/C as it is really inefficient.

here's better explanation: https://www.youtube.com/watch?v=_-mBeYC2KGc