Hello . I live in an apartment on the 4th floor in a block made of a large panel. From spring all windows must be open because it is impossible to withstand such stuffiness and temperature. My wife and I decided to buy air conditioning or a free-standing air conditioner ..... and here is the problem because air conditioning costs about 5,000 plus different approvals from cooperatives, etc. And the air conditioner costs about PLN 1000. and now we have such a dilemma in what to invest. What do you propose ??