You need to heat the air in winter and cool it in summer. Some office building operators simply minimize the air exchange to show saving to their superiors. Sa

You need to heat the air in winter and cool it in summer. Some office building operators simply minimize the air exchange to show saving to their superiors. Same goes for buses in my city in summer. Drivers get a bonus for savings on gas so the aircon is turned down to bare minimum and it is suffocating inside especially as bus gets crowded. And opening windows is prohibited. Electric trams on the other hand have aircon to the max so it is freezer temperatures. One of the reasons I bike.