I live in a two story, sun facing house.
During summer, and even winter, it gets very warm.
The bottom floor is an open area lounge/living room/kitchen. There are plenty of windows and a balcony there, so to keep it cool I can just open windows and doors and put a fan on.
The top floor however is the bedrooms and a hallway and it gets very stuffy up there.
How can I keep it cool? The only solution I can think is to ask the housemates to leave their bedroom doors and windows open during the day, but some may feel uncomfortable with that.
Is there another solution I'm not thinking of?