Unker kuptong champion, high rise unit doesn't has chimney or tiles roof to allow warm air or cold air leakage for heat stack effect to happen.

For your Point 1, my parents' single story house face South West, by evening, the sun shines towards my parents' room. It's really hot in there. Besides, awning does not help as it traps the heat even though prevents direct sun light.

On the other hand, my own house double story now facing North directly. As much as I thought I can prevent those hot weather, the sun light actually from North West and did shines to my master room by evening which warms my master room. Although it is much colder compares to old house, I got no complain to be honest.