system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why my dad points the pedestal fan outwards to cool down the house?

No idea why, but my dad faces the fan outside my window, shouldn't it be facing inside to cool down the house?
gpt
Putting the fan on you causes a breeze which cools you down. Pointing the fan out is blowing the hot air out, thereby causing negative air pressure inside the house and forcing fresh air to flow in. 
So, if it is hotter outside than in, point your fan at you. If it is hotter inside than out, point your fan out.