Why is it that when we blow we produce cold air and when "heerr" its warm air?

Question

o"ur" - not "out"

Answer 1

Blowing air out with force removes warm air from whatever's in front of our face. It's the same reason wind has a cooling effect.

Breathing air out at a slower rate (aka "heerrr") keeps most of its original warmth, without removing the warmth that was around the object you're breathing at.

Answer 2

Air cools rapidly when its forced through a small opening this is why