A short YouTube explainer (by Derek Cole) giving a practical tip about ceiling-fan direction: set the blades one way for air conditioning (cooling) and reverse the blades in heating season so the fan pushes rising warm air back down into the living space. The clip states the physical rationale succinctly: "heat rises."
It does. You're supposed to have it one way on air conditioning or when it's hot outside and down flow on heating. The reason is because heat rises. So in the fall and the winter when it's cold, you want, obviously, the warm air to come back down to living space. So that's why you have a reverse function on that fan, because then it pushes that hot air back down.
How to Prevent Mold and Odor in Your Air Conditioning System with UV Light #shorts
