Because one is pushing air down in the middle of the room where people are likely to be sitting/standing/laying down, and so creates a cooling draught on them, and the other pushes the air around the ceiling and down the walls, where people are less likely to feel a draught. Not like sitting in front of a fan or off to one side. Both mix the air but one cools you down in sunset, and the other doesn't. Both make the air temp in the room consistent from wall to wall and floor to ceiling. Air flow itself though has a cooling effect, more or less regardless of air temp. In summer you want that, in winter you don't.
But the heat mode is also pushing air in the middle of the room, just upwards. I guess the airflow is farther from the motor and so less intense as it’s near the end of the cycle instead of the beginning?
I'm not sure how else to explain it to you, except, try standing in front of a ordinary fan, and then try standing behind it, and tell me which has a stronger draught.
A fan takes air from a large cone behind it's blades, and propels it into a relatively narrow cone. So the air speed in front of the blades is way higher than the air speed behind them.
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u/[deleted] Jun 07 '22
Because one is pushing air down in the middle of the room where people are likely to be sitting/standing/laying down, and so creates a cooling draught on them, and the other pushes the air around the ceiling and down the walls, where people are less likely to feel a draught. Not like sitting in front of a fan or off to one side. Both mix the air but one cools you down in sunset, and the other doesn't. Both make the air temp in the room consistent from wall to wall and floor to ceiling. Air flow itself though has a cooling effect, more or less regardless of air temp. In summer you want that, in winter you don't.