Tuesday, July 07, 2015

[shdcitzl] Point the window fan in

Pointing the window fan in or out will (I think) be equally effective at moving air through the window.  We assume other windows are also open: it is equally tricky either way to figure out through which other windows the air will flow.  I suspect that both ways are equally effective at making the indoor temperature the same as outdoors.

However, pointing the fan inwards creates a small area immediately in front of the fan with high speed air.  A person standing there can cool quicker because high speed air helps perspiration evaporate.

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