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All know that when the mercury rises, nights become difficult for those who don't have air conditioning or don't want to turn it on because it makes it hard to breathe.
There is, however, a fan trick that can provide relief on a hot night of stifling heat. It is the cross-ventilation or heat extraction technique
All you need is a floor fan that can be placed "face up" to an open window. So instead of having the fan blow directly at us while we're lying in bed, the secret is to turn it so that it "faces" an open window.
New Zealand-based environmental design consultant Nelson Lebo recommends placing the fan on a shady side of the house facing the window once the outdoor ambient temperature drops below that inside the house.
This technique activates cross-flow of air where essentially warm air is channeled out of the house and cool air is allowed to enter.
For Nelson Lebo this method is more practical than placing the fan in front of us while we sleep, a practice that dries out the nose and airways, and can be annoying because of the noise.
Source: ygeiamou.gr
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