Could anybody explain to me if I open two windows in my home, when there isn’t any wind outside, why a cross draft occurs and would there ever be an instance where a cross draft couldnt happen even if its windy?
Thanks so much!
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In addition to what’s already been mentioned, it’s very rare for there not to be any wind at all. And even 1-2 m/s, which feels close to nothing, will create a pressure difference between two sides of the house which can translate into more wind through a small opening.
In addition to what’s already been mentioned, it’s very rare for there not to be any wind at all. And even 1-2 m/s, which feels close to nothing, will create a pressure difference between two sides of the house which can translate into more wind through a small opening.
Also keep in mind:
* Any wind hitting a face of the house with a window either had to go through or around the house, whichever is easier. That can cause a disproportionately large draft compared to wind speed depending on the shape of the house.
* Any wind blowing past a sheltered window will create a negative pressure, pulling air out of the house.
The combination of these two effects on opposite sides of the house will pull air through the house very efficiently.
Also keep in mind:
* Any wind hitting a face of the house with a window either had to go through or around the house, whichever is easier. That can cause a disproportionately large draft compared to wind speed depending on the shape of the house.
* Any wind blowing past a sheltered window will create a negative pressure, pulling air out of the house.
The combination of these two effects on opposite sides of the house will pull air through the house very efficiently.
Also keep in mind:
* Any wind hitting a face of the house with a window either had to go through or around the house, whichever is easier. That can cause a disproportionately large draft compared to wind speed depending on the shape of the house.
* Any wind blowing past a sheltered window will create a negative pressure, pulling air out of the house.
The combination of these two effects on opposite sides of the house will pull air through the house very efficiently.
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