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Do you have a diagram showing effect of winds on the pressure inside the house? If wind is blowing from the south, is a vacumn created inside the south or north wall of the house?

Bryan Bargen June 8, 2018, 5:20 p.m.

If the wind is from the south, where and how are positive pressures created in the home?

Responses (1)

Ecohome June 27, 2018, 3:50 p.m. Reply

 

Unfortunately we don’t have any diagrams to clearly depict the effects of wind pressure on a home. Were you looking for a diagram for your own understanding or for educational purposes in a presentation? It’s a great question, and there are many variables at play so I will try to lay them out clearly.

A wind from the south will create a positive pressure on the south facing wall, forcing air through any holes in your building envelope. That will create positive air pressure inside the house, and force air out other holes in your building envelope.

A vacuum won’t be created inside the house, but sort of outside the house, on the north. That south wind will create a negative pressure outside of your north wall, so more than just being an issue of increased air pressure inside the house, wind will create a negative pressure on the opposite side of a home and draw air from that wall.

Air pressure in the home will also be affected by any mechanical exhaust you have like a central vac, stove hood, bathroom fans, etc. The natural stack effect of warm air rising will create a convection in the house as well as create a positive pressure at the top portion of your building enclosure. How much the wind effects your comfort and efficiency will depend on how airtight your house is. Best regards. 

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