What is the term for the area in a house where indoor air pressure is equal to outdoor air pressure?

The term for the area in a house where indoor air pressure is equal to outdoor air pressure is known as the Neutral Pressure Plane. This concept is significant in understanding how air dynamics work within buildings, especially in relation to ventilation and radon entry.

In a home, the distribution of air pressure is influenced by factors such as wind, temperature differences, and indoor air movements. The Neutral Pressure Plane serves as a horizontal boundary where the pressure on either side is balanced, which can be crucial for managing air quality and ensuring that contaminants, including radon, do not infiltrate the living space. Understanding this plane helps in determining how air flows into or out of a building and can inform strategies for mitigating radon exposure.

This term is particularly relevant for radon measurement and mitigation efforts, as knowing where this balance occurs can help professionals assess the potential for radon accumulation and the effectiveness of any mitigation measures implemented.