An infrared photo of two people in a house, one pouring tea for the other
June 11, 2020

This is part 3 of a series on the building science behind the Neutral Pressure Plane.

If you read Part 1 and Part 2, you’re ready for some scenarios that will challenge your understanding of the Neutral Pressure Plane.

Scenario 1: Existing House, High Air Leakage

What happens to the neutral pressure plane when the winter wind blows primarily from one side? How could this affect heat loss? Moisture Flow? Indoor Air Quality?

Click on the image to see the answer.

An illustration showing the neutral pressure plane and infiltration/exfiltration in an existing house with high air leakage rates

 

Scenario 2: New Airtight House, High Volume Kitchen Fan

What happens to the neutral pressure plane in a new, high performance house with low air leakage rates when a high-volume fan is installed? How could this affect heat loss? Moisture Flow? Indoor Air Quality?

Click on the image to see the answer.

Illustration showing  the neutral pressure plane in an house with low air leakage rates

Scenario 3

What happens to the neutral pressure plane in an older house with high air leakage rates when a high-volume fan is installed? How could this affect heat loss? Moisture Flow? Indoor Air Quality?

Click on the image to see the answer.

Illustration showing  the neutral pressure plane in an house with high air leakage rates

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