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Pressurization Principals

In this lesson, the principles of house pressurization and how they relate to HVAC systems are discussed. The effects of pressure differentials on the health of occupants, the homeowner's energy bills, and the long-term durability of the house are examined.

In this lesson, you will learn to explain the difference between positive pressure and negative pressure and define backdrafting. You will also be able to define variables in an HVAC system that cause backdrafting, discuss the relationship between air infiltration and moisture problems like mold, explain the purpose of a jump duct and explain why a duct blast test is more accurate than a blower door test

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