BPI Air Sealing 4

Question 1

A home has a measured ACH50 of 12 before air sealing. After work is completed, it measures 8. What is the percent improvement?

Accepted Answer

33%

Answer

A reduction from 12 to 8 ACH50 represents a 33% improvement: (12-8)/12 × 100 = 33.3%.

Question 2

What material is NOT recommended for air sealing applications in high-temperature areas near flues or chimneys?

Accepted Answer

Latex acoustical sealant

Answer

Standard latex acoustical sealant is not rated for high-temperature applications and can off-gas or fail near chimneys and flues.

Question 3

In the context of BPI standards, what is the 'house as a system' principle as applied to air sealing?

Accepted Answer

Understanding that sealing one area can affect pressure, combustion safety, and ventilation throughout the whole home

Answer

Air sealing changes building pressure dynamics, potentially affecting combustion appliance safety and indoor air quality, requiring a whole-system approach.

Question 4

What is the purpose of a 'worst-case depressurization test' performed before air sealing work?

Accepted Answer

To determine if combustion appliances are at risk of backdrafting under typical operating conditions

Answer

The worst-case depressurization test simulates the most severe pressure conditions to identify combustion appliance backdraft risk before tightening the home.

Question 5

Which air sealing measure addresses the 'attic bypass' pathway at dropped soffits above kitchen cabinets?

Accepted Answer

Sealing the interior top of the soffit with drywall and caulk or foam before insulating

Answer

Dropped soffits above cabinets often connect to wall cavities that bypass to the attic; sealing the top of the soffit before insulating stops this pathway.

(BPI) Building Performance Institute Certified Practice Test

(BPI) Building Performance Institute Certified Practice Test

BPI Air Sealing 4