HERS Diagnostics & Performance Testing

Question 1

What does a blower door test measure?

Accepted Answer

Air leakage in the building envelope

Answer

A blower door test quantifies the air leakage in a home, helping assess its airtightness and energy efficiency.

Question 2

Which device is used during duct leakage testing?

Accepted Answer

Duct blaster

Answer

A duct blaster is specifically designed to pressurize and measure leakage in duct systems.

Question 3

Why is it important to conduct combustion safety testing?

Accepted Answer

To verify safe venting of combustion gases

Answer

Combustion safety testing ensures fuel-burning appliances are venting properly and not posing carbon monoxide risks.

Question 4

What measurement is typically used to express air leakage during a blower door test?

Accepted Answer

CFM50

Answer

CFM50 stands for Cubic Feet per Minute at 50 Pascals of pressure, which is the standard for blower door tests.

Question 5

Which reading on a manometer indicates a significant pressure difference during testing?

Accepted Answer

50.0 Pa

Answer

A large pressure difference indicates leaks or issues in airflow, which may require further inspection or sealing.

(HERS) Home Energy Rater Certification Practice Test