Test blower door form 2025

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The document outlines the procedure and results for a Blower Door Test, which measures air leakage in residential buildings. It includes details such as permit information, house specifications, testing methodology, and compliance with the 2015 Washington State Energy Code. The test results are reported in Air Changes per Hour at 50 Pascals (ACH50) and must not exceed 5 ACH50. The document also specifies conditions for testing and certification requirements.

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Whats a good blower door test score?

The pulse test for air tightness is a modern method that accurately measures a buildings air leakage using pressure shockwaves. It provides a quick, simple assessment without a door fan, delivering precise results in real-world conditions.

How do you calculate the blower door test?

The ACH50 Calculation The formula is the rate of airflow in cfm x 60 minutes in an hour / volume of the home = number of air changes per hour. As an example, a home had a blower door test of 750 cfm and a calculated volume of 12,000 cubic feet. Using the formula, 750 cfm x 60 minutes / 12,000 cu. ft.

What is the blower door test measurement?

Blower door values Air flow at 50 pascals is the preferred value for blower door testing The amount of airflow measured in cubic feet per minute (cfm) for a pressure difference across the enclosure of 50 Pa is expressed as CFM/50.

How do you pass the blower door test?

Passing a blower door test often requires a combination of proper construction techniques and high-quality materials. This includes using proper air sealing techniques during construction, choosing energy-efficient windows and doors, and ensuring all s through the building envelope are properly sealed.

What is the formula for air leak test?

The formula used to determine the extent of compressed air leaks at a facility is: Leakage (%) = (T x 100) (T + t) T = onload time (minutes), t = offload time (minutes).