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3L/min per 100 square feet 9. 29 m2 of Conditioned area when tested at a pressure differential of 0. 1 inches w. g. 25Pa across the entire system including the manufacturer s air handler enclosure. All register boots shall be taped or otherwise sealed during the test. Rough-in test Total leakage shall be less or equal to 4cfm 113. 3L/min per 100 square feet 9. 29 m2 of conditioned area when tested at a pressure differential of 0. If the air handler is not installed at the time of the test total ...

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We have answers to the most popular questions from our customers. If you can't find an answer to your question, please contact us.

What are the results of a door blower test?

CFM below 1250 indicates reasonably airtight home. CFM between 1300 to 3000 indicates a moderately leaky home. CFM over 3000 indicates a leaky home that would definitely benefit from sealing the leaks.

What is the standard for blower door test?

This test ensures a certain level of energy performance and is often used when a project team is aiming for a performance-based building standard like Passive House, which requires a blower door test result of less than 0.6 air changes per hour at 50 pascals of pressure (ACH 50).

How to calculate blower door test results?

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.

How hard is it to pass a blower door test?

It is estimated that 50% of newly constructed homes will fail the blower door or air-tightness test. Most blower door test failures occur because of a lack of understanding of what is necessary to create a continuous air barrier system.

What is a good blower door test score?

Generally, the blower door test result depends upon the age of the home, windows, doors, and insulation levels. A new house or building should have a score of less than 3.5 ACH50. The result between 3m3/hr/m2 and 5m3/hr/m2 is a good score.

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What is a good ACH rating?

The very best homes have an ACH score below 1 ACH, and ultra-efficient homes are in the range of 0.2-0.6 ACH. If you are looking into buying a home, and want one that is air-tight, then ask your builder about the ACH score and what their homes typically score.

What is a good CFM for a blower door test?

Air flow in a well-sealed building will generally be less than 1,500 CFM at 50 pascals. Air flow above 4,000 CFM would be considered leaky. This is valuable data that can be acquired in about half an hour with the use of a blower door.

What is a good ACH for blower door test?

The average blower door test result depends largely upon the age of the home, the insulation levels, and the age of the windows and doors. Generally, a new home should test less than 3.5 ACH50, as the insulation levels and efficiency of the windows/doors would make for a fairly airtight home.

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