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Blower Door Duct Blaster Form 2025

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The document outlines the procedures and requirements for conducting blower door and duct blaster tests as part of air infiltration and duct sealing assessments in Texas housing units. It includes data collection fields for initial and final readings, guidelines for achieving air infiltration and duct sealing targets, and compliance measures for subrecipients involved in weatherization programs. The goal is to ensure that completed units meet specified performance standards to improve energy efficiency.

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2023	4.2 Satisfied (55 Votes)
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How do you pass a blower door test?

The best approach to passing a blower-door test is to understand where houses leak air and design an air-sealing strategy with that in mind. Performing a mid-build blower-door test is also good practice.

How many CFM do I need for a blower door test?

On the other hand, if you use CFM to calculate your blower door test, the rule of thumb is to achieve a CFM below your square footage. So a 2000 sq. ft. home should generally aim for below 2000 CFM on their blower door test.

What is the formula for duct blaster?

This test condition is known as Untaped and is the basis for the Air Changes per Hour calculation, ACH50 = CFM50 x 60 / house volume. duct leakage. Newly constructed homes in the 1,500 - 2,500 ft2 range should test at less than 8 ACH at 50 Pascals pressure (8 ACH50).

What is a good CFM50 number?

If your home is 2000 square feet, a blower door number of 2000 cfm50 is decent (but not especially good). b. If your home was 5000 square feet, we would like to see your number a good bit below 5000, perhaps 3500 or so. Larger homes are often a bit easier to tighten.

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).

What is the purpose of a duct blaster?

A Duct Blaster is used to directly pressure test the duct system for air leaks, much the same way a plumber pressure tests water pipes for leaks. The Duct Blaster fan is first connected to the duct system at the air handler cabinet, or a return grille.

What is a good blower door test score?

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.

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.

Blower Door Duct Blaster Form 2025

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