Blower Door Testing

Get ACH Testing For Code Compliance

New construction homes need to pass a blower door test to confirm a low air leakage rate. Different climate zones allow different air exchanges per hour.

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Who Requires Blower Door Tests?

The International Residential Code (IRC) and International Energy Conservation Code (IECC) require blower door tests.

The goal of a blower door test is verifying that a new home has an acceptable amount of air leakage. Too much air leakage will result in excessive energy waste.

How Does Blower Door Testing Work?

Air changes per hour (ACH) testing for code compliance follows a straight-forward and scientific process.

The Fan Is Installed.

The blower door fan is installed in an exterior door of the house. Other openings in the thermal envelope are set as they will be during occupancy.

The Home Is Pressurized Or Depressurized.

The fan either adds or removes air from the home. As the air pressure changes, air leakage reveals itself.

The Air Changes Are Precisely Measured.

Specialized equipment measures the exact air exchange (ACH) and the amount of air that moves through the fan (CFM).

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Climate Zone Requirements

Acceptable ACH By Climate Zone

Climate Zones 1 - 2

For these climate zones, air leakage rate cannot exceed more than 5 ACH (air changes per hour).

Climate Zones 3 - 8

For these climate zones, air leakage rate cannot exceed more than 3 ACH (air changes per hour).

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Why Work With Us?

Your home needs a blower door test to meet code compliance. But why trust South Central Services for your blower door test?

Most Up-To-Date Testing

Our tests comply with ASTM E-779 (2019), which is the most advanced method of testing air leakage.

Reliable & Educated Technicians

Our team is certified to perform blower door testing. We are also committed to lower energy costs through limited air leakage in homes.

A contractor at South Central Services completing a blower door test in a new construction home.

Blower Door Testing FAQs

When Do I Schedule My Blower Door Test?

What Happens If I Fail My Blower Door Test?

Where Do You Offer Blower Door Testing?

How Much Does A Blower Door Test Cost?

Request A Blower Door Test

South Central Services is certified to offer blower door tests. Our technicians will work with you to measure the airtightness of your home.

We strive to provide flexible scheduling. However, the sooner you can get on our calendar, the better!