Ach50
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Talking to Contractors About Airtightness
How to work with your contractor to ensure you end up with a tight house
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Blower Door Testing on a Small House
Because blower door tests measure surface area rather than volume, ACH50 results can be misleading. The CFM50 metric is more accurate for small homes.
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Using a Blower-Door Test and Interpreting the Results
An introduction to the technology and calculations for measuring a home’s energy performance
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Understanding R- and Other Values
You have to pay attention to the numbers, but first you have to know what the numbers mean
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Is it Time to Move Away From ACH @50 Pascals?
Momentum is building to abandon ach50 in favor of cfm50 per square foot of shell area
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The Energy Conservatory’s New Blower Door Kit
TEC did its homework: its new blower door package is a truly engineered and integrated equipment system
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Air Sealing and Insulation in the ProHOME
Building an airtight house requires the right materials and the right techniques
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Meet the Tightest House in the World
An Alaska couple sets a world mark with a blower-door test result far below the Passivhaus standard
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What’s a Blower Door Good For?
Hint: It’s NOT 'natural' air changes per hour
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Air Leaks Happen at the Surface, Not in the Volume
So why do we still report blower-door results in ‘air changes per hour’?
