How Many Fans To Use For A Blower Door Test | Tools

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I have a Energy or Enclosure Integrity Test to perform.  How many fans do I need to properly run the test?  Do I have enough fans to run the test?​


We have created two tools to help you ​figure out how many fans you will need for your test. 

To access them, click on the link below:

Then, scoll down to the Tester Tools section and download either the Blower Door or Enclosure Integrity version of the Number of Fans Calculator

Next, open the file in excel and "Enable Editing" when a security warning appears.

Fill in all the fields highlighted in blue.  The number of fan results are highlighted in green.

Here is what the Blower Door Number of Fans Calculator looks like:

And this is what the Enclosure Integrity version of the Number of Fans calculator looks like: 

Note that these tools are only approximations and only serve as a guide.