Crack Infiltration Rates for Passive Ventilation

Extending SketchUp Sefaira
1

Hi there,

Could someone please answer my question on the forum below:

I am wanting to know how the baseline “Crack Infiltration rate" of 2.00 L/s-m is set/based off? We only use Air Changes per hour but due to Sefairas passive ventilation I have to use crack infiltration on the web app. Is there a set of standards you are basing this off or is there a conversion from ACH to crack infiltration I can use?

Many thanks,
Ollie

2

I did a quick search with Google using “Crack infiltration” as the serach string and got this:

You can probably find more if you search the ASRAE web site or use “ashrae infiltration air” as the search string with Google.

Don’t worry, CFM are easy to transform in L/s or cu m/s.

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