What is the maximum ach(infiltration) for residential buildings?

asked 2019-08-08 02:30:35 -0500

Prasanth M's avatar

updated 2019-08-08 09:08:40 -0500

I would like to know the maximum infiltration rate in general for any residential building. Thanks in advance.

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Can you give more context to your question? There's obviously no physical maximum value...

shorowit's avatar shorowit  ( 2019-08-12 19:03:53 -0500 )edit

Thank you Sir, Actually I built 2 storey residential building, I calculate infiltration rate from Ashrae 1997 fundamentals chapter 25, table 3 and I got 0.135 ACH. I took stack coefficient = 0.00029,wind coefficient=0.000231, average wind velocity is 5.36 m/s, temperature difference is 20.4 degree Celsius. I want to know the minimum valve of infiltration rate?

Prasanth M's avatar Prasanth M  ( 2019-08-13 00:34:14 -0500 )edit

Since infiltration is a function of indoor-outdoor temperature difference and wind speed, the theoretical minimum is 0 if dT=0 and ws=0. That's also assuming no pressurization due to ventilation devices.

lisang's avatar lisang  ( 2020-03-10 08:41:21 -0500 )edit