reference volume for blower door test

[Nick Grant]

I am still confused about this.

For PH certification how is the internal volume calculated? subtract first floor volume? Internal walls etc as well?

Came up discussing Bills result for DD.

Cheers

Nick

[Alan Clarke]

Nick
you mean the volume associated with the ach@50Pa figure? It is the volume the tester used to derive the quoted ach from the m3/hr actually measured during the test – so that the identical m3/hr figure can be used in PHPP.

The volume to use is defined in the airtest standard, not by PHPP, and as far as I know it is simply the gross volume enclosed by the air barrier.

Alan

[Nick Grant]

I'll email you Alan.

[Mark Siddall]

For pressure test volume WF has confirmed that it is the volume is the total internal volume less floors, staircase and partitions (relates to EN std). Often this can be: (TFA*floor to cieling height)+void from the staircase.

Mark

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