Blower Door Test - Meaning of the Result

Something is not right - you definitely have to get below 1.0, better below 0.5, then everything is fine. We had 0.65 and a double cat flap in the wall when it was tested - without that, it would certainly have been in the range of 0.6 or better.

1.36?
And even though the wall penetrations etc. have not even been made or are in operation yet?

No idea what that means.
But doesn't one usually only do the blower test when everything is "active"?
Otherwise the data would be distorted.

We have a controlled residential ventilation system and before the [BDT] everything was taped off and then measured. If there are no holes at all yet, the result should be at least as good as after the holes.

If I can tape everything off for the test, damn, I’ll have a top result even in my 60s-era building.

The "everything" referred to the openings of the controlled residential ventilation that your medieval house did not yet have.

If you only knew