Hello,
Today, as the final trade in our already occupied house, we had the airtightness test.
The result: N 50 = 0.68
We built a solid KfW 70 (2017) standard house. What does this mean? Is this good, acceptable, or rather mediocre?
Should we expect particularly harmful leaks? The tester detected a slight leakage at a sliding door but considered it within acceptable limits, which brings us back to the original question.
Today, as the final trade in our already occupied house, we had the airtightness test.
The result: N 50 = 0.68
We built a solid KfW 70 (2017) standard house. What does this mean? Is this good, acceptable, or rather mediocre?
Should we expect particularly harmful leaks? The tester detected a slight leakage at a sliding door but considered it within acceptable limits, which brings us back to the original question.
N
nominator7 Feb 2020 16:54Something is off – you definitely need to get below 1.0, ideally under 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 have been around 0.6 or better.
N
nominator7 Feb 2020 21:10We have a controlled residential ventilation system, and before the blower door test, everything was sealed off and then measured. If there are no holes at all yet, the result should be at least as good as after the holes are made.
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nominator7 Feb 2020 22:44The "everything" referred to the openings of the mechanical ventilation system with heat recovery, which your house from the Middle Ages did not have yet.
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