A
AndreasPlü5 Jan 2018 23:51Hello,
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.
Depending on the source, different limit values can be found.
The Energy Saving Ordinance specifies 3.0, and with a ventilation system 1.5. The KfW program 153 at funding level 40 Plus also states 1.5 with a (mandatory) ventilation system, but recommends <0.6.
A passive house should also be below <0.6 according to PHPP.
I am not familiar with regularly typical measured values for comparable new buildings. In that case, I would trust the person who took the measurement that your value is acceptable.
Is the lift-and-slide door leaking at the connection? That could still be reported to the supplier. Otherwise, lift-and-slide doors are simply not perfect by design when it comes to airtightness (and water tightness as well).
The Energy Saving Ordinance specifies 3.0, and with a ventilation system 1.5. The KfW program 153 at funding level 40 Plus also states 1.5 with a (mandatory) ventilation system, but recommends <0.6.
A passive house should also be below <0.6 according to PHPP.
I am not familiar with regularly typical measured values for comparable new buildings. In that case, I would trust the person who took the measurement that your value is acceptable.
Is the lift-and-slide door leaking at the connection? That could still be reported to the supplier. Otherwise, lift-and-slide doors are simply not perfect by design when it comes to airtightness (and water tightness as well).
K
Knallkörper6 Jan 2018 10:35Our first measurement showed 2.5. There were two unsealed openings: a 180mm (7 inch) chimney flue and a 180mm (7 inch) exhaust vent in the kitchen. So 3.0 would really be shoddy work if that is the final condition according to the energy saving regulations.
I would assess leaks depending on their location. A leaky door to a cold attic is "fatal." Poor vapor barriers that can cause condensation within the insulation layer should be removed. A leaky patio door, on the other hand, would hardly bother me.
I would assess leaks depending on their location. A leaky door to a cold attic is "fatal." Poor vapor barriers that can cause condensation within the insulation layer should be removed. A leaky patio door, on the other hand, would hardly bother me.
Knallkörper schrieb:
A value of 3.0 would really be poor workmanship if that’s the final result according to the energy saving regulations.Yes, I agree. But that’s actually the case, you can verify it yourself.
Overall, the energy saving regulation and the EE Heating Act are not nearly as bad as their reputation suggests. There are numerous exceptions, alternative measures, basically "many ways to Rome." You can also apply for exemptions if cost-effectiveness is not given, and so on.
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