Hello everyone,
Iâm a bit âsurprisedâ by the result of our blower door test:
We achieved a value of 1.5 1/h (n50) (the maximum allowed is exactly 1.5 1/h).
Yes, the requirements for a KfW55 house are met, but it still makes me somewhat uneasy.
What values have you achieved, and can anyone guess what might be causing this?
Our detached house:
- with a usable basement
- with an air-to-water heat pump + central controlled residential ventilation
- solid construction with filled 36.5 cm (14.4 inches) bricks
Iâm a bit âsurprisedâ by the result of our blower door test:
We achieved a value of 1.5 1/h (n50) (the maximum allowed is exactly 1.5 1/h).
Yes, the requirements for a KfW55 house are met, but it still makes me somewhat uneasy.
What values have you achieved, and can anyone guess what might be causing this?
Our detached house:
- with a usable basement
- with an air-to-water heat pump + central controlled residential ventilation
- solid construction with filled 36.5 cm (14.4 inches) bricks
I think we had 0.6. We also had drafts coming through an opening at the kitchen window sill. The countertop was installed there, but the kitchen hadnât been delivered yet. The guy who did the test checked for these kinds of spots beforehand and sealed them. For example, he put tape over the window sill, sealing a small hole in the mortarâusing the same tape that was also used to seal the attic hatch. After that, no more drafts came through there.
H
Hausbau 558 Mar 2022 09:09Tolentino schrieb:
Why would you need this if it has already been approved?
Maybe only when selling. Then you can do it at that time, or is it expected that more inaccuracies might develop in the meantime?Sometimes itâs easier to sleep at night with a good result. Whether to repeat a successful inspection is a personal decision of the original poster.
We built without meeting a specific KfW standard and had a value of 0.3... but we also did not install a mechanical ventilation system.
At the time of the test, the interior of the building was fully plastered, and the drywall was already completed. The screed had not yet been poured, and the window sills were also not yet installed. The building still had no external insulation, plaster, or paint.
At the time of the test, the interior of the building was fully plastered, and the drywall was already completed. The screed had not yet been poured, and the window sills were also not yet installed. The building still had no external insulation, plaster, or paint.
0.45 in my Passive House ground floor unit with about 65m² (700 ft²)
However, the sealing of the pipes leading to the utility room was only temporarily sealed with snow.
Still, I am surprised by the 0.3 reported by @Basti2709.
The larger the house or apartment, the easier it is to achieve low values since the air change rate is calculated based on the total volume. How large was the house, @Basti2709?
However, the sealing of the pipes leading to the utility room was only temporarily sealed with snow.
Still, I am surprised by the 0.3 reported by @Basti2709.
The larger the house or apartment, the easier it is to achieve low values since the air change rate is calculated based on the total volume. How large was the house, @Basti2709?
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