A record air-tightness of 0.19 air-exchanges per hour at 50 Pa pressure was measured at the preliminary pressure test today. The house is a Skagerack 188 built in Galway city.
This house was produced in our factory in late November and erection on site started on December 1st.
Scandinavian Homes standardized production methods ensure a uniform quality. This is extra valuable when building two-storey houses where it can be tricky to get the construction air tight between the floors.
The German Passive House Institute require an air-tightness <0.6 exchanges/h, so 0.19 exchanges/h is considered very good. That said, we still focus more on the outer air-tightness. For real world heat-losses in windy climates, we consider this outer air-tightness more important than the inner air-tightness that can be measured with this blower door test.
Another funny fact is that since PHI in Darmstadt does not recognize Swedish test results of the REC Temovex Blue 4 HRV unit (92% efficiency in Sweden),we are handicapped by being forced to use poorer default value of 80%