NEW RECORD ? – 0.19 AIR-EXCHANGES/HOUR @ 50 Pa

Peter Flaherty and Thomas Monaghan of Advanced Airtighness Solutions after a successful airtightnesstest.

Peter Flaherty and Thomas Monaghan of Advanced Airtighness Solutions after a successful airtightness test on February 10th 2016.

Passive House verification sheet.

Passive House verification sheet.

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.

Walls flipped over at production table in factory

Walls of two-storey house flipped over at production table in factory

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.

House in factory last week of November 2015

House in factory last week of November 2015

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%

House after the first week in December 2015

House after the first week in December 2015