The preliminary Blowerdoor n50 airtightness test of the passive house in Knyazhevo, Sofia was completed with a great result.
The test is mandatory for every passive house construction and is conducted initially as a preliminary – during the finishing works and once again as final – after the full completion of the construction works. The result of 0.34 [h-1] is significantly better than the value required for a passive house, 0.6 [h-1] and proved the good work of the whole team – designer and project management, contractors of rough construction, window installers and building services team. Construction continues, and news is coming soon …
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