Final Airtightness 0.065! Best in the UK!
The final blow door, airtightness test,has just been done, which we believe is the best airtightness for any building in the country with an air change rate N50 of just 0.065 h-1 @50pa. The only lower result we have found is a 0.05 for a large building in Germany, if you know any lower result please let us knows. But don’t worry you won’t die of suffocation, it would take many days of the MVHR unit not working and you not going out or opening a window, even when you feel muggy! We have also installed a CO2 Alarm just in case.