We conducted the first airtightness test last Monday, and the results were a little disappointing. At least I know where to apply effort to improve things. This is one criteria that will probably ensure that we can't get Passivhaus EnerPHit certification. Have to see what the remedial work gives us. For you cognocenti (and the others), the original house was a typical 1950's job, with and airtightness around 16 ach (air changes per hour) or more. Current regulations for newbuild is 10m3/m2, close to 10ach. We achieved 4.5 ach, but the target is 1 ach. So lots to do. The internal cavity wall is one culprit that will be hard to correct.
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| Door fan in place, with monitoring equipment connected |
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| MVHR pipes into leaky duct - needs proper sealing at the first floor ceiling. |
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| MVHR filters bagged and taped to avoid air leaking out or in |
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