april 13, 2010 10:27am

Turn spring into summer

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This is an aspect I had not thought about: A Passivhaus, at least one in the UK, can turn a cold spring day into summer.

The sun has been out for about 4-5 days and the thermal mass is now warming right through. Throughout the day the average indoor temperature is between 21 and 23°C. The humidity is near perfect.

The MVHR is off during the peak sun hours and 2 windows on tilt, plus the glazed door at times, are sufficient for passive ventilation.

It's hard to describe, but it feels like an early summer.

So you can't open windows in a Passivhaus? In practice the windows and doors can be opened even sooner than in a less well insulated house, and you can still maintain > 20°C even when it's quite cool outside.

The winter memories are rapidly being washed away.

Posted By: MarkTiramani

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