Any experience with earth tubes.

[NeilBlanchard]

I only know some general information from so-called envelope houses in the 80's. Do you have an exhaust up high in the house for passive air flow in the summer?

[Ormston]

Originally Posted by NeilBlanchard

I only know some general information from so-called envelope houses in the 80's. Do you have an exhaust up high in the house for passive air flow in the summer?

We are not going for passive airflow, don't think it would be very easy to achieve with the design of the house and duct rout's we have done.
We have 3 rooflights on the 2nd floor which can be kept open through summer.

The exhaust will be 2 to 3 meters above ground level but 5 below the ridge of the roof.

Steve