It is not that ser­i­ous... be­sides cer­ti­fied Pass­ive House build­ings or En­erPHit ret­ro­fits, PHI Low En­ergy Build­ings are also suit­able for a pro­ject doc­u­ment­a­tion.

Pas­siv­haus In­sti­tut

Build­ing a sus­tain­able fu­ture to­geth­er!

 

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