Katrin Klingenberg explains some of the technical details of a passive house. Photo by Heidi Marttila-Losure
![Katrin Klingenberg explains some of the technical details of a passive house. Photo by Heidi Marttila-Losure Katrin Klingenberg explains some of the technical details of a passive house. Photo by Heidi Marttila-Losure](https://dakotafire.net/wp-content/uploads/2014/01/KatrinKlingenberg-660x330.jpg)
Katrin Klingenberg explains some of the technical details of a passive house. Photo by Heidi Marttila-Losure
Katrin Klingenberg explains some of the technical details of a passive house. Photo by Heidi Marttila-Losure