Kaltern (BZ)

The Rise of the Passive House

CLIENT Family P.
SERVICES Energy Concept, PHPP Calculation, Execution and Detailed Planning, Quality Assurance, Construction Supervision: Eng. Oscar Stuffer – Solarraum
LOCATION I – 39052 Caldaro (BZ)
USABLE AREA / VOLUME 200m², 800m³
ENERGY CLASS KlimaHaus “Gold” (10 kWh/m²a) / Passive House (14 kWh/m²a)
PARTNERS Submission Project, Structural Engineering, Safety: Engineering Office Obrist & Partner

The new section of a semi-detached house was built to passive house standards, despite challenging conditions: closed to the south (extension), very small volume, and limited budget. For this project, the initial submission was optimized using energy calculations (Passive House Planning Software). This led to a redefinition of the building envelope and the development of the execution project with detailed planning.

The building was monitored as part of the “Enerbuild WP5_action 5.4” project. The measured heating energy consumption was 10 kWh/(m²a), lower than the calculated heating demand of 14 kWh/(m²a) using PHPP. The results are telling. In only 2 of the 18 monitored buildings was the measured heating demand lower than the calculated. In the long-term monitoring, the P. house in Kaltern performed the best.