Modernization to passive house standard

Planning: Ingrid Domenig-Meisinger

In the course of general renovaton, this apartment complex in Linz (constructed 1957-58) was transformed to meet passive house standards. Thereby heating costs for a 60 m² apartment were reduced from € 40,80 to less than € 5 per month.

A prefabricated, ventilated GAP solar facade was mounted on the outside wall to enable absorption of solar irradiation by the facade and create a warm zone on the outside wall to reduce heat loss. The windows were equipped with triple-glass insulating panes with integrated integrietem shading, and existing balconies were extended to loggia and correspondingly insulated. Roof and cellar insulation was improved and the roofing was replaced. A ventilation system contributes to making the building meet passive house standards.

Each apartment was equipped with individual comfort ventilation system with a heat recovery of up to 70%. Water heating was upgraded from antiquated gas demand water heaters to district heating demand water heaters.