Upgrades in New PHPP 9: PER, Classes, Criteria

From the Passive House Institute (PHI): For almost 20 years, Passive House criteria have constituted guidelines for an excellent level of energy efficiency, cost-effectiveness and comfortable living conditions. To date, more than 1 million square meters of Passive House floor area has been certified through the quality assurance system set up in parallel.  Through the course of time, these criteria have been carefully adapted and augmented several times in line…