According to Passive House principles, the EU-project outPHit promotes deep retrofits which are cost-efficient and reliable. Based on model projects and with the cooperation of many partners, outPHit opens up ways to implement deep energy retrofits. In the process, solutions with a one-stop-shop approach reduce the effort for planning, execution and
quality assurance.

Do you know what are the benefits of building certification? The Passive House Institute provides these type of energy certification, which can be of several levels based on the use of renewable energy.