AECB Silver Standard Certification
This high quality self-build constructed in 2007-2008 needed no heating, but was not certified to any standard and was putting off potential purchasers.
We used the Passivhaus Planning Package to assess the building, Paul Jennings did the airiest. It fell just shy of Passivhaus, but comfortably complied with AECB Silver Standard, once the original ventilation was upgraded.
The basic Rega MVHR used all flexible ductwork and had no insulation on the exhaust and inlet ducts. The external vents were too high to reach for maintenance and were caked with debris.