We have much to learn from the successes and challenges faced by the first generation of large Passive House projects. This session will examine new construction and retrofits of mid-size and larger projects including office space, high-rise residential, mixed-use buildings, and factories. We will cover climate-related challenges, limitations of modeling tools, QA-QC plans for successful implementation and code challenges. This session is intended for those with Passive House experience; basics will not be covered.