Passive Houses are built 8 to 10 times more airtight than a typical code-level building. As a result, less
moisture transfer occurs through the exterior wall assembly via air leakage through the façade. This can lead to high interior relative humidity levels and pose increased risk of condensation on the building structure. The primary means of controlling humidity levels in a Passive House is through the ventilation and heating & cooling systems. This talk will outline an example of how this risk was assessed for a current PH project and will detail what design options are available to reduce this risk. The presentation will be multifamily focused.

Learning Objectives:
1. Attendees will learn how humidity concern and risk of condensation is amplified in a Passive House.
2. Attendees will get an in depth look at a method of modeling humidity levels in a Passive House.
3. Attendees will better understand why the risk of high humidity levels is important to the PH
enclosure.
4. Attendees