This session featurs a presentation and discussion on the the Passive House Institute’s EnerPHit program for certifying existing buildings to the PH Standard. John Mitchell, principal at leading Passive House consulting firm bldgtyp, explains the EnerPHit Standard, reviews its multiple pathways, explains its relationship to Passive House, and describes its unique long-term, step-by-step planned option. Historic masonry and wood frame renovation case studies diving into the methodology will be included.