Many classroom environments are unhealthy and uncomfortable, creating poor learning environments with high absenteeism. Older, unventilated classrooms can be economically decarbonized with improved air quality and comfort. This session will present the conversion of a junior high school classroom, featuring a "rolling" room-by-room installation process using a community's local HVAC installation labor with one day of classroom downtime.

Curtis + Ginsberg Architects has completed 6 multifamily Passive House buildings, with two more in construction and six more in design. Steven Winter Associates has completed over 20 Passive House buildings, with 15 more in construction and 30+ more in design. We have collaborated on many of these projects. By reviewing variations in the systems, we can draw conclusions about what works best for structure, envelope, ventilation strategy, heating and cooling systems, and on-site generation.

We will present tales from the trenches for ventilation approaches within the context of the Passive House building certification standard. This standard has set a high benchmark for low-energy buildings and is widely known as the most rigorous energy efficiency standard currently available. Attendees will learn how balanced ventilation is best applied in a cold climate at a large scale and how commissioning plays a key role in this process.