Heat pump water heaters inside apartments, with field installations good and bad and data on how they interact with space conditioning, and a new system for multifamily Passive House combining heating, ventilation, cooling, and hot water.
Passive House for diverse residents: Mirador de Gràcia, certified senior care housing in Catalonia's warm climate, where overheating is a risk, and Charlotte of the Upper West Side, Manhattan's first PHI-certified condominium in a landmark district.
Components and materials for operational and embodied carbon: biogenic, foam-free Passive House prefab built with design for manufacture and assembly (DfMA), and a comparison of embodied and operational carbon in large Passive House buildings.
Turning PHPP into a commissioning digital twin: a shadow PHPP fed with actual weather, metered data, and utility bills to find installation and commissioning problems early, close the performance gap, and inform future models.
Certified ventilation options from Systemair and Zehnder, from single-family homes to complex commercial buildings, and the root causes of indoor humidity problems and how ventilation can help solve them.
The Jennings Hall expansion in Brooklyn, 217 all-electric affordable senior homes in a 14-story Passive House enclosure pushing toward net zero: its architecture, and its water-source heat pumps on a geo-exchange system.
Two single-family projects shaped by place: retrofitting an old home on a Greek island with no local Passive House expertise or materials, with the resulting data, and a high-end Connecticut home that makes Passive House performance the expectation.
Affordable housing and Passive House delivery: 97-10 Sutphin Boulevard, 173 permanently affordable homes in Queens with a health center, and practical strategies to keep Passive House as the goal from kickoff through closeout.
Getting Passive House performance recognized: a modeling crosswalk comparing PHPP, WUFI Passive, and CBECC results under California's Title 24, and Phase II of PHN's energy study by RDH, comparing common building standards with Passive House for multifamily buildings.
Passive House for children: the Witset First Nation's Youth Healing Lodge in British Columbia, for the children and families of residential school survivors, and the Upper School at The Bush School in Seattle.
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