425 Grand Concourse: Passive House on a Grand Scale
425 Grand Concourse is a joint effort between SWA, Trinity Financial, MBD, and Dattner Architects. Upon completion, it will be the largest mixed-use Passive House building in the world, and will consist of 260 affordable housing units, a grocery store, a charter school, a clinic, and a community space.
The residential tower will incorporate numerous design features to ensure high levels of energy efficiency and comfortable living conditions for the tenants. An essential component of the building’s Passive House design will be a prefabricated wall system that will be constructed off-site with keen attention placed on air sealing and insulation details. This system will be designed to minimize thermal bridging at critical points in the thermal envelope; thus allowing the building to meet the strict energy demand criteria required for Passive House certification.
The residential and commercial spaces will be ventilated with highly efficient energy recovery ventilation (ERV) systems. These systems are a key element to Passive House buildings as they allow for adequate ventilation while minimizing heat loss as warm conditioned air is exhausted from the building.
425 Grand Concourse is projected to save 90% of energy demand for cooling and heating when compared to other typical existing high-rise apartment buildings of a similar size. It is also projected to save between 60 and 70% of the whole energy demand. As a result, these energy savings will translate into significant cost savings for the tenants. In accordance with the overarching greenhouse gas reduction goals set forth by NYC and the Passive House certifying agencies, 425 Grand Concourse will help set a precedent for the design of large, high-performing buildings.