Passive House standard central to New York City Mayor’s plan
Mayor Bill de Blasio’s new plan to dramatically reduce greenhouse gas emissions from city buildings by 2050 relies on Passive House as a guiding standard for new construction and existing building renovation.The Mayor’s plan, One City: Built to Last, released September 20, states that energy used in New York City’s buildings “…accounts for nearly three-quarters of our contribution to climate change.” The solution: nearly two-thirds of greenhouse gas reductions must come from more efficient buildings. The plan’s immediate goal is to achieve 35 percent carbon emissions reductions citywide by 2025, establishing a pathway for New York City to reach 80 percent reductions by 2050.
Describing the sweeping transformation required to meet its aggressive targets, the plan notes, “Overall, the City must cut energy use across all building sectors on average by at least 60 percent from 2005 levels and switch to renewable fuel sources…”. To do this, the report states that New York City will look to “Passive House, carbon neutral, or `zero net energy’ strategies to inform the standards.” The benefits of the plan will extend far beyond carbon reduction. This is “…an affordability plan, an economic development plan, and a public health plan,” the Mayor argues will make for a healthier, more economically vibrant, sustainable and resilient city for all residents.
Designing to the Passive House standard reduces a building’s energy demand for heating and cooling by 90 percent. Reductions are obtained through high levels of insulation, airtightness, and heat recovery, while designing for proper solar shading, solar heat gain, and internal heat gains. Developed in the 1990s by the Passive House Institute (PHI), located in Darmstadt, Germany, a Passive House may be any building type such as home, school, office, store, or factory.
“The Mayor’s plan is a watershed moment,” says Ken Levenson, President of New York Passive House, a local nonprofit organization affiliated with the Passive House Institute. “Not only does it solidify New York City’s leadership in sustainability, but it makes clear that we can successfully address the climate crisis with advanced standards, like Passive House, which are achievable today.”