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How to Implement an Efficient Lighting Strategy in a Multifamily Passive House

Walking the aisle of your favorite home improvement store, you’ll notice the wide array of options for very efficient light fixtures. Don’t be fooled – truly efficient lighting design is achieved through thoughtful layout and proper controls.

Hallway lightingA high performance building warrants an efficient lighting strategy. With so many efficient LED fixtures available on the market, individual fixture efficiency is rarely an issue. However, these fixtures are often placed in high concentrations or at a higher wattage than necessary to adequately illuminate a space. The result is high lighting power density (LPD), which is measured by dividing the total light fixture wattage in a room by the square footage of that room. Even with controls such as occupancy or vacancy sensors, high LPDs are especially energy intensive in frequently occupied common areas, e.g., corridors and lobbies of multifamily buildings, impacting the bottom line efficiency of all buildings.

Projects pursuing Passive House certification are impacted by an optimized lighting scheme more so than a code-built building. As the heating and cooling energy used in a Passive House building decreases due to an excellent thermal envelope, the ratio of lighting energy used increases. Reducing lighting energy use can drastically improve the building’s overall primary energy demand. Read more

Stamford 2030 District Commits to a Sustainable Future

The Stamford 2030 District is an interdisciplinary collaborative of high-performance buildings in downtown Stamford committed to ambitious efficiency goals. Stamford 2030 District’s strategic plan outlines a series of interim sustainability goals guiding the city towards 50% reduction in energy use, water consumption, and CO2 emissions for existing buildings and infrastructure, and full carbon neutrality for all new construction by 2030. Watch the video to hear key program stakeholders discuss success measures, including SWA’s Gayathri Vijayakumar on the role of benchmarking, and Mayor David Martin on public-private-nonprofit community participation.