Social equity is key to the work that we do in the built environment. Far too often, marginalized communities receive more of the burdens and less of the benefits of 21^st century living – especially when it comes to housing. As an industry, it is our responsibility to address these disparities and come up with solutions that are inclusive of all people. But first, we wanted to grow our own understanding of the issues and hear what others are doing to prioritize social equity in the built environment.

Our guest for this month’s episode of Buildings + Beyond is Jeremy Hays. Jeremy has a wealth of knowledge, experience, and perspective that stems from a combination of social and environmental justice. We learn about how cities are incorporating equity into their sustainability plans, why diversity of perspectives can create better solutions, and how actively thinking about equity can help the transition to a green economy.

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The Intergovernmental Panel on Climate Change (IPCC), viewed as the most credible source of climate change research, issued an alarming report on October 2018 removing all doubt – absent aggressive action the atmosphere will warm up by as much as 2.7 ° F above preindustrial levels by 2040, inundating coastlines and intensifying droughts and poverty. The significance of this report is that the effects of climate change will occur in our lifetime.

The building construction sector has a critical role in drawing down carbon emissions by 2040. As nations all over the globe tackle operational emissions from buildings, we must now address our total emissions impact.

 

Life-cycle emissions resulting from buildings consist of two components: operational and embodied. A great deal of effort has been put into reducing the former as it is assumed to be higher than the latter. Studies have revealed the growing significance of embodied emissions in buildings, but its importance is often underestimated in energy efficiency decisions.

According to the Embodied Carbon Review 2018 by Bionova Inc, embodied carbon is the total impact of all the greenhouse gases emitted by the construction and materials of our built environment. Furthermore, during their life-cycle, the same products also cause carbon impacts when maintained, repaired, or disposed of.

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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.

A 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. (more…)

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.