More Than Zero

civil + structural ENGINEER magazine

SEPTEMBER 1, 2017

Buildings consume almost half of the energy provided in the United States and are responsible for nearly half of the carbon emissions. Sustainable building trends have progressed rapidly since the adoption of LEED in 1993, which set the bar for high-performance buildings. During the last 25 years, more stringent criteria have been adopted with increasing environmental concerns in order to drive the industry. Net-zero buildings are part of the latest movement of building with the future in mind.

The term “net zero” can be used to describe a variety of elements in a building. One of the most common definitions, adopted recently by the U.S. Department of Energy, describes buildings designed to be energy-efficient and produce as much energy as is delivered to the project. Other interpretations make distinctions between site and source energy. Site energy refers to energy used in the building whereas source adds in the cost to deliver energy to the building. Additional standards have also been proposed that would require buildings to be net neutral to the environment as a whole. These often include carbon production and offsets, as well as ensuring water and waste are self-sufficient systems.

To ensure a building achieves net-zero energy status, a holistic design process must be employed. Early in the design phase, a commitment must be made to optimize energy performance. However, this should not focus entirely on the energy-generation part of the equation.

The purpose is to balance production with efficiencies. While there are buildings claiming to be net zero by supplying enough onsite renewable energy to offset their typical loads, a true net-zero building focuses first on tightening the envelope and maximizing efficiency. In fact, several certification bodies require a minimum Energy Use Intensity (EUI) measured by kbtu/square foot/year for the building to be considered for net-zero status.

Over and above the certification aspect of net zero, there are real economic incentives in achieving this goal. Assuming your local electricity grid allows the facility to sell energy back to the grid, the cost of the project can often be offset through energy sales over time. In the long-term, the building can actually generate income for the owner or tenants on the energy side.

Several tools exist to determine the target EUI of the building. One of the most simplistic is the Energy Star Target Finder, a free online tool from the EPA that allows designers to enter basic assumptions about the building and location before a project begins. Target Finder also allows users to set a goal for reduction in energy compared to the median building or a specific Energy Star score.

More sophisticated modeling techniques can be used throughout the design process to ensure the building maintains the targeted EUI while exploring different measures as the project moves through critical design stages. Energy modeling software can be used to provide an estimate of real world conditions of the building once fully operational. This number will also help to inform the size of the renewable energy system for the project, whether it be photovoltaics, wind turbines, biomass, geothermal, or hydroelectric.

Once a building is constructed, a simplified measurement and verification process can be employed to determine whether net zero has been achieved. At least 12 months of utility bills through the performance period should be collected to review actual energy use compared to the total renewable generation, on an annual basis. In some cases, a third-party auditor is required to certify performance.

Two key organizations in the net-zero movement — the International Living Future Institute (ILFI) and the New Buildings Institute (NBI) — recently joined forces to concentrate their efforts. ILFI, a non-profit organization focused on creating healthy and sustainable design, has created several certification programs and labels for buildings, including the Zero Energy Building (ZEB) certification. NBI, which provides guidance and tools for net-zero buildings, will now act as the lead certification auditor and administrator of the data. Taking it a step further, ILFI also runs a program called the Living Building Challenge, which promotes net-positive buildings that produce 105 percent of the energy use of the building using renewables.

In many parts of the country there are real opportunities for net-zero construction. Areas with abundant sunlight, for instance, should already be prioritizing this kind of construction. As battery technology improves, increasing areas of the country will find this an economically viable alternative to traditional forms of construction, and a pathway to resiliency. Downward pressure on pricing and increasingly accessible technologies will also drive construction in this area.

High Performance Cities: The 2030 Model

Building Energy Magazine

January 2017

Imagine a City where all of the buildings are carbon neutral. Where buildings can meet their own energy need, while dramatically reducing water consumption and emissions from transportation, keeping properties and businesses competitive, and reducing costs. Now imagine that 15 cities (and growing) across North America are making these drastic changes.  This is the goal for the 2030 Districts Network by the year 2030.

The 2030 District movement

The 2030 District movement is young and rapidly growing, but deeply rooted in the foundations of research on the sustainable built environment. The criteria were created in 2002 by Architecture 2030 visionary, Ed Mazria, who saw early on the need for the built environment, as a major user and producer of energy and emissions, to become part of the climate change solution. He developed goals for reduction in transportation emissions, energy consumption, and water usage that were intended to be used by the global architecture and planning community and applied to both New Construction and Existing Buildings. The 2030 Challenge was subsequently adopted by the U.S. Conference of Mayors and American Institute of Architects (AIA) in 2006.

The first District started in Seattle in 2011 using the targets developed by Architecture 2030 known as the 2030 Challenge for Planning[1]. In 2009 the City of Seattle was faced with declines in the commercial real estate market and increasing energy costs. At the same time, there was an impending building benchmarking disclosure law, and a group formed to establish common goals for building owners to work toward. They realized that together they would could go much further toward their goals than on their own. As a result, almost two years later, the first private sector-led high-performance building District, The Seattle 2030 District, was created[2]. The 2030 District set the goals and provided assistance with benchmarking, which it did anonymously for all of the building owners within their downtown boundary. The tiered goals for existing buildings ultimately target a 50% reduction in energy, water use, and transportation emissions while new construction aims to be carbon neutral. The Seattle model set the stage for the beginning of the 2030 Districts movement. 

District Growth

Over the last 5 years, the 2030 District network has grown to 15 cities, both large and small, across North America. There are also several cities who are considering starting 2030 Districts and are listed in ‘emerging’ status, including: Ann Arbor, MI; Burlington, VT;  Detroit, MI; Tucson, AZ, and New York City. These cities have all committed at least 5 buildings to the challenge and are working to advance the District model. Other cities around the world have expressed interest in creating 2030 Districts, including in several Canadian provinces, Mexico, Europe, and China. To date, almost 1200 properties representing 294 million square feet of commercial building space have been committed to 2030 Districts throughout North America.

District Operations

Each of the 2030 Districts operates as a public-private partnership, bringing together local building industry leaders, community groups, and government. Because the 2030 organization model is driven by the private sector rather than government, it is not subject to changing administrations and priorities, which allows for stability and longevity.

Using collective impact, Districts gather with their members to create partnerships and share best practices and resources to drive their buildings towards the goals. Beyond building owners and property managers, District membership generally includes professional partners, such as energy advisors and utilities, as well as community members, including local non-profits with shared interests. Together these members are able to share resources to meet collective goals. As an example, professional members provide a benefit or service, such as an energy audit, which can be utilized by any building owner member to assess their property to determine potential areas for improvement.

Education is another key component of the 2030 District model. Many Districts provide best practice sharing opportunities on a regular basis to their members so that they can stay up-to-date with the latest tools, technologies, and financing practices in the industry. Beyond sharing information, the meetings serve as a locus where property owners can learn from each other about solutions being deployed in their buildings in a private setting.

The climate mitigation-adaptation nexus

As the Districts progress and evolve, several cities have adopted goals and metrics beyond the Architecture 2030 Challenge for Planning. The 2030 model provides a framework that is flexible enough to provide Districts with the ability to pilot initiatives that can define and address needs specific to their local geographies. The Stamford (Connecticut) 2030 District’s approach to resiliency was highlighted at NESEA’s Building Energy Boston conference in 2016. Two other 2030 cities have explicitly created an additional goal beyond the core 2030 metrics: Seattle and Pittsburgh to address stormwater and health challenges accordingly.

The Stamford 2030 District represents the first time that a local initiative has used a resiliency framework to pursue emissions reductions and climate adaptation goals in an integrated fashion. In recent years, the small, coastal city of Stamford, Connecticut was impacted by Superstorm Sandy and Hurricane Irene, necessitating the development of goals that incorporate both emissions reduction and climate adaptation. With the creation of the 2030 District in 2014, Stamford is working to connect energy efficiency, sustainability, and resiliency.

Stamford is also the second largest energy market in New England, (Boston is first) and the fastest growing. The city is also home to Fortune 500 companies as well as a broad network of small and medium-size businesses. Based on early research by the founding partners of the District, companies are facing increased calls to address resiliency; however, few have methods or systems for doing so. As a result, the resiliency goals of the Stamford 2030 District are shaped by the business community’s focus in that area, including reduced vulnerability to energy disruption by extreme weather events, supply constraints and price volatility.

To begin assessing the vulnerabilities faced by the City, in 2015 the Stamford 2030 District worked with leaders from IBM and AECOM to conduct a one-day workshop with city staff, major business representatives, and the utilities using the UN Disaster Resilience Scorecard for Cities[3]. The findings identified by the team prioritized the needs for the City, including: creating financing and incentives, enhancing and protecting ecosystem services, and creating long-term resilience plans that include engagement.

In order to move these resiliency priorities forward, the District will be working alongside researchers at the University of Connecticut and Columbia University in a research project funded by the National Oceanic and Atmospheric Administration (NOAA). The study will help to identify precipitation thresholds from municipal and climate station data to determine how flooding may change with future events and sea-level rise. This data will be used to inform the City’s long-term planning and the results will be shared with other coastal towns in Connecticut in order to help the region better prepare for climate change. The Stamford 2030 District will continue to work with the city and building owners to develop technical solutions to meet the resiliency goals.

Additional Indicators

The Seattle 2030 District added stormwater as a key goal in order to address issues related to the high amount of precipitation that occurs in the region. Given the density of the city, the ground is unable to absorb and filter excess rainwater which can cause combined sewer overflows that result in sanitary waste deposited into waterbodies, a growing issue in many cities. In order to address this issue, the Seattle District expanded their 50% water reduction goal to include stormwater runoff and created a tool that allows their members to measure the amount of stormwater they are managing on-site. The tool also helps owners to understand how they can achieve their goals using approaches such as bio-retention, permeable pavement, green roofs, rainwater harvesting, and detention vaults.

While outdoor air quality is partially addressed by the 2030 District’s transportation goals (CO2 reduction), indoor air quality is specifically addressed by the 2030 District in Pittsburgh, a post-industrial city. The value of indoor air quality in buildings was recently confirmed in a 2015 Harvard University study which determined that occupants in well-ventilated offices that had below-average levels of indoor air pollutants and carbon dioxide had significantly higher cognitive functioning scores[4]. Indoor air quality is also tied to building energy performance through an increased demand on HVAC systems. In order to identify indoor air quality indicators, the Pittsburgh 2030 District has partnered with The University of Pittsburgh’s Mascaro Center for Sustainable Innovation. The District ultimately hopes to develop a scalable Indoor Air Quality protocol against which progress can be measured.

Future of 2030 Districts

With the growth in the number of Districts, Architecture 2030 has established a 2030 Districts Network, which is a formal structure which guides new and emerging Districts. The vision for the 2030 Districts Network is to create a global brand integral in creating solutions to help the built environment mitigate and resolve global climate change. It will do this by focusing on its key goals of energy, water, and transportation emissions reductions, while also allowing cities to focus on their local sustainability needs. The network plans continued growth and will remain a leader in helping the built environment battle climate change.

[1] Architecture 2030. "The 2030 Challenge for Planning." Architecture 2030, 2015. Web. 21 Nov. 2016. <http://architecture2030.org/2030_challenges/2030_challenge_planning/>.

[2] Kalousdian, Aram. "Seattle Creates High-Performance Building District." Blog post. Sustainable City Network. N.p., 15 June 2011. Web. 21 Nov. 2016. <http://www.sustainablecitynetwork.com/topic_channels/building_housing/article_4b77db52-939e-11e0-aa0a-0019bb30f31a.html>.

[3] IBM and AECOM. Disaster Resilience Scorecard for Cities. Disaster Resilience Scorecard for Cities. UNISDR, 10 Mar. 2014. Web. <http://www.unisdr.org/2014/campaign-cities/Resilience%20Scorecard%20V1.5.pdf>.

[4] Allen, Joseph G., Piers Macnaughton, Usha Satish, Suresh Santanam, Jose Vallarino, and John D. Spengler. "Associations of Cognitive Function Scores with Carbon Dioxide, Ventilation, and Volatile Organic Compound Exposures in Office Workers: A Controlled Exposure Study of Green and Conventional Office Environments." EHP Environmental Health Perspectives 124.6 (2015): n. pag. Web.

All photos attributed to Architecture 2030

 

Hotels as Change Agents in 2030 Districts

Green Hotelier

November 19, 2015

In today’s Talking Point Joyce Lee and Megan Saunders describe how US hotels can be part of the 2030 Districts Project and help to create more sustainable cities.

What are 2030 Districts?

2030 Districts are private-public partnerships that bring property owners, managers and developers together with local governments, businesses, and community stakeholders to provide a business model for urban sustainability. The multi-purpose vision of the 2030 Districts Network is to onboard new cities to the 2030 District model, support peer exchange across Districts, store and share data, use the aggregate purchasing power of the District membership to secure reduced costs, create national partnership relationships, and influence policy making.

Ed Mazria of Architecture 2030 started the 2030 movement back in 2002 to raise awareness within the building sector of its environmental impact. The 2030 District goals for new buildings and major renovation are:

By 2015, 70% reduction in energy use below the national median (2003 national baseline);

By 2020, 80% reduction in energy use below the national median;

By 2025, 90% reduction in energy use below the national median;

By 2030, carbon neutral.

Existing buildings without major renovations, would strive for 50% energy reduction from the 2003 baseline.

Along with these targets, 2030 Districts also have standards for quantifying renewable energy, water and transportation (CO2 equivalents) reductions to help building owners and professionals compile more meaningful data for managing assets and planning new projects.

Stamford 2030 District

Stamford 2030 was created as a partnership between the Business Council of Fairfield County and the Connecticut Fund for the Environment. This mix of business interest and environmental advocacy is a key factor to the fast-growing partnership. To date, 67 member buildings have signed up, and a recent grant helped the District bring on board two full-time staff.

Downtown Stamford, while small compared to other districts, is unique in its proximity to a metropolis,

New York City, and therefore big business. Fairfield County hosts 29 headquarters of Fortune 1000 companies, 11 of which are in the Fortune 500. Connecticut electricity prices are among the highest in the continental US. Stamford is positioned to spearhead energy benchmarking in the state, as it is the second largest energy market in New England after Boston. The Stamford 2030 District also puts a special focus on resiliency, as it ties directly to business continuity. This is particularly relevant for a coastal city like Stamford, which is still recovering from Hurricane Sandy in 2012.

Most recently, Stamford 2030 convened a local constituency to work with IBM and AECOM, consultants to the United Nations Office of Disaster Risk Reduction (UNISDR), to be the first pilot to have completed a risk assessment from the UNISDR Resiliency Scorecard. Clearly stated in the Resiliency Scorecard assessment are categories in electricity, water and transportation and infrastructure readiness in times of emergency, which can be tied to the 2030 goals.

Case Study: Starwood Hotels

The density of world and regional headquarters in Stamford also provides an opportunity to share lessons learned by sheer market forces. The green building knowledge garnered through the Stamford 2030 District can be transferred far and wide through company internal policies and communications. A case in point is the Starwood Hotels and Resorts Worldwide, Inc. Corporate Headquarters at 1 Star Point which is LEED CI Platinum certified. Not only is the building poised to meet 2030 energy, water, and transportation standards readily using LEED submittal documentation, the headquarter staff is in a position to share sustainability practices among its worldwide resorts, office and hospitality locations.

The headquarters property, which is the first commercial space in Stamford to attain a LEED Platinum rating, features energy-conserving LED and CFL lighting, daylight harvesting, water-conserving plumbing fixtures, and locally-sourced materials to reduce excessive transportation of materials in the design. “As we have associates, owners, partners, and other stakeholders walking through our headquarters every day, our home office needed to reflect the values of our company and our commitment to sustainability,” says Andrea Pinabell, Vice President of Sustainability with Starwood Hotels. She goes on to say, “That is why you may not see all of the integrated sustainable design as you enter, but it is reflected throughout from lighting to material selection to airflow and operational efficiency. At Starwood, sustainability is just how we do business.”

Starwood also participates in other 2030 Districts, including Seattle whose members, The Westin and Sheraton Hotels, have committed to the national 2030 goals. This year the 2030 Summit was hosted in Cleveland and participants stayed at a Starwood Property – the Westin Cleveland – where many guests chose to participate in their sustainability program to reduce their footprints by electing to “make a green choice” by foregoing full housekeeping, which saves up to 49.2 gallons of water, 0.19 kWh of electricity, 25,000 BTU of natural gas, and 7oz. of cleaning product chemicals per night. This program reflects the company’s commitment to sustainability, which is further expressed by its aggressive goals to cut energy use by 30 percent, water use by 20 percent, and carbon emissions by 30 percent by 2020 at all of its hotels globally.

Vincent Martinez, Director of Development and Operations for Architecture 2030 adds: "The success of the 2030 Districts is built on the leadership of property developers, owners and managers. Together they highlight and share the great work they are doing towards achieving high levels of performance in their properties and the district as a whole. These leaders demonstrate what is possible in their sector across multiple markets, and provide a path for others to follow. The 2030 Districts are making progress towards their performance goals because of the efforts of their members and partners, like Starwood."

Joyce Lee

Joyce Lee, FAIA, LEED Fellow, is President of IndigoJLD providing green health services and design guidance on leading edge green projects. She has been an Architect Fellow at the National Leadership Academy for Public Health and one of the first LEED accredited professionals in New York City where she served as Chief Architect at NYC OMB.

Megan Saunders

Megan Saunders, LEED AP BD+C, ND, is Executive Director of the Stamford 2030 District, a public-private partnership that is part of a national network of cities using the nationally-recognized Architecture 2030 Challenge for Planning to create high-performance building districts. Previously, she was a Sustainability Project Manager at Vidaris, Inc. where she led corporate, design, and construction teams to implement sustainable environmental practices and achieve LEED ratings.