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Today, about 40% of all buildings in the U.S. still have single-pane windows, and ~70% of the existing building stock is estimated to suffer from under-performing facades. Experts project that 20-40% of the total energy savings in buildings—the #1 end users of energy—to be from windows and building envelopes. Thus, the demand for energy-efficiency facade and window retrofits/upgrades is estimated to grow rapidly over the coming years due to the rapid adoption of energy-efficiency regulations for existing buildings, which in turn, are influencing the real-estate market.
The problem is that window replacement is a highly intrusive and costly solution that is often carried out only when the windows reach the end of their service-life and must be replaced. Additionally, most glazing systems—including the current ones—are designed with little consideration (if any) given to their inevitable retrofit during the service-life of the building. Thus, most facade and window retrofit practices are often considered not feasible as well due to the associated complexity, building and business disruption, and long payback period.
This paper presents the concept of Inovues’ patent-pending, external window upgrade system and non-intrusive facade retrofit method. The technology provides a cost-effective and sustainable solution for upgrading the old/inefficient, single- or double-glazed curtainwalls to high-performing double- or triple-glazed systems without requiring any replacement or causing building or business disruption. A case study using Lever House in NYC is presented, which is one of several performed to analyze the visual impact, thermal performance, payback, and ROI. The results showed an improvement of over 50% in the total system U-Factor; over 250% increase in condensation resistance; ~15% improvement in thermal comfort in the perimeter areas; nearly 20% energy savings; and ~85% shorter payback period (compared to replacement) with ~300% ROI over the estimated 20-25-year service-life of the system.
In the United States—the second largest energy consumer and greenhouse gas emitter in the world after China—most GHG emissions come from energy consumption and production (84% in 2014), and carbon
Despite the steady and fast growth over the past few years and the projected increase in demand in the future, the building envelope energy-efficiency market is still considered a largely
An external window-upgrade system “glazing shield” and a non-intrusive facade retrofit method are being developed. The objective is to provide a cost-effect and sustainable solution for upgrading the inefficient single-
Several before-and-after system-based and building-based analysis studies were performed on different glazing systems and existing buildings to analyze the overall impact and feasibility of the glazing shields. This includes visual
Key AttributesDesigned by Gordon Bunshaft of SOM and built in 1952 (Fig. 5).2nd curtainwall building in New York City.Designated as a New York City landmark in 1982 and was
Summary of the System-Based Simulation Results at Lever HouseOpt 1 improved the thermal transmittance (U-Factor) of the curtainwall system by 53.4% and the condensation resistance (CR) by 238.5%.Opt 1a
The purpose of this paper is to present the concept of a patent-pending, external window upgrade system and non-intrusive facade retrofit method. The technology would work with most types of
Apte, Joshua S., and Dariush K. Arasteh. 2006. “Window-Related Energy Consumption in the US Residential and Commercial Building Stock”. Lawrence Berkeley National Laboratory. LBNL-60146. Retrieved November 21, 2016. https://facades.lbl.gov/publications/window-related-energy-consumption-us.
Architecture 2030. 2013. “WHY THE BUILDING SECTOR?”. Accessed November 12, 2016. http://architecture2030.org/buildings_problem_why/.
BLS. 2017. “Average Energy Prices, New York-Northern New Jersey-Long Island – February 2017”. U.S. Bureau of Labor Statistics, Mar 17, 2017. Accessed May 06, 2017. https://www.bls.gov/regions/new-york-new-jersey/news-release/averageenergyprices_newyorkarea.htm.
Chambers, Neil. 2009. “New York City and Energy Code Changes”. Treehugger, 26 Oct 2009. Accessed December 11, 2016. http://www.treehugger.com/sustainable-product-design/new-york-city-and-energy-code-changes.html.
Curcija, Charlie, Howdy Goudey, Robin Mitchell. 2017. “Low-e Applied Film Window Retrofit for Insulation and Solar Control”. Prepared by the Lawrence Berkeley National Lab (LBNL) for the U.S. General Services Administration (GSA), Feb 2017. Retrieved April 9, 2017. https://gsa.gov/portal/getMediaData?mediaId=155930.
DOE. 2017. “Building Performance Database”. U.S. Department of Energy (DOE). Accessed March 31, 2017. https://energy.gov/eere/buildings/building-performance-database.
EIA. 2016. “What are greenhouse gases and how much are emitted by the United States?”. U.S. Energy Information Administration (EIA), 20 January 2016. Accessed November 12, 2016. https://www.eia.gov/energy_in_brief/article/greenhouse_gas.cfm.
——. 2015. “A Look at the U.S. Commercial Building Stock: Results from EIA’s 2012 Commercial Buildings Energy Consumption Survey (CBECS)”. U.S. Energy Information Administration (EIA), 04 March 2015. Accessed December 2, 2016. https://www.eia.gov/consumption/commercial/reports/2012/buildstock/.
Enclos. 2013. “New Skins, Old Bones: Facade Retrofits for Tall Curtainwall Buildings”. Enclos corp, 08 August 2013. Accessed November 12, 2016. http://www.enclos.com/site-info/news/enclos-presents-new-skins-old-bones-facade-retrofits-for-tall-curtainwall-b.
——. 2012. “ENCLOS - New Skins for Old Bones: Facade Retrofits for Tall Curtainwall Buildings”. Presented by Mic Patterson at the Metals in Construction Facades Conference, 16 February 2012. Retrieved February 08, 2016. https://issuu.com/archpaper/docs/_2_enclos_patterson_final.
Enerdata. 2016. “Global Energy StatisticalYearbook 2016.” Accessed November 12, 2016. https://yearbook.enerdata.net/.
ESB. 2009. “Empire State Building Case Study”. Empire State Building, 2009. Retrieved December 2, 2016. http://www.esbnyc.com/sites/default/files/ESBOverviewDeck.pdf.
Habibzadeh, Bahman. 2015. “WINDOWS AND BUILDING ENVELOPE OVERVIEW - 2015 BTO PEER REVIEW”. U.S. Department of Energy (DOE), 2015. Retrieved November 17, 2016. http://energy.gov/eere/buildings/downloads/windows-and-building-envelope-overview-2015-bto-peer-review.
Holness, Gordon V.R. 2008. “Improving energy efficiency in existing buildings.” ASHRAE Journal, vol. 50, no. 1, 2008, p. 12+. Academic OneFile, Accessed November 19, 2016. https://search.proquest.com/openview/75ae4dd6272be4362fb0ccaf9b58580a/1?pq-origsite=gscholar&cbl=41118.
IEA. 2013. “Technology Roadmap: Energy Efficient Building Envelope”. International Energy Agency (IEA), Dec 2013. Retrieved November 17, 2016. https://www.iea.org/publications/freepublications/publication/technology-roadmap-energy-efficient-building-envelopes.html.
Long, Jane C. S. 2011. “California’s Energy Future - The View to 2050”. California Council on Science and Technology, May 2011. Retrieved November 20, 2016. http://ccst.us/publications/2011/2011energy.pdf.
Martinez, Andrea, and Mic Patterson. 2013. “Existing Building Retrofit Survey Report”. University of Southern California, September 2013. Retrieved July 29, 2017. http://www.enclos.com/library-pdfviewer/USC_Existing%20Buildings%20Retrofit%20Survey%20Results.pdf?enclos.com/library-pdfviewer/USC_Existing%20Buildings%20Retrofit%20Survey%20Results.pdf.
McGraw-Hill. 2011. “Business Case for Energy Efficient Building Retrofit and Renovation”. McGraw-Hill Construction, Smart Market Report, 2011. Retrieved December 20, 2016. https://energy.gov/sites/prod/files/2013/12/f5/business_case_for_energy_efficiency_retrofit_renovation_smr_2011.pdf
Navigant. 2016. “ADVANCED ENERGY NOW 2016 MARKET REPORT: Global and U.S. Markets by Revenue 2011-2015 and Key Trends in Advanced Energy Growth”. Prepared by Navigant Research for Advanced Energy Economy (AEE), March 2016. Retrieved March 31, 2017. http://info.aee.net/hubfs/PDF/AEN-2016-Market-Report.pdf?t=1464027401576.
NYC. 2016. “New York City Energy & Water Performance Map”. The Mayor’s Office of Sustainability and New York University’s Center for Urban Science and Progress. Accessed November 02, 2016. https://serv.cusp.nyu.edu/projects/evt/.
——. 2016b. “One City: Built to Last, Technical Working Group Report”. The Official Website of the City of New York, Apr 2016. This report lays out the Mayor’s plan for how to reduce citywide carbon emissions 80 percent by 2050 by improving energy efficiency in New York City’s buidlings, 2nd Edition. Retrieved November 20, 2016. http://www1.nyc.gov/assets/sustainability/downloads/pdf/publications/TWGreport_04212016.pdf.
——.2016c. “Mayor Announces Major New Steps to Dramatically Reduce NYC Buildings’ Greenhouse Gas Emissions.” The Official Website of the City of New York, 22 Apr 2016. Accessed December 07, 2016. http://www1.nyc.gov/office-of-the-mayor/news/386-16/onenyc-mayor-de-blasio-major-new-steps-dramatically-reduce-nyc-buildings-greenhouse.
Patterson, Mic. 2012. “CTBUH 9th World Congress concludes in Shanghai”. Enclos corp, 22 September 2012. Accessed November 26, 2016. http://www.enclos.com/site-info/news/ctbuh-9th-world-congress-concludes-in-shanghai.
Schiff, Eric. 2014. “Single-pane Window Efficiency”. Advanced Research Projects Agency-Energy (ARPA-E), 07 November 2014. Retrieved July 20, 2017. https://arpa-e.energy.gov/sites/default/files/02%20-%20Schiff%20-%20Single%20Pane%20Window%20Opportunity%20-%20FINAL.pdf.
Synavax. 2017. “Energy Protect™ Clear Insulation and Protective Coating for Homes & Buildings”. Synavax. Accessed March 23, 2017. http://www.synavax.com/product/energy-protect/.
UNEP. 2009. “Buildings and Climate Change - Summary for Decision-Makers”. United Nations Environment Program (UNEP) 2009. Retrieved November 12, 2016. http://staging.unep.org/SBCI/pdfs/SBCI-BCCSummary.pdf.
UNEP FI. 2014. “COMMERCIAL REAL ESTATE: UNLOCKING THE ENERGY EFFICIENCY RETROFIT INVESTMENT OPPORTUNITY”. The United Nations Environment Program Finance Initiative (UNEP FI), Feb 2014. Retrieved December 20, 2016. http://www.unepfi.org/publications/investment-publications/property-publications/commercial-real-estate-unlocking-the-energy-efficiency-retrofit-investment-opportunity/.
Wright, J.L. 2014. “The Use of Indoor Surface Low-e Coatings: The Implications Regarding Condensation Resistance”. Presented at the ARPA-E Workshop on Single-pane Window Efficiency, November 2014. Retrieved March 03, 2017. https://arpa-e.energy.gov/sites/default/files/04%20-%20Wright%20ARPA-E-2014_r2%20-%20FINAL.pdf.
WWF. 2015. “Biggest US Cities Setting Unprecedented Emissions Reductions Goals to Fight Climate Change”. World Wildlife Fund (WWF) and ICLEI-Local Governments for Sustainability, 06 August 2015. Retrieved December 10, 2016. https://www.worldwildlife.org/press-releases/biggest-us-cities-setting-unprecedented-emissions-reductions-goals-to-fight-climate-change.