The Winners of the USGlass Green Design
Glass Gives These Projects
Performance and a View
It’s not uncommon to read an editorial
in the consumer press where the question is posed “Wouldn’t our buildings
be more efficient if we got rid of the glass altogether?”
Much to the glass industry’s chagrin, it’s a question that was echoed
earlier this year when the American Society of Heating, Refrigerating
and Air-Conditioning Engineers (ASHRAE) considered reducing in its 90.1
standard the amount of glass permissible in the envelope of commercial
buildings using the prescriptive path by a full 25 percent (that decision
was recently overturned—see page 10 for related story).
It is true that the single-pane glazing of yesterday easily transmitted
the summer heat and winter chill to buildings’ interiors, but today’s
products are able to provide a view and thermal performance. As the industry
has enthusiastically embraced the energy-efficiency bandwagon, more and
more glass products embody green in additional ways, such as using framing
with recycled materials and ceramic frits free of lead; integrating window
systems with sunshades, light louvers and other devices for optimizing
daylight; and promoting the many benefits that windows naturally offer,
such as natural ventilation, free daylighting and a healthy connection
to the outdoors.
In recognition of the many ways in which glass products promote the “green”
message, USGlass is acknowledging buildings in the categories of Active
Glazing, Retrofit and New Construction that show the world just how green
glass can be. These buildings were nominated by the readers of the USGNN.com™
Meet the Judges
This year’s judges for the Green Design Award reflect a diverse range
of experience in the building industry, although each has an intimate
familiarity with the green potential of glazing materials. The judges
• Benedict Tranel, architect and regional technical director at Gensler
in San Francisco;
• Kerry Haglund, LEED AP, senior research fellow with the Center for
Sustainable Building Research at the University of Minnesota; and
• Gregory A. Demirdjian, LEED AP BD+C, with glazing contractor MTH Industries
In selecting the buildings they felt best conveyed how glazing can contribute
to a building’s overall “greenness,” the judges considered a variety of
factors. Information was provided by the nominees, including building
certifications; glass type; framing type; the glazing products’ integration
with other building components; the glass choice’s contributions to cost
savings; “green” production and/or installation processes; and other information
that are unique to each building. The winning projects are noted on the
following pages along with all of the nominees.
ACTIVE GLAZING FINALIST
Chabot College Community and Student Services Center
Architect: tBP Architecture
Glazing contractor: Capital Glass Co. in Benicia, Calif.
Supplier(s): SAGE Electrochromics in Faribault, Minn.
How Glass Makes It Green: A key feature of the building is the
south facing 2-story atrium. Rather than impeding the views with screens
or blinds necessary to manage heat gain and glare in the atrium, approximately
2,900 square feet of electronically tintable glass was specified for the
atrium in 4- by 2 ½-foot panels, eight panels tall. The glazing
is divided into six control zones, each tied to the building’s energy
management system. Each zone can be dynamically tinted or cleared independently
to account for the location of the sun based on the time of day and year.
The use of dynamic glass to control the amount of sunlight entering the
atrium allowed the architects to create an HVAC-free space.
ACTIVE GLAZING -WINNER
National Renewable Energy
Laboratory’s Research Support Facility
The new Research Support Facility for the U.S. Department of Energy’s
(DOE) National Renewable Energy Laboratory (NREL) was created to be one
of the most energy-efficient and healthy workplaces in the world. As a
net-zero energy building, it was designed to produce as much power as
Architect: RNL in Denver
Glazing contractor: J.R. Butler Inc. in Denver
Supplier(s): Wausau Window and Wall Systems in Wausau, Wis.; SAGE
Electrochromics in Faribault, Minn.; Viracon in Owatonna, Minn.
How Glass Makes It Green: The project’s goals were to optimize
visible light and views; control the natural ventilation and unwanted
heat gain; and manage the abundant, natural light. At least eight different
glass types were specified, including electrochromic glazing and triple-pane
insulating glass units. Some of the 600 high-performance windows also
feature between-glass “light louvers” to push light deeper into the interior.
Every workstation has 100 percent daylighting, controlled by tintable
glazing in some cases and custom, exterior “bonnet” sunshades in others.
At night, the building’s climate sensors automatically open the clerestory
windows to purge unwanted heat from the building, naturally cooling it
for the next business day.
Glazing contractor: LinEl Signature in Mooresville, Ind.
Supplier(s): Oldcastle BuildingEnvelope™ in Santa Monica, Calif.;
PPG Industries in Pittsburgh; Solutia in St. Louis
How Glass Makes It Green: The historic skylights installed atop
the museum in 1897 featured ¼-inch clear wired glass. Although
the building owners were concerned with UV fading the artwork on the walls—as
well as poor thermal performance—maintaining the historic look was critical.
Ultimately the entire skylight was replaced with low-E coated laminated
insulating glass units of varying transparency. Five types of glass were
specified with various combinations of ceramic frits and opaque interlayers.
Empire State Building
This window upgrade was one part of an integrated project that is expected
to reduce energy use by 38 percent, save $4.4 million per year in energy
costs, and save a minimum of 105,000 metric tons of carbon dioxide over
the next 15 years. The project is said to have a 3-year payback.
Suppliers/Installers: Serious Materials in Sunnyvale, Calif.; Southwall
Technologies Inc. in Palo Alto, Calif.
How Glass Makes It Green: Unique to this project, all 6,500 windows
in the building was re-used rather than removed and replaced with new
glass. An approximately 5,000-square-foot production facility was set
up on the 5th floor of the Empire State Building to do this. As the original
insulating glass was removed from each window frame, at night so as not
to disturb building occupants, it was taken to the production facility
where workers would unseal the insulating glass, and clean both pieces.
Next, workers would assemble inside the original uncoated insulating glass
a coated film. The insulating performance of the updated IGUs increased
the R-value from about R-2 to between R-5 and R-8, depending on the location/orientation
of the window, while also reducing the solar heat gain by 50 percent.
The original thermally broken aluminum frames were updated with new weather-stripping
and hardware to improve the overall infiltration rates. Finally, each
unit would be resealed, and the “new” IGU would be put back in the original
window frames before the start of the next business day.
NEW CONSTRUCTION FINALISTS
SAP Headquarters Building
Architect: FXFOWLE Architects in New York
Glazing contractor: APG International in Glassboro, N.J.
Supplier(s): Viracon in Owatonna, Minn.
How Glass Makes It Green: The challenge on this project was to
design a building enclosure with continuous glazing that maximizes daylight
and views, while remaining energy-efficient. This was largely accomplished
through the use of high performance triple-glazed insulating glass units
incorporated into the curtainwall façade. The custom argon-filled,
low-E coated insulating glass units were shop-glazed into the energy-efficient
curtainwall framing system and installed onsite as a unitized curtainwall
system. The building’s sensor system is integrated with the exterior shading
devices incorporated in the glass curtainwall façade to automatically
adjust the light transmitted and help control the temperature level in
the facility. The floor-to-ceiling glass exterior and green roof integrate
the office with its natural surroundings to create an exceptional work
environment. SAP estimates that the building is one-third more energy-efficient
compared to conventional buildings using intelligent design features.
Westhampton Free Library
Westhampton Beach, N.Y.
Architect: Ward Associates P.C. in Bohemia, N.Y.
Glazing contractor: Sandpebble Builders Inc. in Southampton, N.Y.
Supplier(s): Kolbe & Kolbe Millwork Co. Inc. in Wausau, Wis.;
Cardinal Corp. in Eden Prairie, Minn.
How Glass Makes It Green: The architect chose 8-foot-high, oversized
windows mimicking traditional, cottage-style, double-hung windows to overlook
the 1,800-square-foot reading garden on the south side of the library,
maximizing daylighting. According to the architect, the high energy performance
of the windows helps the new library to reduce energy costs by 35-percent
below the ASHRAE 90.1 baseline building model.
Consol Energy Center
Architect: Populous in Kansas City, Mo.; Astorino in Pittsburgh
Glazing contractor: D-M Products Inc. in Bethel Park, Pa.; Universal
Glass & Metals Inc. in Detroit
Supplier(s): Kawneer in Norcross, Ga.
How Glass Makes It Green: Creating a feeling of openness throughout
the facility was a key design element, bolstered by the curtainwall, which
comprises the entire downtown-facing west side of the facility. Besides
providing views of the city, the serpentine-like glass façade allows
daylight to reach deep into the building. The curtainwall’s framing was
selected specifically to help enhance thermal performance and energy efficiency.
In addition, sunshades were used on the exterior of the facility to help
reduce solar heat gain; the 30-inch projections help shade interiors and
Architect: Graham Baba Architects in Seattle
Glazing contractor: Issaquah Glass Inc. in Issaquah, Wash.
Supplier(s): Technical Glass Products in Snoqualmie, Wash.
How Glass Makes It Green: Translucent in nature, the channeled glass disperses
light in a soft, even manner to avoid the negative effects of overly focused
sun, including unnecessary glare, shadows and heat transfer. The channels
also have up to 75 percent light transmission, helping to reduce the required
amount of electrical lighting. They have a solar heat-gain coefficient
of 0.70 and, since the building’s channel glass incorporates insulating
Nanogel® aerogel, their U-value is near 0.19. Thermally broken frames
further help prevent temperature transfer to the interior frame, as well
as condensation issues.
Architect: Klipp, Ricci Greene Associates in Denver and Harold Massop
Associates Architects in Denver
Glazing contractor: Trainor Glass in Alsip, Ill.
Supplier(s): Kawneer in Norcross, Ga.; Skyline Skylight in Colorado
How Glass Makes It Green: The east curtainwall, which uses recycled
billet, hangs 12 feet above the walking path. The connecting soffit is
a series of vent windows that are powered by motors to open inward and
upward. These windows are wired into the HVAC system and programmed to
open automatically when the conditions are right, flooding the atrium
with fresh air. In addition, the curtainwall was fabricated and glazed
less than 500 miles from the jobsite, helping contribute additional LEED®
certification points. The project’s LEED® Gold rating is currently
Children’s Medical Center
Architect: HKS Architects in Dallas, Texas
Glazing contractor: BHN Corp. in Memphis, Tenn.
Supplier(s): Vitro America in Memphis, Tenn.; Guardian Glass in
Auburn Hills, Mich.
How Glass Makes It Green: The medical center features nearly 90,000
square feet of high-performance insulating glass that contributes to the
buildings goal of saving 25 to 30 percent on overall energy costs. The
high-performance, low-E insulating glass was made due to the hot climate
that Memphis can bring. With a 0.23 solar heat gain coefficient, the glass
works in combination with the building’s other sustainable features to
meet the design team’s stated energy goals, and to provide a sharp and
Architect: HNTB Architecture in Washington, D.C.; The Collaborative
Inc. in Toledo, Ohio; Poggemeyer Architects in Bowling Green, Ohio
Glazing contractor: Toledo Mirror and Glass in Toledo, Ohio
Supplier(s): Pilkington in Toledo, Ohio; Oldcastle BuildingEnvelope™
in Santa Monica, Calif.
How Glass Makes It Green: The 8,000-seat arena, which opened in
October 2009, uses an energy-efficient combination of low-E in the glass
units for the approximately 25,000-square-foot exterior façade.
The low-E glass provides substantial energy savings and significantly
reduces demand on regulated energy systems. The combination used provides
good insulation as well as solar control benefits: it reduces the solar
heat gain, reflectivity and provides glare control for the Center. Glass
also was used for interior stair wells, balustrades and boxes to give
spectators the clearest possible view of the action taking place in the
Cyan Apartment Building
Architect: THA Architecture Inc. in Portland, Ore.
Glazing contractor: Toro Aluminum Ltd. in Portland, Ore.
Supplier(s): Guardian Glass in Auburn Hills, Mich.; Protemp Glass
Inc. in Concord, Ontario
How Glass Makes It Green: The community-focused apartment building
features community indoor and outdoor spaces, a green-roof and convenient
interior recycling collection—as well as high-performance glass to reduce
solar heat gain and provide a neutral appearance. Additional sustainable
elements include energy-efficient speed chillers and fan coil units for
heating and cooling. Overall energy savings are approximately 20 percent
better than code, saving $42,000 a year in energy costs.
Center RED Building
Architect: Pelli Clarke Pelli in New Haven, Conn., Gruen Associates
in Los Angeles
Glazing contractor: Permasteelisa in Windsor, Conn.
Supplier(s): SYP Glass in Shanghai; Ferro Corp. in Cleveland, Ohio
How Glass Makes It Green: The building features high-efficiency
double glazed windows with a “no-lead” red ceramic frit.
Manassas Park Elementary School
Architect: VMDO Architects in Charlottesville, Va.
Glazing contractor: Del-Ray Glass Co. Inc. in Alexandria, Va.
Supplier(s): PPG Industries in Pittsburgh
How Glass Makes It Green: The elementary school is designed as
a group of three houses, each with plenty of natural daylighting. Classrooms
in each house is oriented to face north or south, and are situated around
courtyards that maximize the ability of students to connect to the outdoors.
As a result of this design, the installed interior lighting power for
the school falls 38 percent below ASHRAE 90.1 requirements. Low-E glass
contributes high light transmission and exceptional solar control characteristics
as part of a high-performance envelope that incorporates tubular skylight,
solar-selective glazing and other technologies. The school also makes
use of projecting shade devices that control sunlight transmitted through
south-facing exposures, reflecting light louvers that maximize daylighting
from select window panes and sloped classroom ceilings that optimize natural
Watsonville Water Resources Center
Architect: WRNS Studio in San Francisco
Glazing contractor: Pacific Glazing Contractors in Morgan Hill, Calif.
Supplier(s): PPG Industries in Pittsburgh; Lane-Aire in Carson,
Calif.; Kawneer in Norcross, Ga.; NanaWall in Mill Valley, Calif.
How Glass Makes It Green: An east-west site orientation takes maximum
advantage of northern California’s abundant sunlight, while numerous interior
elements were planned to give occupants a direct visual and tactile connection
to the outdoors. Examples include a line of skylights that bathe the building’s
main central corridor in sunlight and private offices that are equipped
with glass sidelites and operable clerestory windows. These features,
together with automatic daylight control and daylight harvesting systems,
create constant interplay with the outdoors, not just through the views,
but also by providing occupants with the means to naturally (and energy-efficiently)
manage ambient light, temperature, air quality and ventilation. Barriers
between the indoors and outdoors are further reduced by large windows
at the end of each corridor and other strategically located skylights
that further minimize artificial lighting demands.
Hunters Point Shipyard
Glazing contractor: Ahlborn Structural Steel in Santa Rosa, Calif.
Supplier(s): YKK AP in Dublin, Ga.; PPG Industries in Pittsburgh
How Glass Makes It Green: The Center is expected to use 30 percent less
energy than required by California Title 24 Energy Code. This feat is
achieved through multiple design strategies, including high-performance
glazing and shading, as well as the addition of photovoltaics. The large
amount of vision area with high-performance low-E glass on the north faces
of the building, along with the high clerestory windows, promote daylighting
while minimizing heat gain. The building is predicted to require 83 percent
less heating, 55 percent less cooling and 54 percent less lighting energy
than a typical building located within the state.
1 Bank of America Center
Architect: Perkins + Will in Chicago
Glazing contractor: Trainor Glass in Alsip, Ill.
Supplier(s): PPG Industries in Pittsburgh
How Glass Makes It Green: Among the architect’s requirements was
a glass with high visible light transmission for the indoors vegetation,
as well as the aesthetics. The prevalent use of glass allows for lush
interior forestry, most evident in the “Urban Garden,” a soaring six-story
atrium that serves as an informal gathering spot for tenants and visitors
to downtown Charlotte.
Michael J. Homer Science & Student Life Center
Architect: Leddy Maytum Stacy Architects in San Francisco
Glazing contractor: U.S. Glass & Aluminum in Pittsburg, Calif.
Supplier(s): PPG Industries in Pittsburgh
How Glass Makes It Green: Low-E glass is part of a high-performance building
envelope that is oriented to maximize daylighting and reduce the need
for artificial, heating, cooling and lighting. Ninety-eight percent of
occupied spaces in the building have views of the outdoors and 55 percent
of all building spaces use daylight as the primary light source. In addition,
the building uses building integrated photovoltaics to generate electricity
Manitoba Hydro Place
Winnipeg, Manitoba, Canada
Manitoba Hydro Place integrates a variety of sustainable technologies
to create a “living building” that dynamically responds to the local climate.
A biodynamic double façade is the building’s pubic face and also
one of its most vital sustainable components.
Architect: Kuwabara Payne McKenna Blumberg Architect in Toronto; Smith
Carter Architects & Engineers in Winnipeg, Manitoba
Glazing contractor: Fergson Neudorf Glass Inc. in St. Catharines,
Ontario; Border Glass & Aluminum in Winnipeg, Manitoba
Supplier(s): Viracon in Owatonna, Minn.; PPG Industries in Pittsburgh
How Glass Makes It Green: The building’s unique, double façade
curtainwall system is comprised of an insulating glass outer wall with
a monolithic inner wall, separated by a three-foot buffer zone. A low-iron
glass substrate with a low-E coating offer both high light transmission
and powerful solar energy control, with a visible light transmittance
of 80 percent that allows daylight to penetrate the floor-to-ceiling glazing
and reach deep into the building’s core. Its low U-values reduce radiant
heat transfer and improve the building’s overall energy performance. Automated
exterior wall vents in the outer curtainwall (controlled by the building
management system) allow fresh air into the building, year-round. Manually
operated windows on the interior curtainwall allow employees to control
their individual environment, which studies have shown enhances employee
well-being and productivity while reducing absenteeism. Even in a city
known for its extreme climate, the 695,000-square-foot tower uses less
than one-quarter of the energy used by a typical large-scale North American
office tower located in a more temperate climate.
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