Launch Slideshow

Kroon Hall, the new home for the School of Forestry and Environmental Studies at Yale University, is an ultra-green building targeting LEED Platinum. Meant to serve as teaching tools for the students within, the sustainable initiatives are on display where possible, but some--such as the creation of courtyards for students to gather and study outdoors--are more about good planning.

Kroon Hall

The new School of Forestry and & Environmental Studies at Yale sets a new standard for sustainability on campus.

Kroon Hall

The new School of Forestry and & Environmental Studies at Yale sets a new standard for sustainability on campus.

  • Kroon Hall, the new home for the School of Forestry and Environmental Studies at Yale University, is an ultra-green building targeting LEED Platinum. Meant to serve as teaching tools for the students within, the sustainable initiatives are on display where possible, but some--such as the creation of courtyards for students to gather and study outdoors--are more about good planning.

    http://www.architectmagazine.com/Images/tmp6637%2Etmp_tcm20-224196.jpg

    true

    Kroon Hall, the new home for the School of Forestry and Environmental Studies at Yale University, is an ultra-green building targeting LEED Platinum. Meant to serve as teaching tools for the students within, the sustainable initiatives are on display where possible, but some--such as the creation of courtyards for students to gather and study outdoors--are more about good planning.

    600

    Morley von Sternberg

    Kroon Hall, the new home for the School of Forestry and Environmental Studies at Yale University, is an ultra-green building targeting LEED Platinum. Meant to serve as teaching tools for the students within, the sustainable initiatives are on display where possible, but some—such as the creation of courtyards for students to gather and study outdoors—are more about good planning.

  • The building has large skylights that admit daylight and also expose the rooftop photovoltaic system. Translucent enough to still allow light to filter through, the 100-kilowatt array provides 25 percent of the energy for the building, the rest of which will be purchased from sustainable sources. - Skylight - Wasco Skylight Products - Custom skylight system - wascoskylights.com - Ceiling beams - Goodlam, a division of Goodfellow - Structural red oak glulam beams - goodfellowinc.com - Doors - Builders Hardware - Custom doors - builders-hardware.net

    http://www.architectmagazine.com/Images/tmp6603%2Etmp_tcm20-223999.jpg

    true

    The building has large skylights that admit daylight and also expose the rooftop photovoltaic system. Translucent enough to still allow light to filter through, the 100-kilowatt array provides 25 percent of the energy for the building, the rest of which will be purchased from sustainable sources. - Skylight - Wasco Skylight Products - Custom skylight system - wascoskylights.com - Ceiling beams - Goodlam, a division of Goodfellow - Structural red oak glulam beams - goodfellowinc.com - Doors - Builders Hardware - Custom doors - builders-hardware.net

    600

    Morley von Sternberg

    The building has large skylights that admit daylight and also expose the rooftop photovoltaic system. Translucent enough to still allow light to filter through, the 100-kilowatt array provides 25 percent of the energy for the building, the rest of which will be purchased from sustainable sources.

    Skylight
    Wasco Skylight Products
    Custom skylight system
    wascoskylights.com

    Ceiling Beams
    Goodlam, a division of Goodfellow
    Structural red oak glulam beams
    goodfellowinc.com

    Doors
    Builders’ Hardware
    Custom doors
    builders-hardware.net
  • http://www.architectmagazine.com/Images/tmp6604%2Etmp_tcm20-224006.jpg

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    Courtesy Hopkins Architects

  • The east and west ends of the building feature a metal and glass curtain wall shaded by laminated Douglas fir arches and louvers to prevent glare and heat gain. The main entrance is actually on the second floorthe first floor is inset into a hill, and only the south side has access to a colonnade and courtyard. - Curtain wall - Kawneer North America - Custom metal and glass curtain wall - kawneer.com - Sunshading - Goodlam, a division of Goodfellow - Douglas fir arch and louvers - goodfellowinc.com - Roofing - Follansbee Roofing - Sloped metal roofing - follansbeeroofing.com

    http://www.architectmagazine.com/Images/tmp6638%2Etmp_tcm20-224203.jpg

    true

    The east and west ends of the building feature a metal and glass curtain wall shaded by laminated Douglas fir arches and louvers to prevent glare and heat gain. The main entrance is actually on the second floorthe first floor is inset into a hill, and only the south side has access to a colonnade and courtyard. - Curtain wall - Kawneer North America - Custom metal and glass curtain wall - kawneer.com - Sunshading - Goodlam, a division of Goodfellow - Douglas fir arch and louvers - goodfellowinc.com - Roofing - Follansbee Roofing - Sloped metal roofing - follansbeeroofing.com

    600

    Morley von Sternberg

    The east and west ends of the building feature a metal and glass curtain wall shaded by laminated Douglas fir arches and louvers to prevent glare and heat gain. The main entrance is actually on the second floor—the first floor is inset into a hill, and only the south side has access to a colonnade and courtyard.

    Curtain Wall
    Kawneer North America
    Custom metal and glass curtain wall
    kawneer.com

    Sunshading
    Goodlam, a division of Goodfellow
    Douglas fir arch and louvers
    goodfellowinc.com

    Roofing
    Follansbee Roofing
    Sloped metal roofing
    follansbeeroofing.com
  • http://www.architectmagazine.com/Images/tmp6639%2Etmp_tcm20-224210.jpg

    true

    600

    Morley von Sternberg

  • In an effort to use local materials and aesthetically link the modern building with the neighboring Collegiate Gothic stone structures on campus, the architects turned to sandstone. Windows along this south facade are either deeply inset into precast concrete--a mixture in which 50 percent of the required cement was replaced with ground granulated blast-furnace slag, to recycle waste material and reduce CO2 emissionsor sunshaded to reduce heat gain while still maximizing daylight and views. - Concrete - Rex Precast Systems - Precast concrete - rexprecast.com - Masonry - The Briar Hill Stone Co. - Sandstone masonry - briarhillstone.com - Photovoltaics - SunPower - Model 225 solar photovoltaic panel - us.sunpowercorp.com

    http://www.architectmagazine.com/Images/tmp663B%2Etmp_tcm20-224224.jpg

    true

    In an effort to use local materials and aesthetically link the modern building with the neighboring Collegiate Gothic stone structures on campus, the architects turned to sandstone. Windows along this south facade are either deeply inset into precast concrete--a mixture in which 50 percent of the required cement was replaced with ground granulated blast-furnace slag, to recycle waste material and reduce CO2 emissionsor sunshaded to reduce heat gain while still maximizing daylight and views. - Concrete - Rex Precast Systems - Precast concrete - rexprecast.com - Masonry - The Briar Hill Stone Co. - Sandstone masonry - briarhillstone.com - Photovoltaics - SunPower - Model 225 solar photovoltaic panel - us.sunpowercorp.com

    600

    Robert Benson

    In an effort to use local materials and aesthetically link the modern building with the neighboring Collegiate Gothic stone structures on campus, the architects turned to sandstone. Windows along this south facade are either deeply inset into precast concrete—a mixture in which 50 percent of the required cement was replaced with ground granulated blast-furnace slag, to recycle waste material and reduce CO2 emissionsÑor sunshaded to reduce heat gain while still maximizing daylight and views.

    Concrete
    Rex Precast Systems
    Precast concrete
    rexprecast.com

    Masonry
    The Briar Hill Stone Co.
    Sandstone masonry
    briarhillstone.com

    Photovoltaics
    SunPower
    Model 225 solar photovoltaic panel
    us.sunpowercorp.com
  • A student center at the west end of the third floor provides space for individual or group study. The space is differentiated from the rest of the largely open floor by a change in flooring--from modular carpet tile to hardwood. One-third of the wood used in the building came from Yale's own sustainably run forests, and serves as a good in-house example of green practices for the students in the forestry program. - Tables - Fairhaven Furniture - Custom tables - fairhaven-furniture.com - Building management system and HVAC controls - Automated Logic Corp. - Customized building management software system - automatedlogic.com

    http://www.architectmagazine.com/Images/tmp663C%2Etmp_tcm20-224234.jpg

    true

    A student center at the west end of the third floor provides space for individual or group study. The space is differentiated from the rest of the largely open floor by a change in flooring--from modular carpet tile to hardwood. One-third of the wood used in the building came from Yale's own sustainably run forests, and serves as a good in-house example of green practices for the students in the forestry program. - Tables - Fairhaven Furniture - Custom tables - fairhaven-furniture.com - Building management system and HVAC controls - Automated Logic Corp. - Customized building management software system - automatedlogic.com

    600

    Robert Benson

    A student center at the west end of the third floor provides space for individual or group study. The space is differentiated from the rest of the largely open floor by a change in flooring—from modular carpet tile to hardwood. One-third of the wood used in the building came from Yale's own sustainably run forests, and serves as a good in-house example of green practices for the students in the forestry program.

    Tables
    Fairhaven Furniture
    Custom tables
    fairhaven-furniture.com

    Building management system and HVAC controls
    Automated Logic Corp.
    Customized building management software system
    automatedlogic.com
  • The large open volume on the third floor is split into several sections. Two smaller classrooms are enclosed in a volume along the south wall, with a break out area with cafe tables on the north side. A student center and auditorium anchor the ends. Windows are operable to allow natural ventilation into the space, and lights at each window indicate whether the central HVAC system (which runs air in an under-floor plenum) is operating. The system is turned off during the mild spring and fall seasons to reduce energy usage. - Side Chairs - Kusch  Co. - Luca chairs - kusch.com - Lighting Controls - Sensor Switch - nLight control system - sensorswitch.com

    http://www.architectmagazine.com/Images/tmp663D%2Etmp_tcm20-224246.jpg

    true

    The large open volume on the third floor is split into several sections. Two smaller classrooms are enclosed in a volume along the south wall, with a break out area with cafe tables on the north side. A student center and auditorium anchor the ends. Windows are operable to allow natural ventilation into the space, and lights at each window indicate whether the central HVAC system (which runs air in an under-floor plenum) is operating. The system is turned off during the mild spring and fall seasons to reduce energy usage. - Side Chairs - Kusch Co. - Luca chairs - kusch.com - Lighting Controls - Sensor Switch - nLight control system - sensorswitch.com

    600

    Robert Benson

    The large open volume on the third floor is split into several sections. Two smaller classrooms are enclosed in a volume along the south wall, with a break out area with cafe tables on the north side. A student center and auditorium anchor the ends. Windows are operable to allow natural ventilation into the space, and lights at each window indicate whether the central HVAC system (which runs air in an under-floor plenum) is operating. The system is turned off during the mild spring and fall seasons to reduce energy usage.

    Side Chairs
    Kusch + Co.
    Luca chairs
    kusch.com

    Lighting Controls
    Sensor Switch
    nLight control system
    sensorswitch.com
  • A study area on the south face of the building's ground floor looks out onto a colonnade and courtyard that students can use as an outdoor study and socializing area during the warmer months. Previously occupied by parking lots and a gas power plant, the new outdoor space better connects with the other campus buildings. Operable windows allow natural ventilation and communication back and forth between students inside and out. - Carpet - InterfaceFLOR - Menagerie modular carpet tiles - interfaceflor.com - Windows - Marvin Windows and Doors - Custom windows - marvin.com - Lounge seating - B1 sofa - Bernhardt Design - bernhardtdesign.com

    http://www.architectmagazine.com/Images/tmp663E%2Etmp_tcm20-224253.jpg

    true

    A study area on the south face of the building's ground floor looks out onto a colonnade and courtyard that students can use as an outdoor study and socializing area during the warmer months. Previously occupied by parking lots and a gas power plant, the new outdoor space better connects with the other campus buildings. Operable windows allow natural ventilation and communication back and forth between students inside and out. - Carpet - InterfaceFLOR - Menagerie modular carpet tiles - interfaceflor.com - Windows - Marvin Windows and Doors - Custom windows - marvin.com - Lounge seating - B1 sofa - Bernhardt Design - bernhardtdesign.com

    600

    Robert Benson

    A study area on the south face of the building's ground floor looks out onto a colonnade and courtyard that students can use as an outdoor study and socializing area during the warmer months. Previously occupied by parking lots and a gas power plant, the new outdoor space better connects with the other campus buildings. Operable windows allow natural ventilation and communication back and forth between students inside and out.

    Carpet
    InterfaceFLOR
    Menagerie modular carpet tiles
    interfaceflor.com

    Windows
    Marvin Windows and Doors
    Custom windows
    marvin.com

    Lounge seating
    B1 sofa
    Bernhardt Design
    bernhardtdesign.com
  • A central staircase and lightwell allow light from the third floor skylights to reach the office corridors on the third floor. Natural light is maximized and supplemented by energy-efficient fixtures such as Gammalux downlights and occupancy and light level sensors by Sensor Switch. - Downlights - Gammalux Systems - GR4B-132T8 interior downlight - gammalux.com - Wall Finishes - Legere Woodworking - 100 percent FSC-certified wall paneling - legeregroup.com

    http://www.architectmagazine.com/Images/tmp663F%2Etmp_tcm20-224260.jpg

    true

    A central staircase and lightwell allow light from the third floor skylights to reach the office corridors on the third floor. Natural light is maximized and supplemented by energy-efficient fixtures such as Gammalux downlights and occupancy and light level sensors by Sensor Switch. - Downlights - Gammalux Systems - GR4B-132T8 interior downlight - gammalux.com - Wall Finishes - Legere Woodworking - 100 percent FSC-certified wall paneling - legeregroup.com

    600

    Robert Benson

    A central staircase and lightwell allow light from the third floor skylights to reach the office corridors on the third floor. Natural light is maximized and supplemented by energy-efficient fixtures such as Gammalux downlights and occupancy and light level sensors by Sensor Switch.

    Downlights
    Gammalux Systems
    GR4B-132T8 interior downlight
    gammalux.com

    Wall Finishes
    Legere Woodworking
    100 percent FSC-certified wall paneling
    legeregroup.com
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    Courtesy Hopkins Architects

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    600

    Courtesy Hopkins Architects

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    600

    Courtesy Hopkins Architects

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    Courtesy Hopkins Architects

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    600

    Courtesy Hopkins Architects

  • Kroon Hall has several types of classrooms to accommodate different styles of courses. This auditorium has theater seating and acoustic material behind red oak slats along the back wall to prevent sound reverberation. The Douglas firlaminated louvers on the exterior admit daylight while at the same time reducing glare. - Sunshading - MechoShade Systems - ElectroShade system for motorized shades - mechoshade.com - Millwork - Legere Woodworking - Cabinetwork and custom woodwork - legeregroup.com

    http://www.architectmagazine.com/Images/tmp6601%2Etmp_tcm20-223985.jpg

    true

    Kroon Hall has several types of classrooms to accommodate different styles of courses. This auditorium has theater seating and acoustic material behind red oak slats along the back wall to prevent sound reverberation. The Douglas firlaminated louvers on the exterior admit daylight while at the same time reducing glare. - Sunshading - MechoShade Systems - ElectroShade system for motorized shades - mechoshade.com - Millwork - Legere Woodworking - Cabinetwork and custom woodwork - legeregroup.com

    600

    Morley von Sternberg

    Kroon Hall has several types of classrooms to accommodate different styles of courses. This auditorium has theater seating and acoustic material behind red oak slats along the back wall to prevent sound reverberation. The Douglas fir–laminated louvers on the exterior admit daylight while at the same time reducing glare.

    Sunshading
    MechoShade Systems
    ElectroShade system for motorized shades
    mechoshade.com

    Millwork
    Legere Woodworking
    Cabinetwork and custom woodwork
    legeregroup.com
  • A classroom on the third floor features power at every seat so students can plug in their laptops. An LCD projector is set up for PowerPoint and video presentations. - Wall washer Light Fixtures - Winona Lighting - P5 wall-mount wall washing fixture - winonalighting.com - Steel - Capco Steel - Structural steel with up to 95 percent recycled content - capcosteelco.com

    http://www.architectmagazine.com/Images/tmp6602%2Etmp_tcm20-223992.jpg

    true

    A classroom on the third floor features power at every seat so students can plug in their laptops. An LCD projector is set up for PowerPoint and video presentations. - Wall washer Light Fixtures - Winona Lighting - P5 wall-mount wall washing fixture - winonalighting.com - Steel - Capco Steel - Structural steel with up to 95 percent recycled content - capcosteelco.com

    600

    Morley von Sternberg

    A classroom on the third floor features power at every seat so students can plug in their laptops. An LCD projector is set up for PowerPoint and video presentations.

    Wall Washer Light Fixtures
    Winona Lighting
    P5 wall-mount wall washing fixture
    winonalighting.com

    Steel
    Capco Steel
    Structural steel with up to 95 percent recycled content
    capcosteelco.com
Green design is an attractive alternative these days. But given the eco-friendly mission of the School of Forestry and Environmental Studies at Yale University in New Haven, Conn., building green was not an option. It was an imperative.

In planning their new $33.5 million building, school administrators not only sought to create a healthy place to study and work, they also wanted to bridge the gap between nature and people, deep in the heart of the city. That goal was met with aplomb by Hopkins Architects, of London, whose Kroon Hall—designed to consume half the energy of an equivalent academic building and reduce greenhouse gas emissions by 62 percent—is targeted to achieve LEED Platinum.

A blend of optimal performance and good design, the new home to faculty offices and an environmental resource center cuts a contemporary image while fitting comfortably among the venerable landmarks of Yale. “The challenge was to convert a backyard into a nice place,” says Hopkins director Michael Taylor. A gas-fired power plant, parking lot, and assorted dumpsters were removed from the site, replaced by the new academic center and two courtyards that knit the campus together. “That’s a big win,” Taylor adds.

Working with executive architect Centerbrook Architects and Planners and sustainability consultant Atelier Ten, Hopkins created a 58,000-square-foot facility whose tall, narrow shape and east-west orientation reinforce the active and passive strategies used to heat and cool it. The lowest floor is set into a hillside, with only its south side exposed, providing thermal insulation and increasing the amount of natural light that enters the building from adjacent courtyards. A south-facing colonnade encourages activity to spill outside.

Thick walls of Briar Hill sandstone on the north and south façades have operable, high-performance windows set deep within precast concrete surrounds to shade from summer sun. Raised above the walls is a barnlike roof supported by arched frames of laminated Douglas fir. The roofline, lined in red oak (half of which comes from Yale’s own forests), creates a third-floor loft that houses an auditorium, two classrooms, a café, and a large common room.

As part of the design process, the team evaluated some 25 different sustainable measures to determine which were most cost- and energy-efficient. A 100-kilowatt photovoltaic array on the rooftop proved most desirable. It supplies 25 percent of the building’s electrical need. (The remaining electricity will be purchased from renewable sources, allowing the building to meet its goal of carbon neutrality.) In addition, four solar panels embedded in the southern façades help provide the building with hot water. Heating and cooling is provided by ground-source heat pumps that draw water from four 1,500-foot-deep wells near the building.

Integral to the building’s design is a displacement ventilation system that moves air through a plenum and into occupied spaces through diffusers in the raised floors. Low-velocity fans in the basement keep the air circulating almost imperceptibly. Fresh air is fed into the building through this system in summer and winter. But in spring and fall the mechanical systems are shut down, and occupants (prompted by color-coded lights) open the windows for ventilation.

A rainwater harvesting system channels water from the roof and grounds to a garden in the south courtyard, where aquatic plants filter out sediment and contaminants. The graywater is then used for landscape irrigation or pumped back into Kroon Hall for flushing toilets. In tandem with low-flow fixtures, the system is expected to save more than 500,000 gallons of potable city water per year.

Just four years ago, Yale President Richard Levin pledged to achieve a 43 percent reduction in Yale’s greenhouse gas emissions by 2020. With the completion of Kroon Hall, the most sustainable building on campus, the university has taken concrete steps to achieve that goal.


  • Sir Michael Hopkins, Chairman, Hopkins Architects
    Sir Michael Hopkins, Chairman, Hopkins Architects
  • Michael Taylor, Director, Hopkins Architects
    Michael Taylor, Director, Hopkins Architects
  • Mark Simon, Partner, Centerbrook Architects and Planners
    Mark Simon, Partner, Centerbrook Architects and Planners


Project Kroon Hall
Location New Haven, Conn.
Client Yale University—John Bollier (associate vice president of facilities); Laura Cruickshank (university planner); Sam Carbone (director of project management and construction); Lawrence Regan (planner); David Spalding (senior mechanical engineer); Danielle Gunther-Gawlak (project manager)
Design Architect Hopkins Architects, London—Sir Michael Hopkins (chairman); Michael Taylor (director); Sophy Twohig (project director); Henry Kong, Thomas Corrie, Tom Jenkins, Nate Moore, Edmund Fowles, Andrew Stanforth, Kyle Konis, Rose Evans, Sascha Novograd, Laura Wilsden (project team)
Executive Architect Centerbrook Architects and Planners, Centerbrook, Conn.—Mark Simon (partner); James A. Coan (project manager); Theodore C. Tolis
Structural Engineers, Mechanical, Electrical, Plumbing, Fire Protection Arup
Sustainable Design Atelier Ten
Landscape Architect Olin Studio
Civil Engineering and Stormwater Management Nitsch Engineering
Geothermal Engineers Haley and Aldrich
Construction Manager Turner Construction Co.
Excavation and Sitework Ralph Camputaro & Son Excavating
Landscaping Valley Crest Landscape Development
Size 58,000 square feet
Cost $33.5 million


Structure

Structural steel with up to 95 percent recycled content
Capco Steel
capcosteelco.com

Exterior Cladding

Sandstone masonry
The Briar Hill Stone Co.
briarhillstone.com

Precast concrete
Rex Precast Systems
rexprecast.com

Structural red oak glulam beams
Goodlam, a division of Goodfellow
goodfellowinc.com

Douglas fir arch and louvers
Goodlam, a division of Goodfellow
goodfellowinc.com

Windows and Glazing

Custom metal and glass curtain wall
Kawneer North America
kawneer.com

Custom windows
Marvin Windows and Doors
marvin.com

Custom skylight system
Wasco Skylight Products
wascoskylights.com

Doors

Custom doors
Builders’ Hardware
builders-hardware.net

Roofing

Sloped metal roofing
Follansbee Roofing
follansbeeroofing.com

Interior finishes

Cabinetwork and custom woodwork
Legere Woodworking
legeregroup.com

100 percent FSC-certified wall paneling
Legere Woodworking
legeregroup.com

Custom partitions
Partitions Inc.
partitionsincct.com

ElectroShade system for motorized shades
MechoShade Systems
mechoshade.com

Ceilings

Custom ceiling panels
Rulon Co.
rulonco.com

Flooring

Menagerie modular carpet tiles
InterfaceFLOR
interfaceflor.com

Furnishings

Think task chair
Steelcase
steelcase.com

Leap task chair
Steelcase
steelcase.com

B2 lounge chairs
Bernhardt Design
bernhardtdesign.com

B1 sofa
Bernhardt Design
bernhardtdesign.com

Luca chairs
Kusch + Co.
kusch.com

Custom tables
Fairhaven Furniture
fairhaven-furniture.com

Monumental entrance benches
Fairhaven Furniture
fairhaven-furniture.com

Lighting

P5 wall-mount wall washing fixture
Winona Lighting
winonalighting.com

FCSLR 803 exterior die-cast recessed step light
FC Lighting
fclighting.com

GR4B-132T8 interior downlight
Gammalux Systems
gammalux.com

FRR-07030 fixture
The Kirlin Co.
kirlinlighting.com

FRR-07031 fixture
The Kirlin Co.
kirlinlighting.com

One Line task lighting
Artemide
artemide.us

Design DSK-40 exterior fixture
Quality Lighting, a Philips Group brand
qlty.com

Lumark small Vaportight exterior accent fixture
Cooper Lighting
cooperlighting.com

FCSL 505 exterior die-cast step light
FC Lighting
fclighting.com

nLight control system
Sensor Switch
sensorswitch.com

Photovoltaics

Model 225 solar photovoltaic panel
SunPower
us.sunpowercorp.com

Plumbing

LaZer2, bespoke solar thermal domestic hot water array
Solar UK
solaruk.com

Bespoke reclaimed water tank
Fiber Technology Corp.
fiberteccorp.com

Solar-powered faucets, fixtures, toilet flush valves
Sloan Valve Co.
sloanvalve.com

Waterless no-flush urinals
Waterless Co.
waterless.com

Building Management System

Customized building management software system
Automated Logic Corp.
automatedlogic.com

Special Equipment

Adsolair 561901 air-handling unit with double-pass heat recovery and indirect evaporative cooling
Menerga
menerga.co.uk

WW 420, water-to-water reverse cycle heat pump
FHP Manufacturing
fhp-mfg.com