Sustainable Strategies for Expansive Facilities

Fentress’s portfolio is valued at over $43 billion and serves more than 650 million people annually.

Strategies of waste reduction, recycled content maximization and conservation are consistent regardless of the scale of the project. However, there are a few consistent strategies to consider when designing expansive facilities:

  • Harnessing daylight to minimize energy use and control heat gain. 
  • Integrating with the community and multimodal transportation networks.
  • Creating spaces and systems that will welcome future adaptations.   

The following projects illustrate these strategies:

Passenger Terminal Complex at Denver International Airport

Fentress’ entree into expansive facilities came with the commission to design the 2,250,000-square-foot Passenger Terminal Complex at Denver International Airport.  Fentress took over a project suffering from uninspired design, exorbitant cost and schedule overruns. The solution to reverse these incontestabilities was the creation of a light-filled volume to echo Colorado’s dramatic mountain scenery. Despite skepticism on the ability of a tensile structure—then a nascent building technology—to achieve the necessary spans and withstand area snow volume, Fentress countered precedent and flipped the airport’s massive infrastructure from the roof to underground. The shift allowed up to 150-foot light-filled roof peaks to come to life while conserving resources. Hundreds of tons of structural steel and building materials were eliminated. The design also powerfully harnessed natural light. The Denver airport dramatically changed contemporary ideas on airport design, introducing expressive form to welcome travelers to a place and its culture.

Colorado Convention Center Phase II

In 2010, the Colorado Convention Center (CCC) announced its certification through LEED–EB, making it—at 2,300,980 gross square feet—the largest convention center certified under LEED-EB to date and among the largest LEED-certified convention facilities in the US.  As Denver residents, Fentress Architects recognized the Center’s potential to reshape the city.  So, the focus was on establishing and reinforcing its connections with the urban surroundings. The integration of a light rail station within the building has advanced economic growth and revitalization initiatives for the once-barren 14th Street. Fentress’ work catalyzed a surge of infill development that continues to bring new life, investment and activity to Denver.

Tom Bradley International Terminal at LAX

At 1.4-million square feet, Tom Bradley International Terminal at LAX became the world’s largest LEED Gold certified airport when it opened in 2013.  Adding to the complexity of this immense facility is the fact that renovation and construction occurred while the terminal remained fully operational. Fentress’ state-of-the-art, people-centered design allows abundant natural light from clerestories and broad windows.  Environmentally-friendly concepts were integrated at every stage and every level of the project.

Operational and performance goals of improved energy performance, reduced water consumption, waste, and emissions were met, in part, through integrated strategies that aligned with the larger aesthetic and experiential objectives. For example, Fentress conducted extensive sun-shading studies during the design of the roof structure to minimize heat gain and maximize daylighting.

Additional strategies include a high-performance thermal envelope, drought-tolerant landscaping, the provision of a purple pipe infrastructure in anticipation of future availability of municipal-supplied non-potable water, programmed space for recycling, an early procurement program for materials that contain recycled content, specification of non- or low-emitting materials, and the incorporation of free shuttle bus service to provide better connectivity to and from the airport, the city and the region.

Ralph L. Carr Colorado Judicial Center

LEED Gold-certified Ralph L. Carr Colorado Judicial Center in Denver remains one of the most sustainable courthouse complexes in the United States. It hosts the Colorado Supreme Court Law Library, a visitor’s Learning Center, and a 4,000-square-foot green roof.  The granite-clad Neoclassical building respects the archetypal presence of its neighbors. It steps back to acknowledge a center of learning: the Denver Central Library. The design also focused on completing the flow of a pedestrian walkway between the Library and State Capitol.  The result is in a direct, physical link to the Center’s functions for users and visitors as they move across the campus. The Carr Judicial Center makes substantial use of durable and recycled materials. It remains 30-percent more energy efficient than standards demanded.  In addition to its green roof, sustainable features include a photosensitive daylight harvesting illumination system, a state-of-the-art and highly efficient mechanical system, and locally sourced materials such as marble from Marble, Colorado.

COVID-19 + Airport Design: Enhancing Passenger Safety + Confidence


COVID-19 is forcing designers to reimagine the way the built environment is experienced. In particular, public transportation venues have been severely affected by the pandemic and many of their operators are searching for means to ensure passenger safety and build long-term user confidence.

In April 2020, we saw air travel in the U.S. reach an all-time low as passenger traffic dropped by more than 95%.  As of June 2020, with travel bans and restrictions loosened and lifted, passenger traffic has begun to grow—albeit slowly. 

Scenarios for global recovery reflect the latest predictions of significant economic decline in 2020 and partial recovery in 2021. Graph and data: InterVISTAS.

Fentress Architects’ Aviation Studio formed a COVID-19 Committee at the outset of the pandemic. The objective of the Committee has been to provide airport operators and airlines with well-researched design strategies for the creation of healthy, safe and comfortable environments that maintain high levels of efficiency and are fiscally feasible. The Committee’s recommendations fall into two actionable phases: NOW and NEXT. A third phase – BEYOND – serves comprehensive planning efforts.  Recommendations include touchless technologies, integrated safety measures, wayfinding solutions, queue management and more. This multi-phased approach will help mitigate the spread of today’s virus as well as future, yet unknown infectious diseases.


It’s crucial to respond quickly, efficiently and wisely in times of crisis. Entry screening, touchpoint reduction, wayfinding, queue management and new holdroom seating configurations are a few ways that simple modifications and additions can be employed to yield immediate and effective results.

Entry Screening

Health and temperature screening—via Infrared Thermal Detection Systems (ITDS) for Mass Screeningat entrances and security queues will help identify infectious persons. While research has shown temperature screening may not capture all cases of COVID-19 (it is possible for carriers of this disease to present without elevated temperature), it will detect a significant amount. And in doing so, this safety measure will instill confidence among travelers and staff in the facility’s procedures.  

Reducing Touchpoints

Touchpoints, also known as occasions for human interaction, consistently emerge throughout the airport experience: from check-in to security, concessions and boarding. Given 80 percent of all infectious diseases can be transmitted through touch (Centers for Disease Control and Prevention), it is crucial to limit surface contact. Numerous technologies—facial recognition, artificial intelligence and biometric scanners—have already been employed to improve the passenger experience and reduce touchpoints.

Touchless kiosks can limit human-to-surface contact. Photo: AirAsia

Over the last five years, touchless, gesture-based kiosks have been gaining momentum at museums to enhance the check-in process and diminish wait times. Airports can leverage this same technology to transform self-serve kiosks from touch to touchless, which significantly reduces the risk of viral or bacterial transmission.

Wayfinding + Queue Management

Logical and logistical wayfinding strategies are essential to ensuring positive passenger experiences. Designers routinely utilize subtle, often unseen, wayfinding techniques to alleviate the stress of travel. However, the opposite is needed in a pandemic when travelers yearn for “can’t miss it” strategies that reduce uncertainty and anxiety.

Arconas’ ‘Leave Space’ Floor Stickers placed six feet apart in queuing areas can help facilitate social distancing. Photo: Arconas

Several temporary solutions, such as Arconas’ ‘Leave Space’ Floor Stickers placed six feet apart in queuing areas, encourage physical distancing while also guiding passengers. We’ve seen these ad-hoc methods used in almost every building type – from coffee shops and grocery stores to civic buildings and even airports. However, a more effective solution for airports requires a strong focus on queue management.

Holdroom Seating Configuration

The pre-COVID-19 “Serpentine” queue layout requires people to encounter one another.

In the traditional “Serpentine” security queue, passengers face one another as they navigate their way to the checkpoint, making it nearly impossible to avoid face-to-face contact.

A “Ski Lift” queue layout ensures all passengers remain front facing.

Alternatives like the “Ski Lift” queue ensure all passengers remain front facing. Social distance stickers coupled with a “Ski Lift” queue would be highly effective in reducing the spread of germs.

Security Checkpoints

Now that we have discussed queue management, it’s time to integrate this measure into the bigger picture: improving the entire security checkpoint process.

Facilitating a front-facing flow in the queue, passenger temperature screening, mitigating contact with officers, and providing sanitizer or hand washing stations can help create a safer security process.

First and foremost, airports must ensure all building users –TSA officers, airport and airline staff, and passengers – are protected throughout the entire airport experience. Since pre-COVID-19 security checkpoints are prone to human-to-human contact, it’s essential to rethink the process with safe and health-driven improvements.

Here are some easily implemented methods to enhance comfort and safety at security checkpoints:

  • Enforce social distancing and front-facing flow in the queue
  • Passenger temperature screening prior to proceeding through the checkpoint
  • Protect TSA officers behind Plexiglass screens
  • Provide handwashing stations after high-traffic contact areas

Holdroom Configuration

Social distancing of passengers in the pre-COVID-19 holdroom is physically impossible due to cross traffic conflicts.

Pre-COVID-19 holdroom layouts provide little to no social distancing. Cross traffic obliterates social distancing requirements, resulting in only three feet of space between individuals as they walk down an aisle.

Fentress re-designed holdroom seating to enhance social distancing and comfort.

So, we’ve reimagined holdroom seating configurations to ensure passenger comfort without a reduction in capacity. By rotating the seating, airports can significantly increase usability of existing seating capacity.

Arconas’ Place® Chair Shield Accessory (adaptation for social distancing)

Additionally, we collaborated with designer Michael McCoy to create a shield add-on for Arconas’ Place® Chair, which adheres to social distance guidelines. 

The Pacific Marketplace in Seattle-Tacoma International Airport’s Central Terminal features flexible seating areas.

Additional seating solutions include the transformation of otherwise unused areas, like concession seating, into additional holdroom space. 


“Now” proposes strategies and solutions to be implemented within a matter of weeks and when passenger volumes are at their lowest. Meanwhile, “Next” includes strategies and solutions that need longer to fully implement and occur with increasing passenger volumes.  They expand on phase one in both size and scope: from touchpoint reduction to touchless; from spacing to orientation for both queuing and holdrooms. 

Touchless Experience

Simply put, it isn’t enough to reduce touchpoints; the airport experience must evolve to be touchless. Touchless environments not only expedite and enhance all aspects of travel, they also improve health.

The world’s first fully biometric terminal was created for Delta Airlines at Atlanta’s Hartsfield Jackson International Airport.  It integrates biometrics from curb to gate, which not only removed touchpoints, it also saved an average of nine minutes when boarding a wide body aircraft alone.  At the Fentress-designed South Terminal Complex for Orlando International Airport, biometric boarding gates will help reduce surface contact while creating a more efficient boarding process.

Airports may also choose to limit surface contact in elevators with solutions like MAD Elevator Inc.’s “Kick-to-Go,” which is comprised of foot-activated buttons, and “Touch-to-Go,” which provides easy-to-clean elevator touchscreens.

Breeze at LAX allows passengers to order food via an app for pick-up at a kiosk. Photo: Fly with Breeze

Expansion of low-touch concession opportunities will further enhance the passenger experience. Earlier this year, Los Angeles International Airport adopted this strategy to pilot an on-demand food service program in Terminal 2. The service incorporates a ‘ghost kitchen’, which allows passengers to pre-order for pickup while the food is prepared in an existing kitchen space within the terminal. This sustainable model is an efficient solution, avoiding the need for new construction and infrastructure.

Arconas’ Place® Chair Cluster

While the addition of dividers between seats in holdrooms is an important first step, furniture options such as Arconas’ Place® Chair Cluster and Radius Dividers maximize personal space for passengers while optimizing seat utilization. The incorporation of leaning rails throughout concourses can also help mitigate touchpoints and offer operators more easy-to-clean surfaces.

Expand Outdoors

The Fentress-designed Austin-Bergstrom International Airport features outdoor seating areas.

Working closely with designers, airports can expand seating to outdoor areas to accommodate higher passenger levels while allowing for social distancing. At the Austin-Bergstrom International Airport (above), Fentress’ design expanded the holdroom outdoors, establishing an efficient way to optimize the site’s unused space.

Outdoor holdroom seating offers benefits far beyond increased space. It also provides natural ventilation for passengers, promoting passenger well-being while maintaining a healthy and comfortable atmosphere.


While it’s easy for the industry to focus on short-term survival, airports and designers must take a responsive and resilient approach to adapt to a post-COVID-19 world. Ultimately, our goal as airport designers is to create physical environments that instill passenger and consumer confidence in the world’s aviation system for the long term. This forward-thinking approach requires a design strategy that far surpasses implementation of COVID-19 protocols; it requires designing flexibility and resiliency into structures that can easily acclimate to unforeseen conditions for the next 20 years and beyond.

Technology is the Future

Technology has been a catalyst for airport design innovations long before the current pandemic. But now, more than ever, it will be essential in creating flexible buildings while ensuring passengers stay informed and connected. Automation technology such as robotics will become more common to provide passengers with pertinent information, improving airport efficiency and service. Incheon International Airport adopted this technology early on, incorporating customer-facing robots to advise passengers throughout the airport journey.

AI (Artificial Intelligence) will help improve airport operations and facilitate safety measures. At Seattle-Tacoma International Airport, an airside artificial intelligence system will enhance aircraft taxing, gate allocation and turnaround. The airport also implemented visual sensors to monitor passenger line lengths to help improve efficiency while facilitating queue management.

Leveraging Digital Technology

Capitalizing on digital technology will also be paramount to the future of airport design. Our aviation experts have taken forward-thinking approach to the holdroom boarding experience by creating a concept for a new podium that supports social distancing with a built-in shield between passengers and airline staff. This visually informative LED screen also provides 360-degree coverage, empowering passengers to remain in their seats while staying updated with flight information.

Resilient Public Spaces

Resiliency is key when it comes to designing public spaces. Public areas in airports of the future will need to accommodate more space for separation between passengers while remaining flexible to respond to health issues that could arise.

Other passenger-facing areas such as ticket counters, security checkpoints and holdrooms will also need to be highly configurable to accommodate shifting passenger levels, safety protocols such as health scans and sporadic social distancing requirements.   

Driving Wellbeing + Sustainability

The airport of the future has an opportunity to be a catalyst for public health. This strategy goes beyond cleaning surfaces; it places the wellbeing of users and the environment at the heart of the design. Designers can leverage building systems while setting ambitious energy efficiency targets to improve health of both passengers and the environment. The goal is to redefine the airport as an agent for health and a driver for a sustainable future.

While we can’t predict the future, we can employ flexible design strategies to mitigate the impact of uncertainty.

Sustainability Action Plan

AIA 2030 Commitment

Working Toward 2030

The built environment—the places where humans live, work, and play—represents one of the largest sources of greenhouse gas emissions in America and around the world. Fentress Architects has seen this for years and has vowed to work toward a future of carbon neutral buildings by signing the AIA 2030 Commitment.

Sponsored by the American Institute of Architects, this pact calls on signatories to meet rigorous guidelines for climate action through energy efficient design and construction. Culminating in a goal of zero net emissions by 2030, it has already posted promising results. For example, in 2018 more than 200 member firms accounted for energy savings equivalent to 3.7 million passenger cars’ emission for a full year, or 20.8 million acres of carbon captured in forests. Last year, 16 firms saved more than 70 percent across their entire portfolio.

Continue reading “Sustainability Action Plan”