Incorporating Passive House Design Standards

CAHED, the Colorado Association of Healthcare Engineers and Directors, hosted its annual (Virtual) Speed Networking event on November 12. Speakers from Craig Hospital, Denver Health, UCHealth, Banner Health, NV5, SCL Health, and Children’s Hospital of Colorado divided among breakout groups via Zoom to educate professionals involved in building and maintaining healthcare facilities how they are coping in these strange times and what trends are evolving today. Following are takeaways from owners and facilities managers and how architects can adapt during this rapidly changing time in hospital design.
Healthcare leaders stressed that today’s “new normal” is likely temporary, and that COVID-19 isn’t necessarily going to change how they design and construct facilities in the future. They emphasized the need to not overreact, but to look at each instance calmly and objectively. Most are, however, delaying larger projects in favor of making smaller repairs, while still considering updating future policies and operations. Tasks are reprioritized daily. Many facilities have also reduced non-emergent care due to the pandemic, and projects that affect patient areas have mostly been put on hold. These days, whole portions of a hospital may suddenly become overflow for new COVID patients, sneeze guards are installed for every interaction, workstations are staggered, security cameras and personnel are added, and hotel stations are scheduled instead of serving practitioners on a first-come, first-served basis. Healthcare owners admit it is a struggle to comprehend what is needed currently—they work hard to properly prioritize regular projects compared to COVID needs, which change on a daily basis.
One of the largest challenges is modifying HVAC equipment to accommodate HEPA filtration and ensure COVID-negative spaces. To change one air handling unit into a HEPA unit, some owners have shut down entire hospital wings—but shutting down so much space just to make modifications is a problem as they struggle to find enough beds. Flexibility in the future will be key, from mechanical systems to the creation of universal rooms. Mechanical systems that were cheaper to build may be harder to balance for COVID-negative rooms, especially if large zones are handled by one VFD unit, making it hard to shut down capacity to do maintenance. Hospitals are simply too busy and don’t want to turn an entire wing into a bio-containment ward. What will be necessary to handle future diseases?
Maintenance is also difficult. What is contaminated and what is not? How can they balance the need to protect both the people in bed and those performing maintenance? What do you have to do or wear to change out a filter? Are they getting the right number of air changes per hour? How do you cohort an ICU room to provide for two COVID patients while keeping safety paramount? Best practices are ever-changing, and restrictions vary by county—and by the day.
Breakout areas have been created where personnel can remove masks and eat lunch socially distanced, but in general, no more than five to 10 may be in a room, even with masks. Departments need to find different ways to work together. Telemedicine has not made huge inroads into care and accounts just 10 percent for consultations. While many providers and patients do not gravitate toward telemedicine, hospitals don’t want caregivers out in the wider community. Still, therapy can occur in someone’s home, and hospitals are beginning to provide more of these services to accommodate patients outside of their facilities.
There is little mass testing for COVID unless there is an outbreak, and many healthcare facilities use temperature screening in an attempt to avoid the spread of the virus. Often, nurse practitioners screen visitors, vendors, patients, and contractors alike, sometimes relying on visual control to determine if there might be a problem as colder outside temperatures obscure results, sometimes requiring people to wait 10 minutes until a true temperature can register. There are a variety of procedures, some more restrictive than others. Some only require visitors to self-report symptoms. Others have banned staff from traveling. All find it difficult to get a clear picture of emerging COVID infections.
Some facilities struggle with their own unique issues related to COVID. Denver Health has typically been the hospital that cares for the unhoused population, and they formerly would welcome everyone through their doors. Now, that is not possible. They have limited hours for visitors and can’t perform take-ins how they once did—allowing the general public to wander in, use bathrooms, and hang around the cafeteria. Denver Health has since upgraded the presence of security to ensure that no one is congregating around the premises without a direct need and have closed bathrooms for public use. Instead, they have installed portable restrooms outdoors to help reduce contact with those infected.
Hospital supply chains are also in flux. It is a daily challenge to manage usage numbers and supply. Healthcare facilities have seen some increase in the domestic supply of important items, and most hope to end single-source procurement by diversifying their supply chains. They have turned away from large supplier overseas. Despite more domestic producers coming online, they still see companies move their factories across the border—an air filter company one owner depended on for years moved to Mexico.
Designers have been instrumental in helping owners imagine how to upgrade their facilities—for example, laying out floor plans to reveal how many beds can fit into a space. Designers, contractors, and vendors have brought new ideas to owners from other successful projects. Healthcare owners are eager to learn what has worked at other hospitals. With declining budgets and the day-to-day stress of reacting to COVID, they also better appreciate transparency and strong communication with their contractors. At the CAHED event, owners stressed that they strive to understand that surprises occur, and that they need designers and builders to be open and honest with them about cost changes as soon as possible.
Winter is coming, and like the north winds, the pandemic continues its chill on important sectors of our economy. We all hoped the COVID-19 curve would have flattened by now, but without extraordinary measures to keep establishments open and safe, Colorado’s restaurant and tourism industries risk being flattened instead. To help, Governor Jared Polis and the Colorado Restaurant Association teamed with AIA Colorado and several other AEC partners for the Winter Outdoor Design Workshop to develop outdoor restaurant design concepts, keeping Coloradans safe from the elements—and the virus—while dining in the dead of winter.
Early on in the pandemic, my colleagues and I reached out to our restaurant clients to find out how we could help. Costs aside, they felt permitting would be their biggest hurdle. We are glad to see state and city officials expressing interest in helping ease the path. “The restaurant industry is critical to the economic health of the State of Colorado, and it’s vital to the well-being of our local communities,” said Governor Polis in announcing the Colorado Winter Outdoor Grant program, an emergency assistance fund for Colorado restaurants experiencing financial hardship.
The restaurant industry operates on thin margins even in flush times, so the stay-at-home orders reducing indoor seating to just 25 to 50 percent capacity triggered a quick culling of revenues. Particularly hard hit were locations with little overflow space. Carryout sales—for business models that could take advantage of this market—got a boost when the state began allowing to-go alcohol, starting March 20. By May, restaurants began adding seating areas in public sidewalks and closed streets, as Governor Polis waived many state regulations and urged cities to do the same. Dave Query, founder of the Big Red F Restaurant Group, which operates Jax Fish House, Lola Costal Mexican and other popular concepts, says he’s been able to add extra outdoor seating to about half its restaurants. “Reducing indoor capacity to 50 or 25 percent means we need every outdoor seat we can find,” he said.
Ely Merheb AIA, founder of Boulder-based Verso and charrette participant, found “a silver lining witnessing streets become more people- and business-friendly.” Other groups also recognize the benefit of expanded pedestrian areas, especially onto side streets and parking lanes. Said Rob Toftness of the Denver Bicycle Lobby, who would like to see Denver’s temporary street closures made permanent, “Anytime we use public right-of way for something other than storing a private vehicle, it’s a win for everyone.”
As architects and urban planners, we’re taught early in our educations that a lively pedestrian presence serves to activate downtown streets and boost business. And to keep the party going through winter, we need to keep the customers warm. Cue the Winter Outdoor Design Workshop.
The idea sprung from Colorado Restaurant Association CEO and President Sonia Riggs. She reached out to AIA Colorado, where she formerly served as CEO. “Both organizations started digging into what that might look like,” said Nikolaus Remus, AIA, Advocacy Engagement Director at AIA Colorado. “After our first call, it was obvious we should bring ACEC Colorado on board since viable solutions were likely going to have engineering considerations.” Ultimately, the partnership included AIA Colorado, the State of Colorado, the Colorado Restaurant Association, Colorado Restaurant Foundation, American Council of Engineering Companies of Colorado, and the Associated General Contractors of Colorado for a daylong charrette to develop design concepts for outdoor dining. “I think there was a real buzz, an energy during this event to try to create and design amazing environments for our local restaurateurs,” said Scott Prisco, AIA, Denver’s Chief Building Official. “The selection of the team members was very relevant, as well. There were so many creative thinkers with differing perspective to achieve solutions to problems.”
After learning about the outdoor dining charrette while listening to a news conference from Governor Polis, “I reached out to AIA immediately, because I’ve been looking for ways to bring my skills to the table to help people,” said AIA Colorado member Jenny Edwards, of Ricca Design Studios. She along with dozens of other architects, engineers, restaurateurs, contractors, and public health and safety officials teamed via a videoconference to develop easy-to-implement concepts to encourage outdoor winter dining. The inclusion of fire and building officials was intentional, both for up-front input and to publicize an effort to promote faster emergency permitting.
Rob Duran, regional manager for the Blue Agave Grill concepts, joined the charrette after seeing that up to 60 percent of their revenue this year was being generated outdoors. “As data continues to show, outdoor dining is safest, and the diner’s willingness to sit outside through the elements is proving to be an obstacle that restaurants want to tackle.”
After an opening session with introductory remarks by the Governor, the nine teams broke into groups to each address a specific condition, from urban parking lots to mountain resort shopfronts to rooftop patios. Each team presented their rough concepts in a closing session at day’s end, then continued to meet throughout the following week to further develop their ideas. Major themes emerged: open modules with flexible seating vs. fully enclosed four-tops; open airflow to disperse airborne contagions while blocking the wind and keeping heat inside; efficient, yet safe heating under roofing; utility upgrades; heated benches and accessories; attracting diners on both sunny bluebird days and snow-dusted evenings; affordable and scalable modules that would allow customization to site conditions; snow loads; Brrrreckenridge. “Working with a group of amazing volunteers, we determined we could help temper winter’s chill with designs which created an experience that would draw guests despite the colder temperatures.” said Jeff Metheny, AIA, Principal at Studio Atlantis.
The resulting concepts landed in two camps familiar to every backpacker and trekker: tents and huts. Each team addressed these often-contradictory needs in unique ways, giving restaurant owners options that they can adapt to their specific locations. “We wanted to design with some flexibility, having both semi-permanent fixtures like posts and non-permanent units like panels,” said Edwards. “We considered the idea that this could be either disassembled and moved or become a permanent fixture for the park moving forward.” Each team was tasked with a different siting, and her Crinkle Commons concept considered the case of a nearby/adjacent park.
Added Jeff Metheny, whose team addressed urban streets and looked to Colorado’s own history as inspiration, “Using shapes derived from Conestoga wagons, teepees and A-frame shanties, each restaurant can create an upsized experience and much needed seating, all while maintaining safe distances from other diners. We were intentional in designing these structures to be easily and quickly fabricated and installed with the ability to be moved if needed.”
No matter the structure of the shelter, heating remains the key concern. “The primary obstacles for providing heat include available electric service, as well as code issues surrounding propane and gas units,” said Prisco. In response, the teams offered flexible, layered solutions for heating. For example, where gas capacity is available, remote and ducted portable construction heaters could provide the efficiency of gas at a code-compliant distance. With sufficient electric service, radiant electric heaters could be used safely under a roof. Heated walls, benches, or flooring could be added via off-the-shelf products customized to the specific site and structure. And personal heating accessories, from phase-change materials to good old-fashioned blankets provide the final layer. “Our Comfort Wall proposal focuses on maximizing comfort from a seated position, by creating a modular, low-wall system that blocks wind and concentrates heat from ground or under table sources, closest to seated customers,” said Merheb.
One takeaway? Cultural shift will be as important as a built intervention. As no outdoor space will be as cozy as last winter’s crowded tavern, we’ll need to coach our customers to expect a Colorado adventure. Add more hot-toddy cocktails to the menu. Normalize rugged après-ski looks. And naturally, promote a made-for-Colorado slogan: Bring Your Own Blanket.
History seems to be repeating itself, and we cannot wait any longer to make architecture influence equitable change around us. Day three of the AIA Colorado Just Architecture 2020 Practice + Design Conference highlighted the constant effort in creating a more equitable practice, showcased by the AIA Colorado Equity, Diversity and Inclusiveness Committee. The committee itself realized that we needed an action to make sure there are more entryways into the field of architecture and were determined to increase awareness and access to architectural education. This continuous effort was highlighted nationally through the presentations of, “Just Speak Up,” by Carole Wedge and the importance of women leading the future of the profession. Following her presentation was, Milton S. F. Curry, who voiced his vision for the future of the design field through, “Just Constructions” presentation showcasing the power in outsourcing architectural education to other underserved communities. Day three of the keynotes closed with a powerful keynote, Pascale Sablan, who explained the various mediums in which the current and future generations of BIPOC designers have empowered themselves in order to shape the future of “Just Architecture.”
Over the noon hour, students joined members of the Equity, Diversity and Inclusiveness Committee for a virtual “Ask an Architect” event, where architects with diverse backgrounds answered questions on architecture as a profession and higher education. The afternoon featured three lively breakout discussions with the panelists, encouraging us all to become more self-aware and step in in our firms to begin to create change. A panel discussion with all presenters left attendees with powerful takeaways, and the event culminated with a virtual livestream of the “Women in Architecture” projection, which takes place in downtown Denver all through October.
Once again, the Practice + Design Conference left us informed, connected, and above all, inspired. Check out some of the key takeaway moments below, and we’ll see you next year.
Architects have great power, and with great power comes the great responsibility of preserving our environment. The greatest challenges not only face our current profession, but also the design field as a whole. These were just a few of the takeaways from day two of the 2020 Practice + Design Conference focusing on environmental stewardship.
As architects, we are clear leaders in climate action and must direct our focus on sustainability. Staying resilient is what creates environmental stewardship, and with more focus on education and outreach in supporting our communities, we can achieve a more sustainable future. The conference today showcased innovative and vibrant designs that highlighted today’s theme, “Just Sustainability.” From the benchmarking requirements for museums by Joyce Lee to understanding the sustainable features of timber by Thomas Knittel and the maximized use of sunlight by Lake|Flato Architects, all entailed the influential factors of maintaining, “Just Sustainability.”
Afternoons were filled with member networking—of the digital variety. Each speaker held intimate breakout discussions and all reconvened for a thoughtful panel discussion. And from Denver to Durango, connections were made over happy hours with each of the sections with playful activities and reunions with old friends.
Below are key takeaways and along with a special illustration documented by a live illustrator Ellen O’Neill.
The 2020 AIA Colorado Practice + Design Conference debuted Wednesday, October 14, and focused on the theme of “Just Design.” Five keynote speakers in the morning sessions showcased the scale of architecture that is currently taking place from the capital of Peru to the heart of Chicago’s south side to the districts of Los Angeles.
The designs of Lima, Peru, from Sandra Barclay, showcased “Just Intimacy” in relation to how design can downscale the vastness of our environment all by taking inspiration from local culture. The eight designs highlighted by Neil Denari incorporated “Just Urbanism,” and how the busy urban grid of Los Angeles can help inform design by designing with the urban grid rather than against it. “Just Design,” wrapped with the presentations of Tod Williams and Billie Tsien, highlighting the importance of creating a vibrant public space through storytelling, story making and how it can all adjust to the world. Day one was filled with many amazing stories and interpretations of design and how the current members of AIA Colorado continue to help shape the world around us.
Following morning keynote presentations, afternoons were filled with member engagement, featuring breakouts with each speaker, then a panel discussion with all, which resulted in high-level discussions on design alongside the humility of casual conversing with home as the backdrop for these world-renowned designers. Below are key takeaways and themes that emerged from the day’s events, which were documented by a live illustrator Ellen O’Neill (above).
Ingredients of architecture
For the territory climate: Lima, Peru
Pre-Columbian legacy and landscape
Puruchuco, Lima
Casa Vedoble
Paracas Museum
The Hispanic Legacy and the City
Limana Restaurante
The Lessons from the Masters UDEP Academic Facilities
Kyoto City Grid
“The Continuous Monument”
Aldo Rossi
Silver Lake 1
Half Court Housing
Beveled Office Building
9000 Wilshire Office Building
Santa Monica wellness Center
La Brea Hotel
The Barnes Foundation
Obama Presidential Center
Sustainability is a watchword in the architectural community, one that has broader implications than just energy savings and lowering carbon emissions. According to the Framework for Design Excellence, sustainable design is more than just lowering energy use and includes considering the “triple bottom line” of social, economic, and environmental value. Sustainable buildings should contribute to a diverse, accessible, walkable, and human-scaled community; support biodiversity and connect with regional habitat restoration; conserve water and material resources; be economical, and balance first costs with long-term value; support occupants’ and the surrounding community’s physical, mental and emotional health; be adaptable over time and address future risks and vulnerabilities from social, economic and environmental change; continuously improve upon discoveries made in previous projects; and be a beautiful addition to the built world that future generations will want to keep around.
As a profession with so much responsibility for shaping the built environment, architects have always had an interest in sustainability and all that the word implies. But in the day-to-day rush to get projects in and out the door, it is difficult to incorporate all of the diverse interests, information overload, conflicting data, and demands for sustainability that eager designers encounter. What do we concentrate on first? And how do we incorporate sustainable goals in the face of occasionally indifferent owners and tight budgets?
AIA Colorado supports many committees working on subjects of importance to the architectural community, including the Sustainability Advancement Working Group. Formerly the Resiliency Knowledge Community—with a concentration on how to ensure the built environment can respond to fires, floods, climate change, and other disruptions—they are now concentrating on promoting the 2030 Commitment and assisting design firms with adapting their practices to meet it. The 2030 Commitment envisions building projects achieving Net Zero energy use by 2030. Being carbon neutral means that carbon produced through a building’s operations will be offset by the project generating as much renewable energy as the building consumes.
In 2018 alone, firms participating in the 2030 Commitment saved 17.7 million metric tons of CO2, which is equivalent to the carbon emissions that would be avoided by taking all the cars in Georgia off the road for an entire year. Signing onto the AIA 2030 Commitment involves a commitment to gather information and evaluate the impact design decisions have on your project’s energy performance, allowing you to track improvements in the energy performance of your firm’s projects over time. Design firms joining the 2030 Commitment will gain access to confidential data from leading AIA firms’ projects worldwide. They will also be provided with the support, education, tools, and analysis that can help them improve their expertise, develop new sustainable approaches to sell to clients, validate their design approach, compare their data to other firms in the region, and help combat climate change while improving the bottom line. See this link for more information:
Firms joining the 2030 Commitment must submit a Sustainability Action Plan within 6 months. The SAP guides firms in creating their approach to sustainable design and provides an opportunity to strategically and methodically translate your sustainability goals into a comprehensive approach for transforming your practices and portfolio. The Sustainability Advancement Working Group provides additional educational resources for architects who want to improve their abilities to create sustainable architecture. The committee has already waded through the massive amounts of information and resources available to provide architects with a better understanding of how they can improve their projects for their clients and communities.
Members of the Sustainability Group emphasize that sustainable architecture doesn’t have to cost more. For example, optimizing the massing and orientation of a building can have a huge impact on energy costs without requiring additional funds. Energy modeling is a lot more sophisticated and user-friendly these days—previously, practitioners had to perform the math calculations for their solutions themselves, and now the computer programs can provide these automatically. Many people use these programs to inform their design as it progresses, and daylighting analysis has also improved, giving designers and their engineers vital information before floor plans and elevations are fixed. LEED standards and building codes have also greatly improved the energy performance and indoor health of buildings. Public clients often require LEED certification, and the industry has moved further into green architecture to accommodate these requests, offering marketing opportunities for firms interested in sustainability. Designers today are much more aware of the need to control waste, lower energy use, and increase material conservation and indoor air quality, while new non-VOC building products that weren’t available even 5 years ago are ubiquitous today.
While the 2030 Commitment concentrates on reducing operational carbon, a focus on embodied carbon is trending among sustainable practitioners. Some materials naturally contain more embodied carbon than others; for example, concrete structures require more energy to produce than a wood structure. Where material comes from is increasingly important. As the 2030 Commitment begins to reduce operational carbon, interested designers predict that a continued focus on sustainability will gradually shift to reducing embodied carbon as well.
My focus professionally has been on using Lean methods to integrate cross-functional teams in the design and construction of buildings. Lean dovetails perfectly with sustainable building—both practices acknowledge that having integrated teams early in the design process is key. It has often been stated that in the first 10% of design, almost 70% of all costs and environmental impacts have already been determined. Primary materials, the structural system, fenestration and massing and orientation are often determined at this point before engineers even start their work. Having a set floor plan that engineers must then “fit” mechanical, electrical, and plumbing systems into creates a piecemeal approach to design, ensuring that the project will ultimately perform as less than the sum of its parts. Contractors brought in late in the design process—even by the Design Development phase under a CMGC contract—have very little room to make recommendations that will greatly improve the project, and on most traditional projects do not provide specific trade knowledge from those “Last Planners” who will ultimately install these systems. Bringing engineers and even major subcontractors on early gives architects the knowledge to create the optimal project for their clients using a whole systems approach.
Intimate knowledge of how a building will be built is key to providing true sustainability that can actually be measured. A design/build firm specializing in bringing Passive House principles to their projects described one commission from a prominent learning institution that required them to design and build the mirror image of an existing college dorm building across a quad. Using Lean and sustainable principles, they managed to create a mirror image of the building—only the new structure met Passive House standards while costing $5 per square foot less than the building built 5 years before. Passive House concentrates on designing and building a façade that controls the passage of air and moisture. The HVAC system is sized to accommodate the façade. Hence, the new dorm only required a 20-ton mechanical system, which was much easier and more economical to build and operate than the previous dorm’s 70-ton system.
Holistic thinking is central to sustainable architecture. Yet in current practice, many engineers design for a “type” of building (not the actual building being designed), using rules of thumb that grossly over design the system, especially the mechanical and electrical systems. For example, when designing a school, interior designers who choose paint colors with a high light reflectance value can reduce the number of light fixtures required to light the room, which also reduces the need for cooling. Expensive, efficient windows can provide occupants with a comfortable environment while also eliminating the need for a perimeter heating system. Unfortunately, sustainable projects still usually calculate payback on line-items and not on systems as a whole, leading to poorly considered decisions that eliminate those “expensive” windows without calculating the additional cost for the mechanical system.
Hence, if the mechanical engineer is designing for a building “type,” he/she will design for the worst-case scenario without collaborating with others: The month is July, the building is at full capacity, the weather is the hottest on record, all the lights are on at noon, and his mechanical system can still cool the building—then they add a safety factor! By bringing in everyone early to discuss the actual building being designed, using multi-disciplinary teams that include MEP engineers and contractors and the architect working together, you can create a whole that is better and cheaper than the sum of its parts. The team should make decisions together, then design to those decisions. Contractors keep a check on costs, and ensure that constructability is an input to the design and not an outcome inevitably leading to weeks of scope cuts and “value engineering.”
One obstacle to adopting this process is that a typical architect’s traditional fee structure—with design fees peaking in the Construction Documentation phase—does not easily allow project teams to bring important people in early. Owner expectations are an issue; designers must show that there is great benefit in spending more time and money early in the design process when the most value can be created cheaply. Trade partners early in the process can work together with designers to deliver the building earlier than is possible when contractors are brought in too late. The team can compress submittal and RFI review times, or perhaps even eliminate submittals altogether with the cooperation of trades and owner groups in the design phase. All while delivering a sustainable building that costs less to operate and is better integrated into its environment.
One book that combines a Lean approach to a new vision of sustainability (where building designers aren’t just satisfied that their buildings have a “lesser” impact on their environment, but actually enhance the environment they stand within), is “The Integrative Design Guide for Green Building: Redefining the Practice of Sustainability.” If an architect would like to jumpstart a sustainable culture in their firm, read the book, sign up for the 2030 Commitment, and then contact the Sustainability Advancement Working Group for more educational opportunities and assistance. With a little commitment, we can all do our part to decrease the impact the built environment has on climate change and pollution!