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Meeting the 2030 Challenge With integrated design - BetterBricks

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<strong>Meeting</strong> <strong>the</strong> <strong>2030</strong> <strong>Challenge</strong><br />

<strong>With</strong> Integrated Design<br />

By Jeff Cole, Konstrukt, Inc. for <strong>BetterBricks</strong><br />

In response to global climate change, key leaders of <strong>the</strong> building <strong>design</strong> industry have established a goal of “zero<br />

net energy” buildings by <strong>the</strong> year <strong>2030</strong>. In May 2007, representatives of <strong>the</strong> American Institute of Architects (AIA),<br />

<strong>the</strong> American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE), Architecture <strong>2030</strong>,<br />

<strong>the</strong> Illuminating Engineering Society of North America (IESNA), and <strong>the</strong> U.S. Green Building Council (USGBC),<br />

supported by representatives of <strong>the</strong> U.S. Department of Energy, finalized an agreement of understanding that <strong>the</strong>y<br />

hope will result in carbon-neutral buildings.<br />

The <strong>Challenge</strong><br />

This agreement provides a common basis and measure of progress as building <strong>design</strong> professionals create greater<br />

numbers of buildings that use substantially less energy, reduce greenhouse gas emissions, and create spaces that<br />

are healthy and comfortable. The agreement specifies energy performance targets, beginning with an immediate<br />

reduction of 50 percent in energy use for all new buildings. This target increases rapidly, with a 60 percent reduction<br />

proposed for 2010, adding an additional 10 percent reduction every five years, until carbon neutral buildings are <strong>the</strong><br />

norm by <strong>2030</strong>.<br />

How Do We get <strong>the</strong>re<br />

<strong>With</strong> <strong>the</strong> introduction of <strong>the</strong> <strong>Challenge</strong>, <strong>the</strong> <strong>design</strong> community is asking…How will <strong>the</strong>se targets be reached Is it<br />

possible Well, it’s clear that getting to <strong>the</strong>se targets will require significant changes in <strong>the</strong> way buildings are <strong>design</strong>ed<br />

and built. Rapid diffusion of innovation will be required. New technologies and building materials will make a<br />

contribution, but <strong>the</strong> fundamental innovations needed to immediately cut average energy use in half will have to come<br />

from <strong>design</strong>ers learning to rethink <strong>the</strong> way <strong>the</strong>y <strong>design</strong> buildings.<br />

Search for Synergies<br />

Many initiatives are being made to formalize an “<strong>integrated</strong> <strong>design</strong>” process. Among <strong>the</strong>se efforts, G.Z. Brown,<br />

FAIA, Director of <strong>the</strong> Energy Studies in Buildings Laboratory at Department of Architecture of <strong>the</strong> University of<br />

Oregon, collaborating with practitioners such as Kent Duffy, FAIA, SRG Partnership, and Michael Hatten, PE, SOLARC<br />

Architecture and Engineering, has been refining <strong>integrated</strong> <strong>design</strong> practices that deliver buildings with exceptional<br />

energy performance. Says Brown, “The heart of <strong>the</strong> <strong>integrated</strong> <strong>design</strong> process is <strong>the</strong> search for synergies among<br />

attributes of climate, use, <strong>design</strong>, and systems, that will<br />

result in increased performance, while reducing project<br />

first cost and operating expense.”<br />

“The heart of <strong>the</strong> <strong>integrated</strong> <strong>design</strong> process<br />

is <strong>the</strong> search for synergies among attributes<br />

of climate, use, <strong>design</strong>, and systems, that will<br />

result in increased performance, while reducing<br />

project first cost and operating expense.”<br />

Designers practice within a number of constraints:<br />

a client’s program and <strong>the</strong> needs of occupants;<br />

building codes and zoning requirements; site-specific<br />

limitations; <strong>the</strong> impact of climate; <strong>the</strong> need to integrate<br />

multiple building systems; and <strong>the</strong> performance capabilities of equipment, technologies and materials. A building’s<br />

energy performance is broadly determined by four general sets of criteria among <strong>the</strong>se constraints: climate, use,<br />

<strong>design</strong>, and systems. One of <strong>the</strong> approaches that Brown uses and <strong>BetterBricks</strong> is promoting to help <strong>design</strong>ers create<br />

syn<strong>the</strong>sis, is to begin seeing <strong>the</strong>se constraints as opportunities to generate significant energy savings.


Key Recommendations<br />

Below are a few key recommendations, organized by <strong>the</strong> four sets of criteria:<br />

• Climate. Analyze local site and climate resources for heating, cooling, and lighting: analyze climate effects and<br />

resources, <strong>the</strong> coincidence of climate and building use patterns, and how climate can complement building<br />

systems.<br />

• Use. Analyze owner and user needs and creatively consider schedules and comfort criteria when developing<br />

<strong>the</strong> program and establishing <strong>the</strong> construction budget. Most buildings are ei<strong>the</strong>r unoccupied or are partially<br />

occupied, most of <strong>the</strong> time. Buildings should be <strong>design</strong>ed as carefully for <strong>the</strong>se periods as <strong>the</strong>y are for peak<br />

periods. The potential benefits of flexible, ra<strong>the</strong>r than fixed, occupancy schedules should also be considered.<br />

Classify spaces by <strong>the</strong> degree of individual ownership and control of <strong>the</strong>rmal and visual conditions.<br />

• Loads. Understand <strong>the</strong> implications of building form, organization, and envelope and <strong>the</strong> selection of materials<br />

– mass, insulation and glazing, for example – upon loads. Use building <strong>design</strong> to create smaller loads (reducing<br />

system costs). This includes passive strategies such as daylighting and natural ventilation.<br />

• Systems. Design <strong>the</strong> building to improve efficiency and performance and to reduce <strong>the</strong> cost of multiple and<br />

redundant building systems: structural, mechanical, electrical, lighting, acoustic, and civil. Explore building<br />

and site <strong>design</strong> opportunities to reduce or eliminate HVAC system loads. Separate <strong>the</strong> ventilation system<br />

from heating and cooling systems.<br />

When loads are significantly reduced, <strong>the</strong> number of hours <strong>the</strong> HVAC and lighting systems are used becomes smaller.<br />

Make sure that HVAC and lighting system choices and sizing are based upon <strong>the</strong> actual schedule and <strong>the</strong> severity of<br />

actual loads ra<strong>the</strong>r than prescriptive <strong>design</strong> conditions. Select high efficiency equipment to meet <strong>the</strong> reduced loads.<br />

Rethinking Design<br />

Many architects describe conceptual <strong>design</strong>, schematic <strong>design</strong>, <strong>design</strong> development and <strong>the</strong> preparation of<br />

construction documents as a <strong>design</strong> process, when it might be more accurately described as a schedule for<br />

deliverables and budgeting. When discussing <strong>the</strong> practice of <strong>integrated</strong> <strong>design</strong>, Brown makes a distinction between<br />

those aspects of project management that remain closely tied to <strong>the</strong> project schedule and <strong>the</strong> aspects of <strong>integrated</strong><br />

<strong>design</strong> that can proceed more independently throughout <strong>the</strong> project phases.<br />

“Sometimes <strong>the</strong> past experience of a <strong>design</strong> team can<br />

become a barrier to new systems thinking. When a<br />

team is guided through those barriers by defining <strong>the</strong><br />

effect of load reducing <strong>design</strong> strategies using modeling<br />

techniques, a conceptual awakening can happen. The<br />

‘light bulb’ comes on as folks realize that, once heating,<br />

cooling, and electric loads are moved into a new range,<br />

systems possibilities are greatly expanded.”<br />

The discussion of who to involve early in<br />

<strong>the</strong> process, when and how often various<br />

project team members should meet,<br />

how to improve communication and<br />

interactions, and <strong>the</strong> organization and<br />

structure of charrettes and work sessions<br />

are certainly important. These elements<br />

of <strong>integrated</strong> <strong>design</strong> are discussed in more<br />

detail in <strong>the</strong> Tools and Resources Section –<br />

Integrated Design.<br />

<strong>Meeting</strong> <strong>the</strong> <strong>2030</strong> <strong>Challenge</strong> <strong>With</strong> Integrated Design<br />

2


While <strong>the</strong> search for syn<strong>the</strong>sis and new <strong>design</strong> solutions is less likely to<br />

happen when <strong>the</strong> members of a <strong>design</strong> team work in relative isolation,<br />

<strong>the</strong>y won’t necessarily be enhanced in project team meetings with broad<br />

agendas that must also meet <strong>the</strong> needs of non-<strong>design</strong>ers. Ensuring that<br />

activities such as goal setting, commissioning, and energy modeling are<br />

properly scheduled and receive <strong>the</strong> attention required by <strong>the</strong> team, will<br />

help to ensure a successful project and verify project performance, but<br />

significant breakthroughs in building energy performance will take place<br />

when <strong>the</strong> <strong>design</strong> process supports <strong>the</strong> search for syn<strong>the</strong>sis. Therefore it is<br />

recommended that <strong>the</strong>re ei<strong>the</strong>r be two sets of meetings, or two parts of each<br />

meeting: one for goal setting, process and management and ano<strong>the</strong>r for<br />

technical <strong>design</strong> solutions.<br />

There are critical points where <strong>the</strong> <strong>design</strong> process and <strong>the</strong> project schedule<br />

intersect, where proper coordination will provide distinct benefit. By<br />

scheduling certain tasks at particular times or in a given sequence, <strong>the</strong> project<br />

manager can facilitate a <strong>design</strong> that strives for increased performance. It’s<br />

also recommended that full team meetings be held at key points along <strong>the</strong><br />

project schedule to check on progress toward <strong>the</strong> goals.<br />

Michael Hatten, a mechanical engineer with SOLARC Architecture and Engineering, who has worked with Brown to<br />

advance <strong>the</strong> practice of <strong>integrated</strong> <strong>design</strong>, has observed <strong>the</strong> breakthroughs that can emerge from a project team’s<br />

exploration of new techniques.<br />

“Sometimes <strong>the</strong> past experience of a <strong>design</strong> team can become a barrier to new systems thinking. When a team is<br />

guided through those barriers by defining <strong>the</strong> effect of load reducing <strong>design</strong> strategies using modeling techniques, a<br />

conceptual awakening can happen. The “light bulb” comes on as folks realize that, once heating, cooling, and electric<br />

loads are moved into a new range, systems possibilities are greatly expanded. This is where building <strong>design</strong> becomes<br />

exciting: where <strong>the</strong> mechanical engineer and architect begin to collaborate on <strong>the</strong> <strong>design</strong> of external shading devices<br />

as a cooling system element of a building, and where <strong>the</strong> reality of achieving zero-energy performance in a building<br />

moves from an abstract dream to an achievable <strong>design</strong> goal.<br />

For example, <strong>the</strong> evaluation of load reducing <strong>design</strong> strategies in <strong>the</strong> high performance classroom, that ultimately<br />

inspired <strong>the</strong> classroom <strong>design</strong> at Mount Angel Abbey Academic Center in Oregon, indicated that it was possible to<br />

maintain occupant comfort without any conventional mechanical systems. Cooling season comfort was maintained by<br />

passive ventilation and internal <strong>the</strong>rmal mass. Heating season comfort was maintained by energizing electric lighting<br />

(or small electric heaters). In a very real <strong>integrated</strong> way, <strong>the</strong> heating and cooling systems were actually a syn<strong>the</strong>sis of<br />

envelope insulation, floor and ceiling mass, and daylighting strategies.”<br />

The Project Manager’s Role<br />

The role of <strong>the</strong> project manager is critical to <strong>the</strong> successful delivery of an <strong>integrated</strong> <strong>design</strong> process. A project manager<br />

can take very real steps to organize project roles and responsibilities to deliver <strong>integrated</strong> solutions that meet project<br />

performance goals. Such steps may include.<br />

• Train staff in <strong>the</strong> use of <strong>design</strong> tools and analytical techniques that help reveal synergistic opportunities<br />

between context, programming, and architectural and engineering <strong>design</strong>.<br />

• Assign individuals <strong>the</strong> responsibility for delivering <strong>integrated</strong> solutions or specific services. For example,<br />

ra<strong>the</strong>r than maintaining daylighting <strong>design</strong> and electric lighting as separate activities, task someone with an<br />

<strong>integrated</strong> lighting solution.<br />

<strong>Meeting</strong> <strong>the</strong> <strong>2030</strong> <strong>Challenge</strong> <strong>With</strong> Integrated Design<br />

3


Commissioning and post-occupancy evaluation are two additional activities, not directly related to <strong>the</strong> <strong>design</strong><br />

process, which should be added to <strong>the</strong> project schedule because of <strong>the</strong> quality of <strong>the</strong> information <strong>the</strong>y can provide.<br />

Commissioning is critical to assure that <strong>the</strong> <strong>design</strong> intent and owner’s requirements are met and that systems function<br />

as <strong>design</strong>ed. Post-occupancy evaluation will help measure, verify, and document building performance and occupant<br />

satisfaction; and provide important feedback about <strong>the</strong> success of <strong>integrated</strong> <strong>design</strong> solutions that <strong>the</strong> <strong>design</strong> team<br />

can incorporate into a continuous improvement process.<br />

Integrated <strong>design</strong>, with <strong>the</strong> potential to spur rethinking of <strong>the</strong> <strong>design</strong> process, can make an enormous contribution<br />

toward achieving <strong>2030</strong> <strong>Challenge</strong> goals.<br />

Kent Duffy, FAIA, SRG Architects, when speaking of his experiences exploring <strong>integrated</strong> <strong>design</strong> solutions on projects<br />

such as <strong>the</strong> Lillis Business Complex (University of Oregon, Eugene, OR) and <strong>the</strong> Mount Angel Abbey Academic Center<br />

(Saint Benedict, OR) has said:<br />

“Creating buildings of this caliber requires a<br />

remarkable level of collaboration founded upon<br />

four important cornerstones: 1) a knowledge base<br />

that comes from in-depth research; 2) exceptional<br />

engineering that efficiently reaps <strong>the</strong> rich potential of<br />

latent environmental forces such as daylight, radiant<br />

energy, wind, and pressure differentials; 3) great care<br />

in shaping spaces that inspire <strong>the</strong> people who occupy<br />

<strong>the</strong>m as well as thoroughly addressing <strong>the</strong>ir comfort;<br />

and 4) clearly communicating all of this to those who will<br />

occupy, operate and maintain <strong>the</strong>se buildings so that<br />

<strong>the</strong> buildings can, in fact, live up to projected levels of<br />

effectiveness and environmental benefit.”<br />

Mt. Angel Abbey Library<br />

BETTERBRICKS IS AN INITIATIVE OF THE NORTHWEST ENERGY EFFICIENCY ALLIANCE.<br />

BETTERBRICKS.COM

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