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College campuses once operated around a predictable rhythm. Classrooms filled during the day, buildings emptied in the evening, and summer created a window for maintenance, renovations, and renewal.

That rhythm has largely disappeared.

Today’s academic buildings often remain active well beyond scheduled class hours. Students move between lectures, project work, faculty meetings, research, study sessions, and campus organizations without leaving the building. Many facilities also stay busy throughout the summer with research programs, conferences, and camps, that may include the usage of student housing.

For facilities staff and campus leaders, the shift is about more than longer hours. Continuous occupancy changes how buildings operate. HVAC systems run longer, maintenance windows shrink, energy strategies become more complex, and indoor environmental quality has a greater influence on the student experience. Infrastructure that once operated largely behind the scenes becomes a visible part of campus life.

When students stay longer, buildings work harder

Students may never notice the engineering behind a building, but they quickly notice when it isn’t working. Spaces that are too warm, poorly ventilated, noisy, or uncomfortable become places students avoid. The most successful campus buildings are often the ones students stop thinking about altogether because the environment supports whatever they need to do next.

That experience is shaped by dozens of design and engineering decisions working together. Lighting, air quality, thermal comfort, acoustics, and spatial flexibility all influence whether a building becomes a place students pass through or one they choose to stay in.

Lighting systems, for example, must support different activities throughout the day. A classroom may require clear, uniform lighting during instruction, while a study room may benefit from dimming controls that create a calmer setting later in the evening. Spaces with access to daylight often take on a different character after dark, becoming popular gathering areas for group work sessions and informal study.

Ventilation and thermal comfort play an equally important role. Academic buildings now support fluctuating occupancy across classrooms, labs, collaboration spaces, and lounges. Systems need to respond to those changing patterns without drawing attention to themselves. In a building where students move seamlessly between activities, consistency becomes part of what makes the experience successful. HVAC controls that have the ability to sense changing occupancies and maintain comfort have become a standard.

Comfort is only one part of the equation. As academic buildings support longer hours of use, students also need to feel confident using those spaces throughout the day and evening. Access control systems, electronic locks, and card-based entry can help campuses balance openness with security, allowing study areas, collaboration spaces, and academic facilities to remain available while maintaining appropriate levels of access after hours. These systems play an important role in creating safer campuses while supporting the flexibility students expect from modern academic environments. As activity extends beyond the traditional academic day, thoughtful security planning becomes another element that helps buildings feel welcoming, usable, and supportive of the faculty and student experience.

The most effective academic buildings support a wide range of activities without sacrificing comfort, efficiency, or reliability. Delivering that experience consistently depends on systems that can adapt to changing occupancy patterns while operating efficiently throughout longer days. As buildings become places where students spend more of their time, engineering performance becomes part of the overall campus experience. Continuous occupancy changes the energy equation

More hours of occupancy do not automatically translate into less efficient buildings.

What changes is how campuses consume energy and the strategies available to manage it. As buildings remain active later into the evening, institutions often have fewer opportunities for traditional temperature setbacks and other scheduled reductions. At the same time, longer operating hours can create opportunities to take advantage of favorable outdoor conditions, depending on the climate and building design.

In some cooling-dominant regions, later occupancy can create operational advantages. As outdoor temperatures drop, air handling equipment can use economizer operation to bring in more outdoor air, reducing reliance on mechanical cooling. Under the right temperature and humidity conditions, buildings can maintain comfort while using less energy-intensive cooling strategies.

In colder climates, the equation is different. Buildings that once allowed temperatures to fall overnight may need to remain warmer because students continue using them into the evening. That reduces opportunities for heating setbacks and can increase energy consumption. Similar challenges can appear in very hot climates where cooling demand remains high long after daytime classes have ended.

These differences make energy planning far more nuanced than simply extending operating schedules. A student-centered academic building in New England, Texas, or California may support similar activities, but the operational strategy behind it can look very different.

For many campuses, the first step is understanding how buildings are performing today. Energy audits, retro-commissioning, and utility assessments provide a baseline for identifying operational improvements before larger capital investments are considered. Rather than applying the same energy conservation measures across all buildings, many institutions benefit from a layered energy-savings strategy that reflects how individual facilities are used.

Those assessments can identify where controls or operating schedules no longer match occupancy patterns and where targeted improvements can reduce energy use without compromising comfort. In some buildings, the greatest opportunity may lie in optimizing controls and operational sequences. In others, it may involve upgrading equipment, modernizing building automation systems, or addressing aging infrastructure. The goal is to align energy investments with each building’s role on campus rather than relying on one-size-fits-all solutions.

The same assessments often reveal another consequence of continuous occupancy: buildings have fewer opportunities to take systems offline for routine maintenance and equipment renewal. As operating hours expand, maintaining reliability becomes just as important as improving efficiency.

Designing for maintenance without disruption

A campus that remains active across more hours gives facilities teams fewer quiet windows to maintain equipment. That changes how institutions think about redundancy, equipment selection, and long-term operating costs.

Redundancy does not necessarily mean doubling every system. More often, it means designing systems that allow maintenance to occur without disrupting building occupants. For example, during typical operating conditions, one boiler can continue serving the building while the other undergoes maintenance. In residence halls, multiple water heaters can help prevent a single equipment issue from affecting hundreds of students.

Air handling systems provide another example. Older systems often relied on one large fan and motor. Many newer systems use multiple smaller fans that can continue operating if one component fails. Maintenance teams gain greater flexibility, and the risk of a single issue affecting an entire building is reduced.

These decisions influence much more than occupant comfort. They affect maintenance schedules, staffing requirements, overtime costs, repair planning, and long-term facility operations. If equipment can be serviced during normal working hours instead of the least occupied hours of the night, institutions can reduce both disruption and operational burden.

When downtime disappears

For decades, colleges and universities could count on a predictable construction season. Summer created an opportunity to modernize infrastructure, complete major renovations, and take buildings offline with limited disruption to campus operations.

That window is becoming increasingly difficult to find.

Many campuses now operate year-round. Buildings that appear available on an academic calendar may still be supporting important institutional functions. Residence halls may be occupied, laboratories may remain active, and academic facilities may be used for camps, community programs, or special events.

The University of Notre Dame’s Campus Crossroads expansion reflects this broader shift. By transforming the football stadium into a year-round destination for academics, student life, research, recreation, and events, the university expanded the value and utilization of this iconic space.  As institutions seek to maximize engagement and return on investment, more campus facilities are expected to support activity across a larger portion of the calendar.

For facilities leaders, this changes more than scheduling. It changes how infrastructure projects are delivered.

The challenge is often not designing the upgrade but maintaining continuity while it is implemented. Mechanical, electrical, and utility modernizations increasingly require phased construction, temporary systems, redundant capacity, and carefully coordinated cutovers so that critical functions remain operational. A power upgrade may need to support active research throughout construction. An HVAC replacement may have to be completed without disrupting summer housing or conference operations. The success of a project depends as much on transition planning and operational resilience as on the final design itself.

As a result, infrastructure decisions are becoming closely tied to institutional risk. Projects must be evaluated not only for cost, schedule, and performance, but also for their impact on academic programs, student services, research activities, campus events, and revenue-generating operations. In an environment where true downtime may no longer exist, resiliency increasingly means finding ways to renew critical infrastructure while the campus continues to run.

Infrastructure becomes a campus-wide strategy

A campus-wide perspective creates opportunities that individual projects can’t.

Quinnipiac University provides a strong example of this campus-wide approach. As part of the South Quad development, Salas O’Brien designed a central utility plant to serve multiple new facilities, including a residence hall, the School of Business, and a new academic building. Rather than maintaining separate heating and cooling systems in each facility, the university consolidated them into a centralized plant, improving efficiency, simplifying maintenance, and supporting future campus expansion.

 

The project highlights a broader shift in campus planning. Infrastructure is increasingly viewed not as a collection of building-level systems, but a strategic asset that can improve reliability, reduce operating costs, and support long-term institutional priorities. A campus-wide approach creates opportunities to:

• Increase efficiency by consolidating systems and reducing duplication.
• Improve reliability through added redundancy and more resilient utility networks.
• Lower long-term costs by coordinating investments and avoiding piecemeal upgrades.
• Support future growth by expanding capacity before it becomes a constraint.
• Reduce disruption by aligning infrastructure work with planned renovations and capital projects.

This broader perspective also changes how institutions approach capital investment. Rather than waiting for equipment to fail, campus-wide planning helps prioritize upgrades, coordinate projects, and spread investment over time. The result is fewer emergency replacements, better alignment with institutional goals, and infrastructure that can support both current operations and future growth.

This becomes particularly important as campuses consider electrification, aging assets, energy performance goals, and future growth. Electrical capacity that appears sufficient today may become a constraint as buildings are renovated or new facilities are added. Older air handlers, boilers, pumps, and distribution systems may still be functioning, but delaying renewal can limit options and increase costs over time.

A campus-wide view provides a clearer framework for decision-making. Which systems are approaching the end of their useful life? Where would additional redundancy reduce disruption? Which upgrades should occur before a planned building project makes them more expensive? Which investments support multiple institutional priorities at the same time?

As campuses function more like small cities, infrastructure planning shifts from focusing on individual systems to creating a connected framework for growth. Energy systems, utilities, academic buildings, residence halls, maintenance strategies, and future development all influence one another. Institutions that recognize those relationships are better positioned to control costs, improve reliability, and adapt to changing student expectations over time.

Infrastructure planning, in turn, becomes more than a facilities exercise. It becomes a long-term strategy for supporting extended dwell times and the people who learn, teach, work, and live on campus every day.

How Salas O’Brien can help

Planning for a campus that remains active throughout the day and across the year requires a broader perspective than any single building can provide.

Salas O’Brien partners with colleges and universities to evaluate existing infrastructure, understand future needs, and align investments with long-term campus goals. Through facility assessments, utility planning, infrastructure studies, and campus master planning, we help institutions make informed decisions that support both campus operations and the student experience.

As student needs continue to evolve, thoughtful infrastructure planning can help your campus remain adaptable, reliable, and ready for what comes next.

Planning for a campus that never stops starts with a conversation. Contact [email protected] or connect with our contributor below to discuss your goals and challenges.

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