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Hospitals are under constant financial pressure, and wasted energy is quietly making it worse. As operating costs rise and reimbursement tightens, utility spending is consuming a growing share of hospital budgets, often without close scrutiny.

This is not because hospitals can simply “use less” energy. Hospitals are among the most operationally demanding facilities in the built environment. Energy powers life-saving equipment, maintains infection control, and supports reliable care around the clock.

But when infrastructure operates inefficiently, avoidable utility costs quietly divert resources away from care delivery. Energy is often treated as a fixed expense. In reality, it is one of the largest controllable costs in a hospital’s operating budget – and one of the least optimized.

The opportunity is significant. With better visibility and disciplined sequencing, hospitals can reduce waste, strengthen resilience, and redirect dollars back to what matters most: patients and caregivers.

What drains a hospital’s energy (and OpEx) and how to fix it

Hospitals are designed around safety and continuity. Systems are oversized to deliver redundancy. Equipment is often configured to run continuously to minimize risk. Over time, that safety-first approach can quietly translate into excess energy use, especially as buildings evolve and clinical operations change.

Energy waste in hospitals is rarely obvious. More often, it is hidden and cumulative: aging infrastructure, deferred maintenance, controls drift, and systems designed for operating conditions that no longer exist.

Identified below are key contributors to energy loss, along with high-impact, low-capital interventions.

HVAC and central plant: running at full throttle

Hospitals leverage ventilation and temperature control for infection prevention and patient safety. Simultaneous heating and cooling, particularly in temperate climates, is common and frequently unmanaged. It isn’t uncommon for legacy systems to operate at full capacity regardless of real-time demand. Alignment can be achieved without compromising patient safety.

Retro-commissioning identifies setpoint drift, overrides, and balancing issues that accumulate over the years. Controls upgrades and demand-based scheduling allow airflow and conditioning to respond to occupancy and clinical intensity. Variable-speed drives and optimized sequencing enable central plants to modulate rather than default to maximum output.

These interventions can reduce equipment strain, improve reliability, and lower operating costs—without compromising safety.

Aging steam systems: functional but inefficient

Many hospitals continue to rely on steam distribution systems. While functional, aging steam infrastructure is often inefficient. Heat loss from deteriorated insulation, outdated traps, and distribution imbalances is common. At the same time, workforce familiarity with steam systems is declining, leaving complex networks operating sub optimally.

Transitioning toward high-efficiency hot-water systems or incorporating heat-recovery chillers can significantly reduce natural gas use while simplifying maintenance. Heat-recovery chillers capture waste heat generated during cooling and redirect it to heating loads, reducing reliance on boilers.

This shift can improve efficiency, maintainability, and long-term resilience.

Controls and sensors: invisible drift

HFM reports that more than half of hospital systems oversee at least one building that’s over 50 years old. Many existing hospitals operate with outdated control systems that cannot dynamically respond to occupancy, time of day, or evolving clinical use. Sensors – temperature, humidity, airflow – frequently drift out of calibration after 10-15 years. Mechanical systems respond to inaccurate inputs, often overcorrecting and consuming more energy than necessary.

Systematic sensor audits, recalibration, and targeted modernization of controls can restore performance without replacing major equipment. Modern building management systems allow administrative areas and support spaces to operate differently from critical care areas, aligning energy use with actual demand.

Individually, these improvements may seem incremental. Together, they can materially reshape a hospital’s operating profile.

A sustainability framework for long-term energy reduction

Hospitals operate continuously and cannot “power down” during off-peak hours. As per a recent MDPI study, space heating, ventilation, water heating, and cooling together account for about 63% of total energy use in healthcare facilities, driven by stringent air‑quality and thermal requirements.

Long-term reduction requires disciplined sequencing rather than isolated upgrades.

• Right-size: Reduce unnecessary demand first. Restore systems to intended performance through retro-commissioning, controls optimization, sensor calibration, and load validation. For new construction and renovations, size HVAC and central plants for actual operational needs. Utility providers often incentivize these measures because reducing demand lowers grid strain. Programs from organizations such as PG&E, BC Hydro, and Energy Trust of Oregon can offset upfront costs and improve project economics when engaged early in planning.
• Recover: Capture energy already being produced. Hospitals frequently generate simultaneous heating and cooling loads. Heat-recovery chillers and energy recovery ventilation systems redirect waste energy to productive use, reducing fuel consumption without increasing operational risk. These measures often qualify for performance-based incentives, further strengthening lifecycle returns.
• Reinforce: Layer in renewable or low-carbon solutions once efficiency is optimized. Solar PV, geothermal systems, energy storage, and green power procurement are most cost-effective when applied to an already right-sized system. At this stage, renewable investments enhance resilience and cost predictability rather than compensating for inefficiency.

By sequencing investments – Right-Size, Recover, Reinforce – hospitals avoid stranded capital, maximize financial return, and strengthen the infrastructure that supports clinical care.

A path forward: building a culture of performance visibility

Reducing energy waste in hospitals is not only a technical exercise but also an organizational shift. Sustainable results depend on embedding energy performance into how the enterprise operates, plans, and measures success.

Visibility turns energy from an invisible overhead cost into a strategic lever for reliability, financial planning, and patient-centered operations.

Modern analytics, submetering, and integrated building data give facilities and executive teams the ability to:

• Identify hidden inefficiencies that are otherwise masked by continuous operations.
• Prioritize investments using real performance insights rather than assumptions.
• Translate facilities data into executive decision-making, helping leadership align around shared outcomes.
• Incorporate energy considerations into capital planning, supporting modernization efforts that strengthen clinical resilience.

Rather than a one-time initiative, performance visibility creates a continuous improvement loop—one that supports reliable environments, more predictable budgets, and long-term stewardship of hospital infrastructure.

How can Salas O’Brien help with energy waste in hospitals?

Salas O’Brien partners with hospitals across North America to address complex energy performance challenges – from detailed modeling and retro-commissioning to MEP design and long-term sustainability planning. We combine deep expertise with practical, on-site evaluation to identify high-impact opportunities and strengthen project economics.

Our integrated approach draws on experience across building typologies while remaining grounded in the realities of clinical operations. We work alongside facilities teams and executive leadership to thoughtfully sequence investments, model financial outcomes, and secure available utility incentives to improve returns.

Contact our experts below to discuss your energy challenges or reach out at [email protected].

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