Wildfire Season Has Become a Business Risk Every Facility and CRE Leader Should Plan For in 2026

Wildfire season strains buildings and people. See how facilities can prepare in 2026 to reduce costs, protect tenants, and build resilience.

Ava Montini

Mar 11, 2026

Written by

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The Business Side of Smoke Days

When wildfire smoke drifts into a region, the strain on buildings is both immediate and multi-layered. Filters load faster, pushing fans to use more power just to keep airflow steady (EPA). As systems deviate, alarms trigger more frequently, and maintenance teams are pulled from planned tasks into reactive changeouts (Facility Executive). Meanwhile, vendors across the region see surging demand; parts and pads that usually arrive in days might take a week or more (NC State). That delay alone can unravel even the most rigorously planned preventive maintenance schedules.

Inside the building, occupants feel a different side of the same event. They note scratchy throats, irritated eyes, or rooms that feel stale or “heavier” when fresh air intake is reduced (AirNow). They see Air Quality Index alerts on their phones and news headlines escalating (EPA AQI). In those moments, the question is no longer just whether systems are responding, it’s: Is the building protecting me? When communication is missing or unclear, perception can trump technical measures, tipping the balance from confidence to complaints (BOMA).

Why It Matters More in 2026

The stakes are rising. Multiple studies show that during wildfire events, indoor air can reach one-third to three-quarters of outdoor particulate concentrations in buildings lacking robust mitigation (PMC). Residential buildings in fire-affected areas have shown infiltration ratios reflective of this risk (PMC). In some wildfire-impacted care environments, indoor concentrations have peaked near 200 µg/m³ (NCBI). In contrast, well-configured filtration systems often reduce that exposure to roughly 43% of outdoor levels, showing how effectively mitigation can work (NCCEH).

The human health impacts are significant. Fine particulate matter (PM₂.₅) is linked to asthma flare-ups, reduced lung function, and cardiovascular stress (EPA). Sensitive populations (children, older adults, and those with pre-existing conditions) are most at risk (CDC). However, research also shows that even healthy adults are not immune to short-term exposure (PubMed). Harvard-led studies estimate that wildfire smoke has caused over 15,000 premature deaths in the U.S. in recent decades, with an associated economic burden of $160 billion (Harvard). For employers and property leaders, this translates into absenteeism, healthcare costs, and measurable productivity loss (National Bureau of Economic Research).

At the same time, smoke is a mechanical stressor. It accelerates filter clogging, pushes fans outside their normal operating range, and drives up energy consumption (ScienceDirect). Facility executives consistently report higher unplanned maintenance costs during wildfire season, along with shortened asset life for critical HVAC equipment (Facility Executive). Viewed at scale, these costs ripple upward into operational budgets and capital planning, making smoke days not just a maintenance issue but a financial liability.

What Smoke Events Do to Commercial HVAC Systems

Wildfire smoke can be seen as just “dirty air", but to get deeper, it is a dense mix of ultrafine particles, ash, organic compounds, and combustion byproducts that behave differently from typical urban pollution.

When these particles enter HVAC systems, three operational challenges occur simultaneously:

Rapid filter loading and front loading: Fine smoke particles quickly accumulate on the front face of filter media rather than distributing evenly through the depth of the filter. This “front loading” effect increases resistance to airflow much faster than normal particulate loading.
Fan energy increases: As pressure across the filter bank rises, fans must work harder to maintain airflow.
Airflow imbalance: Systems designed for stable pressure conditions may struggle to maintain balanced ventilation across zones.

During heavy smoke events, these mechanical effects can compound quickly. What begins as a minor filtration issue can cascade into comfort complaints, airflow deviations, and unexpected service calls.

Rethinking Preparedness

Preparedness today requires more than having spare filters in storage. Facilities that treat smoke season as part of their risk portfolio are proving more resilient. Research shows that buildings operating with lower baseline pressure drops have more headroom when smoke events occur, allowing systems to maintain airflow without tipping into alarm states (ScienceDirect). Forward-looking teams also map their most critical zones (like labs, classrooms, care units, or executive suites) and prioritize them during smoke events, an approach recommended in EPA guidance for schools and commercial buildings (EPA).

Another resilience factor is vendor readiness. Case studies after the 2020 smoke season showed that supply chain bottlenecks caused delays of days to weeks in replacing filters and components, leaving unprepared facilities exposed (NC State). Facilities that negotiated priority contracts in advance were able to maintain schedules even during regional demand surges. Similarly, using AQI forecasts and on-site PM₂.₅ sensors has been shown to improve response times; by acting early, facilities reduce exposure and minimize tenant complaints (PMC).

Wildfire readiness also intersects with broader sustainability and ESG commitments. Poor indoor air quality during smoke events undermines health-related certifications like WELL and LEED, while higher fan energy use increases a building’s carbon footprint (USGBC; IWBI). Integrating smoke resilience into ESG strategies provides measurable benefits for investors and stakeholders while demonstrating a proactive approach to tenant wellness.

Three Questions Facility Leaders Should Ask Before Smoke Season

Forward-looking facility teams increasingly treat wildfire smoke the same way they treat winter storms or heat waves: as a seasonal operational risk.

Before wildfire season begins, three questions can help identify vulnerabilities:

1. How much airflow headroom does the HVAC system have?

Buildings operating near maximum pressure limits may struggle when filters load rapidly during smoke events.

2. Are replacement filters and components secured in advance?

Regional smoke events often trigger sudden demand spikes, delaying shipments and increasing costs.

3. Are response protocols clearly defined?

Teams should know when to increase filtration, adjust outdoor air intake, and communicate with tenants.

Facilities that answer these questions early often respond faster and maintain better building performance during smoke days.

The Bottom Line

Facilities without strong preparedness can see indoor pollutant levels rise to 75% of outdoor concentrations during wildfire events, while prepared buildings cut that exposure nearly in half (NCCEH). Harvard-led analyses estimate that wildfire smoke causes tens of billions of dollars in annual economic damage, largely through absenteeism and healthcare costs (Harvard). From a mechanical standpoint, smoke accelerates filter clogging, forces fans to operate at higher energy use, and shortens asset lifespan, driving up costs across operations and capital planning (Facility Executive).

The buildings that are prepared today will reduce alarms, complaints, and unplanned expenses tomorrow, while earning the trust of the people inside. Tenants will remember which buildings felt steady, cared for, and resilient when the outside air was anything but.

At the Intersection of IAQ and Sustainability: Enhancing Indoor Air Quality Through Green Building Standards

Jennifer Crowley
Mar 18, 2024
3 min read

Updated: Jul 8, 2024

Image of an impressive indoor structure within a large glass room. The structure is covered in lush greenery and featured multiple waterfalls — Green building standards intersect with indoor air quality (IAQ) to create healthier indoor environments

In the pursuit of healthier indoor environments, the convergence of indoor air quality (IAQ) and sustainability has emerged as a critical focus for building designers, developers, and occupants alike. Green building standards offer a comprehensive framework for achieving both environmental sustainability and optimal IAQ, ensuring that buildings prioritize the health and wellbeing of their occupants while minimizing their ecological footprint.

Indoor air quality (IAQ) profoundly influences our health, productivity, and overall wellbeing. As we spend the majority of our time indoors, ensuring clean and healthy air within buildings is paramount. Green building standards provide guidelines and best practices for achieving sustainable, healthy indoor environments that benefit both people and the planet.

The Importance of IAQ: Poor indoor air quality can lead to a range of health issues, including respiratory problems, allergies, and even chronic conditions such as asthma. Additionally, indoor air pollutants can impair cognitive function, reduce productivity, and negatively impact overall quality of life. By prioritizing IAQ, buildings can create healthier, more comfortable spaces for occupants to live, work, and thrive.

Image of female working on her laptop in an office building lobby embellished with lush greenery suspended from the high ceilings — Indoor greenery and biophilic design elements promote IAQ and occupant wellbeing by filtering airborne pollutants, reducing stress, and fostering connection with nature.

Understanding Green Building Standards: Green building standards, such as LEED (Leadership in Energy and Environmental Design) and WELL Building Standard, incorporate IAQ criteria into their certification requirements. These standards aim to minimize environmental impact, promote sustainability, and enhance occupant health and wellbeing. By addressing factors such as ventilation, filtration, and materials selection, green buildings can significantly improve IAQ while reducing energy consumption and greenhouse gas emissions.

Key Strategies for Enhancing IAQ:

Graphic image of air and dust entering a polarized filter and coming out he other side as clean air. — High-efficiency air filters minimize indoor air pollutants for healthier indoor environments

Filtration: High-efficiency air filters can capture airborne pollutants such as dust, pollen, and mould spores; improving IAQ and reducing the risk of respiratory problems. Green building standards often specify minimum filtration requirements to ensure effective air cleaning.
Ventilation: Proper ventilation is essential for maintaining good IAQ. Green building standards advocate for the use of natural ventilation whenever possible and require mechanical ventilation systems to deliver fresh outdoor air to indoor spaces.
Materials Selection: Choosing low-emission building materials and furnishings can help minimize indoor air pollutants such as volatile organic compounds (VOCs) and formaldehyde. Green building standards encourage the use of environmentally friendly materials that are free from harmful chemicals.
Indoor Plants: Incorporating indoor plants into building design can help improve IAQ by naturally filtering airborne pollutants and increasing oxygen levels. Green building standards may include provisions for indoor greenery to promote healthier indoor environments.
IAQ Monitoring: Regular monitoring of IAQ parameters such as temperature, humidity, and pollutant levels is essential for maintaining optimal indoor air quality. Green building standards may require IAQ testing and monitoring as part of ongoing building operations and maintenance.

Looking up at exterior foliage from within a glass office building — Maximize natural ventilation and daylight to reduce reliance on mechanical HVAC systems

Case Study: Green Buildings & IAQ: Consider the Bullitt Center in Seattle, Washington, one of the greenest commercial buildings globally, achieving both LEED Platinum and Living Building Challenge certification. The Bullitt Center exemplifies how prioritizing IAQ within green building standards positively impacts occupants' health and environmental sustainability.

Impact of Priorities:

Ventilation and Natural Light: The Bullitt Center's design maximizes natural ventilation and daylighting, reducing the need for mechanical HVAC systems while enhancing occupant comfort and wellbeing. Ample access to fresh outdoor air and natural light promotes a healthy indoor environment conducive to productivity and wellbeing.
Filtration and Materials Selection: The building incorporates high-efficiency air filtration systems and low-emission building materials, minimizing indoor air pollutants and creating a healthier indoor environment for occupants. By selecting environmentally friendly materials, the Bullitt Center reduces off-gassing and VOC emissions, further enhancing IAQ.
Indoor Plants and Biophilic Design: Indoor greenery and biophilic design elements promote IAQ and occupant wellbeing by filtering airborne pollutants, reducing stress, and fostering connection with nature. The Bullitt Center's integration of plants and natural elements creates a harmonious indoor environment that supports both physical and mental health.
IAQ Monitoring and Continuous Improvement: Regular IAQ monitoring and maintenance practices ensure ongoing optimization of indoor air quality within the Bullitt Center. By tracking IAQ parameters and addressing any issues promptly, the building management team maintains a healthy indoor environment that prioritizes occupant health and comfort.

Enhancing indoor air quality through green building standards is paramount for creating healthy, sustainable indoor environments that promote occupant health and wellbeing. By implementing key strategies outlined in green building standards and prioritizing IAQ considerations, buildings can significantly improve indoor air quality while reducing their environmental impact.

As we continue to embrace the principles of sustainability and IAQ optimization in building design and construction, we move closer to a future where every indoor space fosters health, productivity, and sustainability for occupants and the planet alike.

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