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

Published on

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.

Mastering Indoor Grow Room Ventilation: A Comprehensive Guide to Optimal Plant Growth in Tents

Jennifer Crowley
Jul 31, 2023
4 min read

Updated: Jul 9, 2024

A collection of cannabis plants growing indoors in a tent with a fan prominently in the foreground — Good ventilation allows plants to have access to the fresh air required for photosynthesis.

Having regulated grow room ventilation ensures that your cannabis plants grow in an optimized environment with temperatures and humidity that allow you to grow the most potent buds. Having insufficient airflow through your grow room negatively affects both yield and quality.

In an indoor environment, plants do not have access to the same sort of fresh air as outdoor plants. Ventilation is at the core of ensuring that the air in your grow tent promotes healthy growth. Good ventilation allows plants to have access to the fresh air required for photosynthesis. Additionally, ventilation helps maintain other indoor air quality factors, such as humidity, temperature and CO2.

Why is Grow Tent Ventilation so Important?

Large greenhouse landscape with grow lights overhead — If a plant gets too much CO2, it will slow down or even stop photosynthesis.

The most common grow room systems use a combination of exhaust fans and ducts or pipes to maintain airflow. And circulation fans are used to keep the air flowing within the room.

CO2 management

Like all other green plants, cannabis transforms light energy into chemical energy through a process called photosynthesis. If a cannabis plant does not get enough CO2, it will continue to grow until its stored sugars are depleted. Once that happens, its metabolism decreases, and it will stop growing. On the other hand, if a plant gets too much CO2, it will slow down or even stop photosynthesis. The trick is finding the right CO2 level for a grow space to maximize photosynthesis and yield.

Optimal CO2 concentration

To obtain growth equivalent to outdoor plants, CO2 concentration should be around 400 ppm in an indoor space with normal fresh air ventilation.

Humidity management

Plants are natural humidifiers, so it only makes that a room full of them will require some sort of humidity regulatory tool. Humidity in the grow room is largely a result of transpiration. Transpiration is the process by which the leaves of the plant give off water to the atmosphere. Much like a straw, the suction created by transpiration pulls nutrients up through the roots as the plant produces water vapour.

In the presence of too much humidity, there is a greater chance of attracting insects and other unwanted pesticides. Along with the excess heat, a ventilation system also dumps out the excess moisture in the air. The dry air takes away some of the water from the upper parts of the plant, forcing the plant to absorb more water through the roots, helping the plant absorb more nutrients.

Pest Control

Stagnant or humid air harms various factors in a grow room, including the topsoil. The medium will remain damp or humid in the room of stale air, attracting fungi, mould, mildew and insects. A healthy level of dryness in the topsoil because of a steady supply of dry air helps slow down the growth of pest populations.

Types of Ventilation in a Grow Room

Illustration of the difference in operation of a passive air intake system vs. an active air intake system — The are small, but important differences in how a Passive air intake system works vs. an Active Intake system.

Passive intake uses natural airflow and negative pressure to bring air into the room. Basically, there is a hole or vent in the grow tent that passively allows air to enter. It does this through pressure differences inside and outside the room. This is like if you opened a window to let in air.

Active intake pulls air into the room with a fan. This actively draws in air to ensure high levels of circulation. The size of the active fan doesn’t matter as much as the air pressure blown in. You should use an active fan that pulls in at least the same pressure rate (and CFM) as the exhaust fan.

Carbon Filters help with odour

A carbon filter mounted outside of air ducting. — A carbon filter helps remove the odours from a grow room.

A carbon filter helps remove the odours from a grow room. A good-quality carbon filter is connected to an extraction fan. The fan pulls air through the carbon filter. As this happens, the activated carbon inside the filter chemically absorbs the terpenes (and other aromatic compounds), locking them inside the carbon filter. The fan then pushes the cleaned air out.

Illustration of the options of mounting your carbon filter inside or outside of your tent — Air Pull or Push options for mounting your Carbon Filter

If you are wondering whether your fan should pull or push the air through a carbon filter, in most grow rooms and tents, the carbon filter is installed first while the fan is pulling the air outside.

With this setup, aromatic molecules along with dust and other unwanted VOCs get efficiently filtered to avoid damage to the fan or accumulation in the duct. However, if you are limited in space and cannot fit your carbon filter inside your setup, you are still able to mount the fan on the wall of the tent or room while air is forced through the filter placed outside. Although not ideal, but acceptable.

Meet the world’s first zero-waste carbon filter.

Close up image of a Blade Air Carbon filter with the various components separated to be able to see the locking mechanisms, canister and filter components — Blade Air's Zero Waste Carbon Filter

Meet Blade Air's Carbon Filter, a zero-waste odour control solution that minimizes facility maintenance time and expenses:

Patented revolutionary replaceable carbon cartridge.
56% reduction in operating expenses.
Made from 70% recycled materials.

Take advantage of significant time and labour savings to save up to 30% on material costs and up to 80% in labour savings, without compromising odour control performance. Learn more about our Carbon Filter or get in touch to discuss how we can help you improve the indoor air quality in your facility.

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