Indoor Air Quality in Schools: Key Behaviors to Address

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The air inside schools can be up to 100 times more polluted than outdoor air, affecting both health and learning. Poor air quality contributes to asthma, the leading cause of school absences due to chronic illness, and can reduce student focus and performance. Everyday behaviors, like blocking vents or using scented products, worsen these issues, while simple changes can make a big difference.

Key Takeaways:

Health Impact: 1 in 13 children has asthma; mold and poor ventilation are major triggers.
Performance Impact: Cooler classrooms (68°F) improve focus and test performance.
Behavioral Causes: Blocking vents, improper cleaning, and using VOC-emitting products harm air quality.
Solutions: Clear vents, use low-VOC products, report leaks, and maintain HVAC systems.

Quick Fixes for Better Air:

Students: Avoid blocking vents, minimize scented products, and report symptoms early.
Staff: Use approved cleaning products, address mold and leaks quickly, and reduce clutter.
Administration: Implement IAQ policies, maintain HVAC systems, and educate the school community.

Improving air quality requires combining better habits, updated policies, and modern HVAC systems. Schools that prioritize these steps create healthier spaces for students and staff.

Indoor Air Quality and Asthma Management in Schools

Problem: Behaviors That Damage Indoor Air Quality

Understanding and addressing harmful habits is key to improving indoor air quality (IAQ). Everyday actions in schools – whether by students or staff – can significantly impact air quality, often creating a cycle where pollutants build up throughout the day. Both groups contribute in unique ways to these challenges.

Student Behaviors That Harm IAQ

Students often unknowingly hinder air circulation by blocking ventilation units with backpacks, coats, or books, restricting airflow and reducing the effectiveness of these systems ^[5]. Personal care products, such as perfumes, colognes, and scented body sprays, release volatile organic compounds (VOCs) into the air, which can trigger asthma attacks in sensitive individuals.

Improper waste disposal is another issue. Trash left in lockers or classrooms attracts pests like mice and cockroaches. A study involving 37 elementary schools found mouse allergens in 99.5% of school dust samples ^[4]. These pests leave behind droppings and dander, which are potent asthma triggers.

Students may also bring allergens like pet dander into the school on their clothing. Additionally, when water spills or minor leaks go unnoticed, mold can grow in carpets or other porous materials, releasing spores into the air. Opening windows at the wrong time can also let in outdoor pollutants, such as vehicle exhaust from idling buses or mold spores, further worsening IAQ.

Staff Behaviors That Harm IAQ

Staff actions also have a major impact on air quality. Using cleaning products that emit VOCs can degrade air quality, while blocking ventilation units with books or other items reduces fresh air circulation ^[5]. Covering air return ducts with posters or student work further disrupts airflow.

Neglecting to promptly clean up spills or moisture in carpets promotes mold growth, which releases harmful spores into the air. Poor vacuuming practices can turn carpets into reservoirs for dust, pollen, and mold spores, which are easily stirred up during daily activities. Additionally, scheduling maintenance tasks like painting or floor stripping while students are present traps pollutants indoors.

Classroom pets with fur or feathers can introduce dander that triggers allergies. Staff use of scented personal care products can add to VOC levels, while improper food storage attracts pests, potentially leading to pesticide use that further compromises air quality.

Identifying these behaviors is a critical first step toward making meaningful improvements in IAQ, benefiting everyone in the school environment.

Solution: Better Behaviors for Students and Staff

Student and Staff Behaviors That Harm vs Improve Indoor Air Quality in Schools

Creating healthier practices doesn’t require massive changes – just small, consistent efforts from both students and staff. These shifts in behavior can make a big difference in improving indoor air quality (IAQ) and creating a healthier school environment. The goal? Make these behaviors part of the daily routine.

How Students Can Improve IAQ

Students play a crucial role in maintaining good indoor air quality. One simple habit is to keep vents clear – unblocked vents ensure proper airflow. Students should also report symptoms like headaches, nausea, or dizziness, as these could signal IAQ problems.

"Students and parents can serve as essential members of a school’s IAQ management team to advocate for a healthy learning environment." – US EPA

Another way students can help is by cutting back on personal care products like perfumes, body sprays, and scented lotions, which can release unnecessary indoor pollutants. For those with asthma, following their personalized Asthma Action Plan and informing school staff of any environmental triggers is critical. Some schools even encourage students to join IAQ committees, where they can share insights about classroom conditions and help develop solutions.

How Staff Can Support IAQ

Staff members have a significant impact on air quality, too. Reporting issues like leaks, mold, musty odors, or weak airflow as soon as they’re noticed can prevent small problems from escalating into bigger ones. For classrooms, consider replacing allergenic pets like furry or feathered animals with alternatives like fish ^[2].

Reducing clutter is another helpful step. Items like stuffed animals, heavy curtains, and upholstered furniture tend to collect dust and allergens. Stick to district-approved, low-VOC cleaning products, and when using materials like paints or markers, keep containers sealed when not in use to minimize chemical emissions.

It’s also essential to act quickly when spills happen. Cleaning and drying spills within 24–48 hours can stop mold from forming ^[7]. For dusting, use a damp cloth to avoid stirring up particles into the air. Lastly, set HVAC fans to the "ON" position instead of "AUTO" to ensure continuous air filtration. A simple tissue paper test near vents can confirm if the system is effectively circulating air ^[8].

Solution: Administrative Steps to Promote IAQ Awareness

When it comes to improving indoor air quality (IAQ) in schools, administrative action is the backbone of lasting change. While individual efforts matter, they’re only effective when supported by clear policies and education initiatives led by school leadership.

Creating and Enforcing IAQ Policies

To ensure consistent progress, schools need a formal IAQ plan. A written plan transforms good intentions into actionable steps, outlining goals, procedures, and responsibilities. For example, in 2012, 47.7% of school districts had an IAQ management program, with 82.3% of those based on the EPA’s IAQ Tools for Schools guidance ^[6]. This was a notable improvement from 35.4% in 2006 ^[9].

A great starting point is appointing an IAQ Coordinator. This person leads a team made up of facilities staff, teachers, and parents, ensuring everyone is on the same page. The coordinator oversees activities, conducts regular walkthroughs, and ensures all team members understand their roles. Key actions include scheduling HVAC maintenance – like filter replacements and outdoor air checks – designed to meet ASHRAE standards (15 cubic feet per minute per person in classrooms) ^[11].

Other policies can directly target air quality improvements, such as:

Using green cleaning products that are low in volatile organic compounds (VOCs) and certified by third parties.
Implementing an integrated pest management plan that prioritizes non-chemical solutions.
Reducing outdoor pollutants by controlling building access points.
Scheduling pollutant-releasing activities – like painting or floor stripping – during times when the building is unoccupied.

"IAQ management was never a question, it was an answer. It supports the health of our students, so they can attend school and meet their full potential. It supports the health of our staff, without whom educating students is impossible. Finally, it helps me as an administrator run a more efficient school district, where I can stretch my budget further and channel limited resources where they are needed most: in the classroom." – School Official ^[6]

Educating Students, Staff, and Parents

Policies are only as effective as the commitment of the people implementing them. That’s why communication and education are key to success. Building trust through transparency – like sharing program goals, walkthrough findings, and results – helps engage the entire school community. Hosting school-wide events can also raise awareness and generate enthusiasm for IAQ initiatives ^[11].

Providing role-specific IAQ checklists is another practical step. For example, custodial staff can use them to identify risks, while teachers and nurses can spot early warning signs of air quality issues. Regular training sessions for custodial teams on using green cleaning methods and high-efficiency vacuums ensure these practices are consistently applied.

Empowering teachers and school nurses is especially important since they often act as first responders to health concerns. This is critical when you consider that nearly 1 in 13 school-age children has asthma, a leading cause of absenteeism tied to chronic illness ^[10].

Finally, tracking metrics like IAQ complaints, nurse visits for respiratory issues, attendance rates, and repair costs can show progress. These numbers not only highlight the program’s impact but also help justify continued funding and support.

Combining Behavior Changes with High-Efficiency HVAC Upgrades

Pairing smarter occupant habits with advanced HVAC systems creates cleaner air and healthier spaces for learning. This combination of upgraded technology and informed behavior forms a well-rounded strategy for improving school environments.

How High-Efficiency HVAC Systems Help

Modern HVAC systems deliver steady, controlled ventilation that adheres to ASHRAE’s standard of 15 cubic feet per minute per person in classrooms ^[11]. While opening windows might seem like an easy fix, it’s often unreliable due to factors like outdoor noise, weather conditions, and the stack effect, which can draw pollutants between floors ^[5]^[12]. High-efficiency systems, on the other hand, ensure a consistent supply of filtered air, regardless of what’s happening outside.

These systems also offer financial advantages. In new buildings, they can reduce annual utility bills by 20% to 40%, and in renovations, by 20% to 30% ^[1]. However, maintenance is key. A well-maintained system with average efficiency can outperform a poorly maintained high-efficiency system in terms of energy savings ^[3].

When advanced technology is paired with proactive behavior, measurable health benefits emerge. For example, regular HVAC upkeep can cut respiratory symptoms by up to 60% ^[3] and reduce indoor pollutants by 29% ^[8]. Doubling classroom ventilation rates can even boost student performance on standardized tests by 8% to 10% ^[3].

E3 Design-Build Contractor offers Texas school districts advanced HVAC and building automation solutions tailored to the high-density nature of schools. Their systems, combined with IAQ-focused practices, address the fact that indoor pollutant levels are often 2 to 5 times higher – and sometimes over 100 times higher – than outdoor levels ^[5]^[12]. To fully capitalize on these systems, integrating building automation enhances their responsiveness and effectiveness.

Building Automation and IAQ Monitoring

Building automation works hand-in-hand with advanced HVAC systems, ensuring ventilation adapts dynamically to real-time conditions. For instance, Demand Control Ventilation (DCV) systems use CO2 sensors to adjust outdoor air dampers based on actual occupancy ^[11]. This automation eliminates guesswork and guarantees that classrooms receive the fresh air they need, even when room usage varies.

For these systems to function at their best, technology and occupant behavior must align. Sensors won’t work properly if blocked by posters or furniture, which is why staff and students play a critical role as "human sensors." Reporting unusual odors, stagnant air, or visible moisture helps identify issues early ^[8]. Teachers can also use portable CO2 monitors – available for less than $100 – to check ventilation levels. CO2 readings above 1,000 ppm signal inadequate fresh air supply ^[8].

E3’s building automation systems bring monitoring, control, and data visualization together on a cloud-based platform. Facility managers can remotely track indoor conditions, spotting and addressing potential problems before they escalate ^[12]. Systems equipped with Variable Frequency Drives (VFDs) adjust to actual occupancy levels, and schools that implement IAQ-conscious scheduling can enjoy lower energy bills ^[11]. Meeting ventilation standards costs just a few dollars to about $10 per person annually ^[4], a small price for better health and academic outcomes.

This approach highlights an essential reality: the indoor environment is shaped by the interplay between building design, mechanical systems, and how people use the space ^[1]^[5]. Technology alone isn’t enough to solve IAQ challenges, nor is behavior. But when schools adopt clear policies, educate occupants, and install advanced HVAC systems from experts like E3, they create environments where students and staff can thrive.

Conclusion: A Complete Approach to Healthier School Environments

Creating healthier school environments through improved indoor air quality relies on a combination of three key elements: occupant behavior, administrative policies, and advanced HVAC technology. None of these elements can succeed in isolation. For instance, even the most advanced HVAC systems won’t perform well if vents are obstructed or unapproved cleaning products are used. Likewise, positive behaviors can’t compensate for outdated or poorly maintained mechanical systems. When these components are integrated, however, the results are clear, as shown by real-world success stories.

Take Charlotte-Mecklenburg Schools in North Carolina, for example. This district, which serves 140,000 students across 176 schools, transformed an air quality crisis into a lasting program. They achieved this by combining technical benchmarking, rigorous staff training, and a revamp of maintenance practices ^[11]. Similarly, Katy Independent School District in Texas implemented a forward-thinking program that brought senior managers and campus health representatives together to prioritize air quality and health monitoring ^[11].

For Texas districts looking to adopt this holistic approach, E3 Design-Build Contractor offers essential technical solutions. Their services include high-efficiency HVAC systems, building automation, and indoor air quality monitoring tools. E3’s design-build process ensures proper installation and maintenance of mechanical systems. Plus, their cloud-based platforms provide real-time insights into indoor conditions, addressing the stark reality that indoor pollutant levels can be 2 to 5 times higher – and sometimes more than 100 times higher – than outdoor levels ^[5].

FAQs

What are the fastest ways to spot an IAQ problem in a classroom?

There are a few telltale signs that a classroom might have indoor air quality issues. These include:

Visible mold or mildew: Spotting these on walls, ceilings, or other surfaces is a clear red flag.
Unusual odors: Persistent smells, especially musty or chemical-like ones, can signal underlying problems.
High humidity levels: If humidity rises above 50%, it can create a breeding ground for mold and other allergens.
Leaks or moisture issues: Water damage or damp spots often point to hidden problems that need attention.
Evidence of smoking or vaping indoors: These activities release harmful pollutants that can quickly compromise air quality.

Tackling these problems as soon as they’re noticed is crucial for creating a healthier space for both students and staff.

When should we avoid opening windows in schools?

When deciding whether to open windows in schools, it’s crucial to consider potential safety and health risks. Open windows could lead to accidents, such as falls, or expose students and staff to extreme temperatures. Additionally, outdoor air might carry allergens or pollutants that could worsen asthma symptoms. Ensuring a secure and healthy indoor environment should always take precedence.

What should a school’s IAQ plan include?

A school’s Indoor Air Quality (IAQ) plan should aim to manage and improve air quality in a structured way. To get started, securing support from leadership is essential. From there, forming a dedicated team to oversee the plan and establishing clear procedures will help ensure its success.

Key areas to focus on include controlling pollutants, managing moisture to prevent issues like mold, and maintaining proper ventilation systems. Regular communication with staff, students, and parents is also crucial. Keeping everyone informed and involved helps maintain transparency and encourages collaboration.

Finally, ongoing monitoring and routine maintenance are necessary to keep the plan effective and adaptable to the school’s specific needs. These steps create a healthier environment for everyone.