Indoor air quality refers to the measurable conditions of the air inside your buildings - specifically levels of CO₂, fine particulate matter (PM2.5), volatile organic compounds (VOCs), mold spores, and other pollutants. It matters in schools because children spend 6-8 hours a day breathing that air. Poor IAQ is linked to increased absenteeism, aggravated asthma and respiratory issues, reduced cognitive function, and worse academic performance.

The most common problems are elevated CO₂ from inadequate ventilation (especially in older buildings), fine particulate matter from outdoor traffic and indoor sources, VOCs off-gassing from cleaning products and building materials, mold and mold spores from humidity issues, and airborne pathogens that spread respiratory illness. Many schools have several of these problems simultaneously without knowing it.

Elevated CO₂ levels measurably reduce cognitive function - students in poorly ventilated classrooms score lower on assessments and have more difficulty concentrating. PM2.5 and other pollutants aggravate asthma and allergies, leading to missed school days. Even moderate air quality issues cause headaches and fatigue that undermine learning throughout the day.

The EPA and CDC encourage schools to adopt comprehensive IAQ management plans, and ASHRAE 241 (published in 2023) is the first national standard specifically addressing airborne pathogen control in occupied buildings. Some states have their own requirements. Demonstrating proactive IAQ strategies also helps schools qualify for federal and state funding.

Opening windows helps with CO₂ and general ventilation when weather allows. But it does nothing for PM2.5 from outdoor traffic, pollen, wildfire smoke, or outdoor pollution. It also creates temperature control problems, raises energy costs, and is impractical during much of the school year in most climates. Air purification addresses what ventilation alone cannot.

Without monitoring, you don't. Complaints about stuffiness, headaches, or odors are symptoms, but they don't tell you what's actually in the air. The only way to know is to measure it. That's why we start every engagement with the AirGradient monitoring system - it gives you real data instead of guesses.

HVAC handles air temperature, movement, and basic ventilation. It was not designed to filter fine particulate matter, remove VOCs, or eliminate airborne pathogens. Upgrading HVAC filters to higher MERV ratings increases restriction on the system, forces fans to work harder, and can compromise your HVAC performance. HVAC and air purification solve different problems.

CO₂ (using NDIR technology), PM2.5 (using laser scattering), TVOCs and NOx (using Sensirion SGP41 sensors), and temperature and humidity (using Sensirion SHT3x/4x sensors). It auto-calibrates every 7 days and feeds data to the Erlab dashboard continuously.

A one-time test shows you a snapshot - what the air looked like during the hour someone was there with equipment. Continuous monitoring shows you patterns. CO₂ spikes during third period. PM2.5 rising during arrival and dismissal. Humidity creeping up in the east wing every afternoon. Those patterns tell you where the real problems are and how to fix them..

Real-time data on every parameter being measured, a wellness score for each monitored space, yesterday's AI-generated report, data comparisons over time, weekly and monthly reports, critical area alerts, and predictive analysis. You can see your entire district's air quality from one screen.

The wellness score is a composite rating that reflects the overall air quality in a monitored space, based on all measured parameters - CO₂, PM2.5, TVOCs, temperature, humidity, and more. It gives you a quick read on which spaces are healthy and which need attention, without requiring you to interpret each data point individually.

It depends on your buildings. The goal is to monitor representative spaces - classrooms, cafeterias, gymnasiums, administrative areas - to understand air quality patterns across your facilities. We'll develop a placement plan based on your building layouts and concerns.

We install AirGradient monitors in your facilities and you get access to the Erlab dashboard. For three weeks, you see your buildings' actual air quality data - CO₂ trends, PM2.5 levels, humidity patterns, the full picture. At the end, the data either confirms your air is fine (and you have documentation proving it) or it shows you exactly where the problems are. Complete the trial and you get 15% off your entire HALO order.

The HALO is a ceiling-mounted air purification system built by Erlab, a company that has manufactured filtration equipment for chemical and biological laboratories since 1968. It uses H14 laboratory-grade HEPA filtration combined with Erlab's proprietary Carbon AX technology to remove fine particulate matter, airborne pathogens (viruses, bacteria, mold, fungi), and volatile organic compounds from indoor air.

Harmful airborne particles - viruses, bacteria, mold spores, ultra-fine particulate - rise above the breathing zone and stay suspended for hours. Ceiling placement pulls contaminated air upward and away from occupants, filters it, and returns clean air through four diffusers that create uniform circulation. Floor-level and tabletop purifiers create horizontal airflow that can redistribute particles from one person toward another.

Portable units sit at floor level and push air horizontally, which can move contaminated air from person to person. HALO mounts at the ceiling where harmful particles concentrate, draws air upward and away from occupants, and distributes clean air uniformly through four diffusers. It's the difference between a space heater and a heating system. The HALO also uses laboratory-grade H14 HEPA filtration - a higher standard than what most portable units offer.

One HALO provides one complete equivalent air change per hour (eACH) for approximately 1,000 square feet of floor space. A typical classroom needs one unit. Larger spaces like cafeterias, gymnasiums, and auditoriums need more. Every district gets a tailored placement plan based on actual room dimensions, ceiling height, and occupancy.

It depends on the building. A school with 30 standard classrooms, a cafeteria, a gym, and administrative offices would need a different plan than a school with open floor plans or portables. We create building-by-building placement plans based on your actual spaces rather than generic estimates.

Each unit runs on 50 watts - pennies a day in electricity. Compare that to the cost of pushing your HVAC system harder with upgraded filters, which strains your mechanical systems, reduces efficiency, and drives up energy bills substantially.

It's designed for occupied spaces where people need to concentrate, including laboratories where precision work happens. It will not interfere with classroom instruction.

Yes. HALO requires no connection to your HVAC, no ductwork, and no mechanical modifications. It supplements your existing infrastructure without adding load to your mechanical systems. Units mount to your ceiling grid and plug into a standard outlet.

Yes. Each unit has a BMS/BAS alarm contact and an Ethernet port for remote monitoring.

Yes. ARE Labs conducted independent testing in both controlled and real-world conditions. Tests showed significant reductions in particulate load - up to 80% - including against aerosolized viruses. The HALO meets the national standard for reducing airborne infections in occupied buildings (ASHRAE 241).

No. The HALO was engineered for laboratory environments decades before COVID. Indoor air quality concerns in schools include CO₂ buildup, PM2.5, VOCs, mold, allergens, and seasonal respiratory illness - problems that exist every day of every school year regardless of any specific virus.

It mounts to a standard ceiling grid and plugs into a standard electrical outlet. No ductwork. No roof penetrations. No HVAC modifications. No construction disruption. Installation does not require taking classrooms offline for extended periods.

Pre-filter replacement annually. Carbon AX replacement annually. H14 HEPA filter replacement every three years. All filter replacements are included in the AAA plan option.

Installation is minimally disruptive and can happen during the school year. That said, many districts prefer to deploy during breaks for scheduling convenience. Either approach works.

The HALO uses ceiling suspension rings and can be adapted to various ceiling types. We'll do a building walkthrough with your facilities team to confirm installation approach for your specific spaces.

Several sources exist. ESSER (Elementary and Secondary School Emergency Relief) funds explicitly cover air filtration, purification, and monitoring equipment. EPA competitive grants support IAQ management plans in K-12 schools. The DOE's Efficient and Healthy Schools program provides technical assistance and connections to infrastructure funding. The Bipartisan Infrastructure Law and Inflation Reduction Act include grants for ventilation and IAQ upgrades in public buildings.

Yes. Department of Education guidance explicitly lists air filtration, purification, and monitoring equipment as eligible ESSER expenditures. This includes devices like the HALO and AirGradient monitors. Note that American Rescue Plan ESSER funds must be spent by December 31, 2026.

ESSER isn't the only source. EPA IAQ grants (current projects run through 2029), state-level programs, DOE infrastructure funding, and mini-grants like the Go Green Initiative (~$45,000 for pilot projects) are all available depending on your state and district. We'll help you identify which sources apply to your situation.

Yes, though they vary by state. California's CalSHAPE is one example - it provides grants specifically for ventilation, HVAC improvements, and air quality upgrades in public schools. Many states administer State Energy Program (SEP) funds from the DOE that can include IAQ projects. Contact us and we'll help you identify what's available in your state.

Yes. Erlab offers flexible financing through NEC Financial Services for districts that want to move forward now. NEC has been helping organizations acquire equipment since 1989.

Start with data. The 3-week AirGradient monitoring trial gives you real numbers showing what's in your buildings' air. Combine that with applicable funding sources, projected reductions in absenteeism-related costs (substitute teachers, lost instructional days), energy savings versus HVAC upgrades, and the community health impact. We'll help you build a district-specific presentation.

Absolutely. Many districts start with the buildings that have the most complaints or the oldest HVAC systems, install monitors, collect data, and expand from there. The 3-week monitoring trial is specifically designed for this approach. Small-scale mini-grants (~$45,000) can fund an initial pilot that builds the case for district-wide deployment.

Start with monitoring. We'll install AirGradient sensors in your facilities and give you access to the Indoorcare dashboard. You'll see what your air actually looks like before making any purchasing decisions. Complete the 3-week monitoring trial and get 15% off your entire HALO order.

Then you have documentation proving it. That's valuable for parent inquiries, board questions, grant applications, and your own peace of mind. Either way, the data gives you something you didn't have before.

The HALO begins filtering air immediately upon installation. If you're running AirGradient monitors alongside it, you'll see the data change in real time - before-and-after comparisons from your own buildings, not a lab test somewhere else.

Yes. Whether you're a single-building district, managing dozens of facilities, or hundreds, we'll create a plan that fits your scale, your buildings, and your budget. The approach is the same - start with data, address what the data reveals, and prove results through ongoing monitoring.