06/17/2026
Some “IAQ problems” are not IAQ problems.
They may involve humidity, temperature, controls, noise, maintenance, air distribution, or aging equipment.
But once a classroom complaint is labeled as an Indoor Air Quality issue, the response can quickly go in the wrong direction.
Add more outdoor air.
Buy new equipment.
Pursue a more extensive retrofit than the problem requires.
Yet the complaint remains.
A classroom can meet ventilation requirements and still feel too humid after rain, too cold near the windows, too loud when the unit ramps up, or drafty under a diffuser.
IAQ is an important part of Indoor Environmental Quality. But it is only one part.
Before school districts invest in equipment changes, facility teams need to understand what is happening in the classroom, what may be driving it.
In this guide, we explain what to check first when a classroom feels stale, humid, drafty, uncomfortable, or too loud.
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