08/17/2026
ASHRAE Standard 241 should be the standard in every school in this country.
Standard 241 was the first standard to answer the question schools had been dodging for decades: how much clean air does a room actually need to reduce disease transmission. It sets equivalent clean airflow targets, and it was written for occupancy types including schools.
It is voluntary. It is not building code. It should be.
And here is the part that should stop you. Most schools are not even meeting the code already in place. When researchers assessed every room in Oregon's largest school district against Standard 241 and against the existing ventilation code, only 27 percent of classrooms met the code minimum for outdoor air. Twelve percent were receiving no outdoor air at all.
That code minimum is the floor. It was never written to stop disease transmission. And most classrooms are below it.
So do not ask whether the air is okay. Ask:
How many air changes per hour in my child's classroom?
What is the filter rating?
Does this district operate to ASHRAE Standard 241?
When was any of it last verified?
Make 241 the standard.
Wail of a Tale Productions is a 501(c)(3) building the evidence that moves clean air from a suggestion to a standard. Your gift funds that work and is tax deductible.
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