Harvard professor highlights importance of ventilation for 'healthy buildings'

Joe Allen believes rethinking building design, with an eye on better ventilation systems, is crucial for public health.

Joe Allen thinks about air a lot. Specifically, the air we breathe indoors.For the Harvard professor, founder of the university's Healthy Buildings Program, our building design and public health officials have ignored indoor air systems for too long – that is, until the COVID pandemic hit.But by then, it was too late. That lack of attention contributed to tens of thousands of COVID cases, Allen says.

It found that by using a school's fans and air ducts to exchange indoor air with outdoor air five times per hour, the risk of COVID infections decreased by at least 80%. In the U.S., it took until this past May for the Centers for Disease Control and Prevention to recommend an air exchange rate at all. 'If you look at the way we design and operate buildings –and I mean offices, schools, local coffee shop – we haven't designed for health,' Allen said.

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