100% Outside Air – Is it Really One of the Best Solutions for Flushing Buildings?

In the age of COVID, we have to look at all available – and viable – options for occupant safety.

To help slow the spread of the coronavirus, ASHRAE, CDC (Centers for Disease Control and Prevention) and WHO (the World Health Organization) currently recommend running HVAC systems for a minimum of 4 hours (but preferably more) on a daily basis with 100% outside air (OA) to “flush out” the virus. I would love to be 100% on board with this recommendation all year round. But I’m not.

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