Air Exchange Rate Calculator

The Air Exchange Rate, or air changes per hour, refers to the number of times air is replaced within a room each hour. The CDC recommends increasing the air exchange rate to reduce the spread of COVID-19. There is no established threshold yet, but experts typically recommend an air exchange rate of 3 to 6 per hour. Whether a space is supplied by a central HVAC system or a unit ventilator, this calculator can help you determine the air exchange rate.

Calculate Air Exchange Rate