Purifiers are most effective with windows closed. Can we have it both ways – clean air AND open windows?
With the window closed, tests show reduced particulates by an average of 90% after 20 minutes. With the window open, tests show reduced particulates by 60%.
The data shows that it’s clearly better to close the windows with running your air purifier. CAVEAT: Even with the windows open, it’s still possible to significantly reduce indoor particulates by turning on an air purifier (60% vs 90%)
|