Can Air Purifiers Work With Open Windows?

There is a myth that room air purifiers are only effective when the windows are closed. Let’s find out whether that is true.

Room air purifiers work regardless of whether the windows are opened or closed

Regardless of whether the windows are opened or closed, room air purifiers are effective at cleaning the air in a room. Cleaning performance may be reduced depending on the extent of which the windows are open.

There are a few factors to consider when deciding whether or not to keep them opened or closed.

Which environment is more “dangerous”?

The only question you need to ask yourself is whether the outdoor environment or indoor environment is more “dangerous”.

The outdoor environment is more “dangerous” if there is haze or wildfire smoke coming from the outside, or if one of the inhabitants of your home has a pollen allergy issue.

The indoor environment is more “dangerous” if someone is ill with COVID-19 or influenza, or if you just renovated or painted your house, which could be a source of formaldehyde.

If the outdoor environment is more “dangerous”, closing the windows would be the best approach to limit the amount of pollutants coming in from the outside.

If the indoor environment is more “dangerous”, opening the windows could help increase natural ventilation and remove indoor air pollutants at a faster rate.

Conclusion

Room air purifiers work regardless of whether the windows are open or closed. You can decide whether or not to keep them open or closed depending on the situation.