You might want to double check your math. 😉Each one does 1300 cubic feet per hour. My house is about 1700 square feet, so the air gets filtered about 1.5+ times per hour. These have been a game changer for our indoor air quality.
I bought a Winix air purifier to help with the dust in the basement because of the wood furnace. Now that it’s been decommissioned I moved it upstairs. We’ve had some pretty smoggy days this past week due to wildfires up north so I’ve been running it pretty much non-stop.