The best air purifiers can help filter fine particles, gases and other pollutants from the air you breathe. See our top picks ...

The same thing happens when homeowners replace high-airflow filters provided by installers ... reading back into the target range: Increase air flow to the blower by increasing the size of the ...

We also confirmed that it delivers a consistent, high flow rate of 2.5 gallons per minute (that's pretty good, BTW). Plus, its filter cartridge only needs to be replaced every 12,000 gallons ...