The phrase "to filter the air" means to remove harmful particles or impurities from the air so that it becomes cleaner and safer to breathe. Full definition
In an energy - efficient building, it is important to have a ventilation strategy to promote a continuous supply of fresh filtered air in the building. (zehnderamerica.com)
Rooms and suites are loft - style and have floor - to - ceiling windows, soaking tubs, in - room dining, filtered air systems and artwork from a local artist. (tripsavvy.com)
We have them in our homes to filter the air for our heat and A / C. (humblemechanic.com)