| Query | User |
|---|---|
| air cleaner cigarette smoke | entered by user 1009948 |
| air purification systems | entered by user 4485742 |
| air purification systems | entered by user 13113664 |
| air purifier | entered by user 6510477 |
| air purifiers | entered by user 420096 |
| electronic air cleaner | entered by user 4376488 |
| electronic air purifiers | entered by user 3577131 |
| electronic air purifiers | entered by user ditto |
| electrostatic air filters | entered by user 909258 |