| how to buy a good air purifier | 1.18 | 0.5 | 9873 | 30 | 99 |
| what is a good air purifier to buy | 0.64 | 0.8 | 2289 | 34 | 55 |
| what's a good air purifier to buy | 1.63 | 0.1 | 4486 | 33 | 1 |
| how to pick a good air purifier | 0.34 | 0.7 | 556 | 31 | 59 |
| how to choose a good air purifier | 0.98 | 0.7 | 7837 | 33 | 88 |
| where to buy a air purifier | 1.55 | 1 | 156 | 27 | 34 |
| air purifier to buy | 1.99 | 0.4 | 591 | 19 | 94 |
| cheap and good air purifier | 0.52 | 0.8 | 1407 | 27 | 41 |
| air purifier any good | 0.25 | 0.8 | 9035 | 21 | 15 |
| good cheap air purifier | 0.43 | 0.8 | 9891 | 23 | 73 |
| buying an air purifier | 0.75 | 0.1 | 1939 | 22 | 43 |
| best deal on air purifier | 0.66 | 0.2 | 1426 | 25 | 19 |
| looking for air purifier | 0.84 | 0.8 | 7359 | 24 | 73 |
