| water filter | 43 |
| air filter | 41 |
| hepa filter | 30 |
| ivc filter | 15 |
| uv filter | 12 |
| oil filter | 6 |
| furnace filter | 4 |
| nd filter | 1 |
| effect | 88 |
| response | 41 |
| frequency response | 7 |
| transfer function | 1 |
| the blower compartment | 0.44 |
| the lid | 0.33 |
| the water | 0.31 |
| fluid communication | 0.30 |
| the chamber | 0.30 |
| electronic device | 0.29 |
| remove contaminant | 0.68 |
| trap dust | 0.67 |
| remove dust | 0.67 |
| clean the air | 0.65 |
| remove odor | 0.64 |
| remove allergen | 0.63 |
| remove impurity | 0.62 |
| transmit light | 0.61 |
| clean the water | 0.61 |
| block visible light | 0.59 |
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| damage | 0.28 |
| pulmonary embolism | 0.20 |
| different manufacturers | 0.34 |
| other companies | 0.32 |
| cook medical | 0.21 |
| a merv rating | 0.65 |
| zeolite | 0.48 |
| catalyst | 0.48 |
| two parts | 0.48 |
| resistance | 0.48 |
| inlet | 0.47 |
| the option | 0.47 |
| cutoff | 0.46 |
| effect | 0.45 |
| label | 0.45 |
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| regular replacement | 0.51 |
| cleaning | 0.49 |
| little maintenance | 0.46 |
| change | 0.44 |
| frequent replacement | 0.37 |
| range | 0.31 |
| frequent attention | 0.28 |
| device | 0.59 |
| small, cage-like devices | 0.33 |
| medical devices | 0.30 |
| water purification | 0.45 |
| fashion and beauty appl… | 0.39 |
| chemical plants | 0.30 |
| purifying | 0.30 |
| larger castings | 0.30 |