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Do Humidifiers Need Filter Replacement?
Overview
Whether a humidifier needs filter replacement depends on type: evaporative humidifiers’ filters (wicks) need regular replacement, while most ultrasonic models have no filter or only a washable screen.
| Type | Filter Replacement? | Schedule / Notes |
|---|---|---|
| Evaporative | Yes | Replace wick every 1–3 months |
| Ultrasonic | Mostly no | Only a washable screen |
| Warm-mist | Depends | Some need filters |