How to Replace the PET+Nylon Filter in Your Ovi Humidifier

By Duux | The Flow of Comfort | Published: 2026-10-15

Category: How-to Guides

A practical step-by-step guide to swapping the PET+Nylon filter in your Duux Ovi humidifier, including how often to replace it and the mistakes to avoid.

Quick answer

Replace the PET+Nylon filter in your Duux Ovi humidifier when you notice reduced mist output, a musty smell, or visible discoloration, and always unplug the unit before you start. The genuine Duux PET+Nylon Filter for Ovi is the part designed for this job, so match it to your Ovi model and follow the steps below.

Why the Ovi filter matters

The PET+Nylon filter is the component that helps the Ovi humidifier release moisture evenly. Over time, minerals from tap water and dust from the air collect in the filter material, which can reduce output and cause stale odors. Changing the filter is a simple maintenance task that keeps your humidifier working as intended.

How often to replace the Ovi filter

There is no single interval that fits every home because water hardness, usage hours, and room dust all affect filter life. As a practical rule, check the filter every few weeks during heavy use and replace it when you see buildup, discoloration, or a drop in mist. If you use the Ovi daily in a hard-water area, expect to replace it more often than someone in a soft-water area who runs it occasionally.

Before you start

Unplug the Ovi humidifier from the power outlet and let it cool if it has been running. Place the unit on a flat, water-safe surface and have a towel nearby. Keep the replacement filter in its packaging until you are ready to install it so it stays clean and dry.

Step-by-step: replacing the Ovi filter

1. Unplug and empty the Ovi: Switch off the humidifier and pull the plug from the wall. Remove the water tank and pour out any remaining water. A common mistake is skipping the unplug step or leaving water in the base, which can spill when you tilt the unit. Checkpoint: the unit is unplugged and the tank is empty before you touch the filter.
2. Open the filter compartment: Locate the filter housing on your Ovi model and open it as described in your user manual. Do not force plastic clips or covers; if a part feels stuck, check for a release tab or screw first. Keep any small parts in a bowl so they do not roll away. Checkpoint: the old filter is visible and the housing is fully open.
3. Remove the old filter: Lift the used PET+Nylon filter out of the housing. If it is stuck, wiggle it gently rather than pulling hard, and note how it was oriented so you can match that position with the new one. A common mistake is installing the new filter backwards because the old one was removed without checking its orientation. Checkpoint: you know which way the old filter faced.
4. Install the new Duux PET+Nylon Filter for Ovi: Unwrap the new filter and seat it in the same orientation as the old one. Press it down evenly so it sits flush in the housing. Do not trim, fold, or modify the filter to make it fit; if it does not seat correctly, stop and confirm you have the right part for your Ovi model. Checkpoint: the filter sits flat and the housing closes without resistance.
5. Reassemble and refill: Close the filter compartment, refill the water tank with fresh water, and place it back on the base. Wipe up any spills before reconnecting power. A common mistake is overfilling the tank, which can cause water to reach areas not meant for it. Checkpoint: the tank is seated correctly and no water is pooled around the base.
6. Run and check performance: Plug the Ovi back in and turn it on. Let it run for a few minutes and confirm mist is being produced and there is no unusual noise or leaking. If output is still weak with a new filter, the issue may be elsewhere, such as a dirty base or a mineral buildup in the unit. Checkpoint: steady mist and no leaks. If problems persist, inspect other maintenance points before assuming the filter is faulty.

The replacement part

PET+Nylon Filter for Ovi: PET+Nylon Filter for Ovi is a replacement filter from Duux, offered in a Standard option under SKU DXHUF01. Using the genuine Duux filter ensures the correct fit and material for the Ovi, so you are not forcing a generic filter that may not seal or perform the same way.