When to Change Humidifier Filter


Isn’t it comforting to know that the air you breathe inside your home can be cleaner and more refreshing? One factor to make this possible are the filters inside activated humidifiers. Since constant use means a gradual accumulation of debris, mold, and dust, you should know when to change humidifier filter.

The frequency of filter maintenance depends on specific conditions.

The average lifespan of a humidifier filter in normal conditions is three months. Meaning, you only have to replace the filter once every three months only. Convenient, right?

However, if you’re going to use your humidifier every single day, then maintenance would become a more frequent thing. You’ll be required to change the filter once every two months. Always remember this to prevent dirty air and device malfunction.

Meanwhile, there are some humidifiers that use mineral absorption pads. If you’re going to use this type of device, waiting for two to three months before replacement is a bad idea. You really have to replace the filter every two to three weeks to stop the release of mineral deposits.

Lastly, even if you’d use a standard humidifier lightly, the rule of thumb is to change the filter every month if your area is using hard water. Hard water contains a lot of mineral salts which will clog your filter quickly. If you won’t replace the filter pronto, massive accumulation of white dust is inevitable.


You should know when to change humidifier filter to prevent the emission of mold, debris, and dust. This will also contribute to your device’s longer lifespan. The average frequency for filter maintenance is once every three months while some conditions or factors call for a more frequent replacement.

If you want to avoid the hassle of replacing filters, you may choose to buy filter-free humidifiers. There are also special types of humidifiers because of their oil diffuser function. If you’re curious, learn more about them here.