All standard-size Austin Air units are fully compatible with any standard-size filter, meaning you can easily swap out your current filter with one that better suits your needs. For instance, if you originally purchased a standard-size HealthMate® unit and now wish to upgrade to a different filter model, you only need to buy the appropriate replacement filter for your air quality requirements.

When placing an order for your replacement air filter, it's essential to double-check that you've selected the correct size and filter type before confirming your purchase. This precaution helps you avoid any restocking fees that may apply if you accidentally order the wrong filter.

To verify the size of your current filter, simply look for a label on the bottom of your air purifier. If you see the model number HM400, it indicates that your unit uses a standard-size filter. This easy-to-check label will guide you to the right replacement air filter and ensure a smooth upgrade process.