BREATHE CLEAN, FRESH, AND PURE AIR GermGuardian genuine HEPA air purifier filters reduce unwanted odors and trap allergens to deliver refreshing air to your home. WHY USE GENUINE GERMGUARDIAN FILTER REPLACEMENTS Your purifier is only as powerful and effective as the filter you put inside, and our Genuine Guardian Technologies replacement parts are essential for maintaining product performance. Each filter or bulb is designed specifically for a particular unit style. Not only will genuine replacement parts fit like a glove, but they also have the combination technology to match so that you can get the most out of your air purifier.