User Manual Q&AAnswer
Oct 13, 2025 - 04:44 PM
According to the user manual for the Guardian Technologies AC151 Compact Air Purifier, the filter replacement indicator will light up when it is time to replace the filter. Depending on your usage and environmental conditions, the filter will typically last approximately 6 months. It is important to maintain and change the filter regularly to ensure the air purifier continues to operate effectively. You can also visually inspect the filter for dirt accumulation - the inside pleats of the filter will turn from white to grey when it is dirty and needs replacing. Remember not to wash and reuse the filter; contact Customer Service to purchase a replacement filter or visit the Guardian Technologies website for more information.
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