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The Shark HP135 uses a HEPA filter system, and its lifespan depends on usage and environment. Under normal conditions, the filter typically lasts about 12 months. If you have pets, allergies, or clean daily, it’s best to replace it every 6 to 9 months. Foam or pre-motor filters should be cleaned monthly and replaced every 4 to 6 months. Signs that it’s time to replace the filter include reduced suction, persistent odors, visible damage, or an increase in dust around your home. HEPA filters are not washable, so regular replacement is essential for maintaining performance, while foam filters can be rinsed and dried completely to extend their life.
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