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day night pleated replacement filter pack AirFiltration 1x Stage One Filter: 1 8″ Lifespan 3 Years 1x Stage One Filter: 1 8″ Foam Prefilter It is recommended you replace your humidifier filter once every 6 months Lifespan: 12 Months Efficiently traps unwanted airborne particles while allowing free flow of cleaner air to maintain your system's energy efficiency
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