Only Applicable to Storm LGR Extreme Dehumidifier MERV-8 filter captures the majority of “larger” airborne particles after the air blew into the machine. It can protect inner component from the congestion of impurities from the air taking in from outside. Also at the same time ensure the maximum airflow supply volume. Filter Dimensions: 9.9 ×12.2 × 0.4 inches Lasting up to 6 months, this depends on the air quality of the space in which the filter is used, we suggest to replace the filter every 3-6 months. AlorAir Commercial Dehumidifiers Storm LGR Extreme, Only Applicable to Storm LGR Extreme Dehumidifier