Are you bothered by the amount of dust and other particles in the air and on the furniture in your home? The Aprilaire 210 Clean Air Filter is the perfect addition to your clean home tool kit. The Aprilaire 210 Clean Air Filter traps airborne dust as it circulates through the filter - reducing your cleaning time and frequency and allowing you to enjoy your clean home even more. The Aprilarie 210 Clean Air Filter is rated MERV 11 which means it traps airborne impurities as they pass through the filter that would otherwise float through the air and eventually settle on your furniture and flooring. Your HVAC system is protected from airborne particles too, which helps lower your energy costs, and can prolong the life of your equipment.Genuine Aprilaire filters are specifically engineered to work with your Aprilaire air cleaner. They are effective for 6-12 months compared to the traditional 1-3 month filter, saving you time and money. Our 4-inch filters provide more filter area for harmful particles to be captured compared to the traditional 1-inch filters. Aprilaire's patented self-seal technology assures no air will pass by unfiltered, keeping your home clean and HVAC system operating at peak performance. Note: MERV is a scale used to measure the effectiveness of air filters. Higher number values translate to more effective filtration. Choose the Aprilaire Filter with the MERV rating that fits the needs of your family and home. *Performance tested to ASHRAE 52.2 Standard, minimum efficiency reporting value - MERV 11