A small change can make a big difference in your home environment. The Aprilaire 213 Healthy Home Allergy Air Filter removes common airborne allergens including dust pollen, mold spores, bacteria, pet dander, and dust mites as they pass through the MERV 13 filter. In addition, your HVAC system is protected from airborne particles, which helps lower your energy costs, and can prolong the life of your equipment. Discover a healthier home environment with the Aprilaire 213 Healthy Home Allergy Air Filter. 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 surface 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 13.