Feature: Outstanding Compatibility: Our furnace filters are compatible with a wide range of AprilAire models, including 1210, 1620, 2210, 2216, 3210, 4200, and Space Gard 2200 with an upgrade kit. This versatility ensures an ideal fit for various HVAC systems, providing seamless integration and better performance High-Performance Purification: This HVAC filter features a MERV 11 rating, effectively absorbing and capturing a wide array of airborne impurities. It excels at filtering out minute particles and harmful substances such as pollen, secondhand smoke, pet dander, and debris, ensuring that the air in your environment remains cleaner and healthier Flawless Fit: Our AC filter measures 16 x 28 x 4 inches, precisely fitting your equipment space. It seamlessly aligns with your air conditioner's intake and outlet vents, effectively preventing air leakage through gaps. This ensures that all air passes through the filter, reducing resistance and enhancing both the operational efficiency and purification performance of your HVAC system Stable & Durable: The pleated structure of these air conditioner filters ensures that dust is evenly distributed within the filter media, allowing for greater dust and impurity accommodation. This design maximizes the filtration capacity, reduces the frequency of filter replacements, and lowers maintenance costs, providing a reliable and long-lasting filtration solution Installation Is A Breeze: Installation is straightforward and no-hassle. Simply follow the instruction manual - no professional tools are required. The filter expands for immediate use without the need for assembly, making the process quick and effortless Package Content: 2 x Furnace Filters 1 x User Manual