Compatible with 210 Whole House Air Purifier Models:1210, 1620, 2120, 2200, 2210, 2210, 2216, 3210, 4200 or Space-Gard 2200 Upgrade Kit 1213 and other models of whole house air purifiers. Filtration Rating: The MERV 11 effectively filters a wide range of airborne debris. Measuring 16x25x4, it is precisely matched to the corresponding air purifier to ensure a perfect fit and efficient filtration. Made of high quality filter material to ensure long life and superior filtration performance. Highly effective in filtering out dust, pet hair, smoke and other tiny particles, providing clean and healthy indoor air. Exact Fit: Designed for specific models in theline, it's easy to install and requires no fiddly adjustments. REPLACEMENT RECOMMENDATIONS: To maintain optimal performance of your air purifier, it is recommended that you change your filter regularly. Depending on the environment and frequency of use, it is generally recommended to replace the filter every 3-6 months.The ZHOP210 Replacement Filter breathes new life into your whole-house air purifier so you can continue to enjoy a fresh, healthy indoor air environment. You and your family will breathe fresher and live more comfortably!