The AprilAire 213 is the genuine OEM replacement filter for AprilAire 1210, 2210, 2216, 3210, and 4200 whole-house air purifiers. MERV 13 efficiency captures allergens, pollen, mold, bacteria, smoke, and fine particles down to 1.0 micron at the residential whole-house scale.
The 20x25x4 size is the most common AprilAire whole-house slot. Genuine OEM construction matters — third-party knockoffs often skip the heavy-duty media and frame that handle whole-house airflow without bypass leakage.
AprilAire has manufactured HVAC air quality products in Madison, Wisconsin since 1954.
