PERFECT FIT COMPATIBILITY：This 310 replacement filter fits perfectly with AprilAire 1310 2310 whole house air purifiers in size 20x20x4 inches. Please confirm your equipment model number before placing an order to avoid mismatch issues.
MERV 11 HIGH-EFFICIENCY FILTRATION: This 310 air filter replacement has a MERV 11 rating and effectively captures dust, lint, pet dander and other air particles, providing a cleaner and healthier home environment.
LOW-RESISTANCE OPTIMAL AIRFLOW DESIGN：Our 310 furnace filter adopts high-quality multi-layer synthetic fiber material with low air resistance and steady airflow. It avoids excessive pressure inside ventilation ducts, keeps HVAC units operating at standard efficiency, reduces energy waste and cuts monthly electricity costs.
WIDE-RANGING APPLICATIONS:Designed for versatile use, our replacement filter reliably supplies clean, fresh air to residences, offices, schools, hospitals, and various commercial venues, making it an ideal choice for building healthier indoor environments across a wide range of settings.
EASY TO INSTALL : The 310 air filter can be easily replaced and installed without the use of any tools, and it measures 20 x 20 x 4 inches (nominal size is not the actual size).
