2-Pack 310 Replacement Filter Compatible with AprilAire Whole House Air Purifiers Models 1310, 2310, 3310, 4300, MERV 11 Air Purifiers, Size:20x20x4 (Actual size:19.41x19.8x4.02in)

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• Compatible Models: 310 Replacement Filter size of 20 x 20 x 4(Actual size:19.41x19.8x4.02in) is Designed to perfectly fit 310 Whole House Models 1310, 2310, 3310, 4300,Ensure your Filter Replacement fits seamlessly into your existing system.
• MERV-11 Air Filter: 310 replacement Air filter is MERV 11 rating effectively traps 95% of dust, This synthetic fiber filter cotton offers low resistance and a long service life. The soft and light fiber filter cotton material provides excellent air permeability, ensuring optimal airflow throughout your home.
• Foldable design, Easy installation: We brings you a convenient folding design that allows the air filter element to achieve maximum airflow Replacing, installing the filter is a breeze, with no assembly, cardboard, or metal reinforcement required. Plus, the foldable design enables easy storage when not in use.
• Cost Effective: Included 2 pack 310 MERV 11 replacement filters. Installation is simple and easy, we recommend replacing the filter every 6-12 months for optimal performance (depending on your usage and environment).
• Customer Happiness: We are committed to providing exceptional customer service. If you have any questions, please don't hesitate to reach out to us. Our dedicated customer service team is available 24H and will reply promptly, ensuring you receive high-quality support and assistance.