EverFilter 21 1/2x23 5/16x1 is our aluminum, lifetime re-usable HVAC filter frame with our pre-cut MERV-8 filter media insert. The durable aluminum frame and high airflow backing paired with MERV-8 air filter media is the perfect combination for a quality air filter. Unlike pleated air filters which clog up very quickly and strain your HVAC motor, EverFilter allows for efficient airflow while still capturing airborne particles. Our material is resistant to corrosion which means your filter frame can be reused for the lifetime or your HVAC system. EverFilter is a direct alternative to disposable pleated air filters and produces less waste since you can reuse the filter frame. EverFilter’s pre-cut air filter replacements are cost-effective, saving you money every year on required HVAC maintenance. EverFilter is compatible with a wide variety of air filter media and can be used in multiple filtration applications. Use cases include Residential HVAC Systems, Commercial HVAC Systems, Paint Booths, Dust Collection, Machining Shops, Apartment Units and more! 
 Disclaimer: 
The filter media included is NOT WASHABLE and will need to be replaced every 30-90 days depending on the environment. Only the aluminum air filter frame is reusable. 
Purity Air uses a light compression packing method for orders with multiple filter media pads. This shipping method does not affect the filtration capabilities of the lofted filter media. The filter media will return to normal loft after 24-72 hours. The filter media loft/thickness is 3/4" +- 1/8"-1/4" tolerance during the manufacturing process. Regardless of the thickness the filtration capabilities remain the same and will still fit in our EverFilter reusable AC furnace filter frame. This packing method allows our products to be offered to you at the lowest possible cost which helps decrease your HVAC system maintenance.