Fast-Shipped-Filters 3 Pack 21.5x23.5 Replacement Filters Pads Designed to Fit Perfect Air Plus Polarized electrostatic air filter refill White

Description

• 3 - 21.5x23.5 Perfect Air Plus Filter Replacement Polarized Pads
• 1. Actual Filter Size 20x21
• 2. Replace Every 1 to 4 Months: Depending Local air quality for optimal performance
• 3. Some filter pads may have a Alummin target. Thats because the manufacturer switched to a cheaper carbonized mesh instead of using a full activated-carbon sheet. To make the pad work, they had to add a foil target so the electrode could make contact.
• 4. Fast-Shipped-Filters stayed with the original full-carbon center design, which carries the electrical charge evenly across the entire filter. Because of this, no aluminum patch or painted target is neededthe electrode makes solid contact anywhere on the pad.

Original Air Cleaner pads did not include an aluminum or painted target. Those patches were added later when the design was changed to a lower-cost carbonized mesh center. This mesh material contains holes and does not carry the electrical charge evenly, so the patch provides a consistent point of contact for the electrode.

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