24x24x1 (23.38 x 23.38) Accumulair Diamond 1-Inch Filter (MERV-13) - 4 PACK

High-Efficiency Filtration: Captures over 90% of particles 1.0–3.0 microns and 75%+ of particles down to 0.3 microns—ideal for smoke, dust, and bacteria. Health-Focused Design: Recommended for homes with allergy or asthma sufferers, elderly residents, or high-usage areas like home offices. Convenient and Compatible: Fits most 1-inch standard HVAC systems and comes in a 4-pack for easy quarterly replacement.