Do it 18" x 24" x 1" MERV 8 Furnace Filter efficiently captures dust, pollen, pet dander, and dust mite debris, reducing up to 75% of large airborne particles. With an optimal 3-month lifespan, it ensures cleaner air flow, minimizes strain on HVAC systems, and comes at an price. Breathe easier with this effective allergen reduction filter. Model Number: DB1-1824-8-12