Filter-Monster 20x20x1 Ultimate Allergen Defense MERV 13 Pleated HVAC Air Conditioner Furnace Replacement Air Filter 4 Pack

At Filter Monster, we have over 25 years of experience helping customers breathe cleaner, healthier air with filtration solutions that combine performance, reliability, and value. Our ultimate allergen defense MERV 13 HVAC filters are designed to provide extra protection against a wide range of airborne contaminants that cause issues for allergy sufferers. The MERV 13 HVAC filters capture up to 90% of particles sized .3 to 10 microns, including common irritants like dust, pollen, mold spores, pet dander, lint, and smoke. This makes them an excellent choice for households with allergy sufferers, pets, or anyone serious about having the cleanest indoor air possible. What sets Filter Monster apart is our bold blue filter media, which serves as a quick, built-in identifier for MERV 13 performance. Seeing this bold blue media makes it easy to identify from other ratings during purchasing, handling, or installation—helping ensure you always get the right filter the first time. If you have allergy sufferers in your home, or have to deal with wildfire smoke — blue is right for you. Affordable, resilient, and exactly what most homes need. Each package includes four (4) filters, providing up to a full year of clean air when replaced during the recommended time of every 90 days. For optimal performance, replace sooner if the filter becomes dirty, damaged, or if indoor air quality conditions demand it. Each filter also features a clearly marked label with an airflow direction indicator and a space to record the installation date, giving you peace of mind and helping maintain your HVAC system’s efficiency.