MERV 13 PLEATED AIR FILTER 20x20x1: Captures smoke, bacteria, viruses, dust, pollen, and pet dander in your home AC, furnace, and HVAC system. Comparable to MPR 1900 / FPR 10. Actual size 19.75x19.75x0.75. FITS MOST FURNACES, AIR CONDITIONERS, AND HEAT PUMPS: Compatible with Carrier, Bryant, Trane, Lennox, Rheem, Goodman, York, Ruud, Honeywell, Amana, and Payne HVAC systems. Quick replacement for home air filter, furnace filter, and AC filter slots. ELECTROSTATIC PLEATED DESIGN: Electrostatically charged synthetic filter media captures more particles than fiberglass. Moisture-resistant beverage board frame maintains shape for 90 days of reliable airflow and low resistance. 12-PACK FOR YEAR-ROUND CLEAN AIR: Stock up with 12 MERV 13 air filters. Replace every 60-90 days for optimal HVAC efficiency. Extends furnace and AC life while lowering energy costs. MADE IN USA BY FILTRATION GROUP: Aerostar is a trusted residential air filter brand. Designed and manufactured in the United States with rigorous quality control and premium materials. The Aerostar 20x20x1 MERV 13 pleated air filter is a replacement furnace filter, AC filter, and HVAC return air filter for home heating, cooling, and central air conditioning systems. Each pleated furnace filter has a nominal size of 20x20x1 and an actual size of 19.75x19.75x0.75. Measure your existing filter before ordering to confirm fit. The 12-pack of replacement filters provides up to months of home air filter coverage at the recommended 90-day change interval. MERV 13 filtration captures household dust, pollen, pet dander, mold spores, lint, fine dust, smoke particles, and some bacteria-sized particles for higher-level home air quality. Designed for furnace air, AC, heater, and house air return applications. Pleated electrostatically charged synthetic media captures more particles than flat fiberglass filters while maintaining low airflow resistance to support HVAC system efficiency. The reinforced moisture-resistant frame prevents filter collapse and air bypass over the filter's life. Compatible with most major brands including Carrier, Bryant, Trane, Lennox, Rheem, Goodman, York, Ruud, Honeywell, and Aprilaire furnace and air conditioner systems. Replace every 90 days under typical conditions, or every 30 days in homes with pets, smokers, or high dust levels for allergy and asthma relief. Made in USA.