Choosing the right filter for your air conditioner can improve indoor air quality and system efficiency. This guide highlights five reliable filters that balance filtration, fit, and value. Each option features common sizes, pleated construction, and multi-layer filtration to help capture dust, pollen, and micro-particles.
Summary of Selected Products
| Product | Brand | Size (Actual) | Filtration |
|---|---|---|---|
| Filtrete 20x25x1 AC Furnace Air Filter | Filtrete | 19.688 x 24.688 x 0.84 in | MERV 11, MPR 1000 |
| Filtrete 16x20x1 AC Furnace Air Filter | Filtrete | 15.69 x 19.69 x 0.81 in | MERV 5, MPR 300 |
| Simply 20x20x1 Air Filter | Simply | 19.75 x 19.75 x 0.75 in | MERV 8, MPR 600 |
| Aerostar 20x20x1 MERV 8 | Aerostar | 19 3/4 x 19 3/4 x 3/4 in | MERV 8 |
| Filtrete 20x20x1 AC Furnace Air Filter | Filtrete | 19.719 x 19.719 x 0.84 in | MERV 11, MPR 1000 |
Filtrete 20x25x1 MERV 11 Filter (2 Pack)
The Filtrete 20x25x1 filter uses 3-in-1 Filtrete technology to pull in and trap microscopic particles. With a 1000 MPR and a MERV 11 rating, it aims to capture a broad range of allergens and pollutants from household air. The product is sold as a 2-pack and is designed to fit standard 20x25x1 HVAC openings, contributing to a cleaner, fresher indoor environment.
Filtrete 16x20x1 MERV 5 Filter (6-Pack)
This 16x20x1 Filtrete filter is a 6-pack featuring MPR 300 and MERV 5 filtration. It uses Filtrete 3-in-1 technology to pull in and trap particles, supporting a cleaner airflow. The exact dimensions are slightly smaller than nominal, measuring 15.69 x 19.69 x 0.81 inches, which is important for proper fit in many HVAC systems.
Simply 20x20x1 Air Filter (6-Pack)
Simply’s 20x20x1 filters come in a 6-pack, designed to fit most HVAC brands with an actual size of 19.75 x 19.75 x 0.75 inches. They promise enhanced filtration of dust, mold, pollen, and pet dander, capturing up to 90% of airborne particles and supporting healthier indoor air. A higher pleated count offers increased filtration coverage.
Aerostar 20x20x1 MERV 8 (6 Count)
The Aerostar 20x20x1 filter is a cost-effective option with a nominal size of 20x20x1 and an actual size of 19 3/4″ x 19 3/4″ x 3/4″. It targets microscopic particles like lint and pollen. The filter is easy to install and recommended for changing every 60 to 90 days, with more frequent changes during peak seasonal use.
Filtrete 20x20x1 MERV 11 Filter (2 Pack)
This Filtrete 20x20x1 pair provides MERV 11 filtration with MPR 1000, designed to capture micro-particles and allergens from indoor air. The exact dimensions are 19.69 x 19.69 x 0.81 inches. The 2-pack is suitable for households seeking a balance between filtration efficiency and replacement frequency, contributing to a cleaner airflow through the HVAC system.
Buying Guide
Key considerations when choosing an air conditioner filter include filtration efficiency, fit and size accuracy, and replacement cadence. Filtration standards like MERV and MPR indicate how many particles a filter can capture, but higher efficiency may reduce airflow if the HVAC system isn’t sized for it. For most homes, filters with a MERV 8–11 balance filtration and airflow well.
Fit and nominal vs. actual size matter. Many filters advertise nominal sizes but actual dimensions can vary slightly; measuring your slot is essential to ensure a proper seal and optimal performance. Always verify the exact size before purchasing to avoid inefficient filtration or airflow restrictions.
Consider the replacement schedule. Pleated filters generally capture more particles than flat panels, but require more frequent changes, especially in high-usage or allergy-prone homes. Some bundles offer multi-pack options that reduce the frequency of shopping trips and ensure you always have a replacement ready.
Filtration goals vary by environment. For households with pets, allergy sufferers, or urban air exposure, higher MPR/MERV ratings can reduce dust and allergens more effectively. In drier climates or systems with sensitive airflow, moderate filtration levels help maintain a balance between air quality and system efficiency.
Material and sustainability also play a role. Look for filters that use durable pleated media and eco-friendly packaging if those factors matter to you. Finally, consider compatibility with your HVAC system’s design, as some systems prefer certain thicknesses or pleat counts for optimal airflow.