Choosing the best air conditioner air filter is essential for maintaining indoor air quality and improving the efficiency of your air conditioning unit. Below is a selection of top-rated replacement filters available on Amazon, featuring various sizes, materials, and filtration capabilities suited for window and room air conditioners. This guide will help you find the ideal air filter that fits your needs, whether you’re aiming to reduce dust, pollen, pet dander, or other airborne particles.
Product | Brand | Type | Size | Key Feature |
---|---|---|---|---|
WJ85X10173 Room Air Conditioner Filter Screen Replacement | Supplying Demand | Filter Screen | 12-7/8 x 7-3/8 in | Reduces airborne particles, fits specific models |
Room Air Conditioner Filter Replacement Cut-to-Fit | Wintcomfort | Electrostatic Polyester | 24 x 15 x 1/4 in | Traps dust, pollen, dander, cut to fit |
Extra Large Cuttable Foam Pad Pre Filter Roll | MADHOLLY | Foam Pad with Carbon | 15.7 x 59 in | Washable, reusable, longer lifespan |
Foam Filter Replacement | Duck | Polyurethane Foam | 24 x 15 x 1/4 in | Washable, reusable, custom cut |
MERV 8 Pleated HVAC Air Filters (6-Pack) | Aerostar | Pleated HVAC Filter | 20 x 20 x 1 in | Captures microscopic particles, easy install |
Content Navigation
- Supplying Demand WJ85X10173 Air Conditioner Filter Screen Replacement
- Wintcomfort Cut-to-Fit Room Air Conditioner Filter Replacement
- MADHOLLY Extra Large Cuttable Air Conditioner Foam Pad Filter Roll
- Duck Brand Replacement Air Conditioner Foam Filter
- Aerostar MERV 8 High Efficiency Pleated HVAC Air Filters 20x20x1
- Buying Guide for Air Conditioner Air Filters
Supplying Demand WJ85X10173 Air Conditioner Filter Screen Replacement

The Supplying Demand WJ85X10173 is a reliable replacement filter screen specifically designed to fit certain room air conditioner models. Measuring 12-7/8 by 7-3/8 inches, this filter serves as a barrier to reduce airborne particles passing through your AC unit, thus improving air quality.
Alternate part numbers include AP4538886, AH2577777, EA2577777, and PS2577777, expanding its compatibility with various appliances. The filter is white, simple to install, and made to fit specific room air conditioners, ensuring a snug replacement to maintain proper function.
Wintcomfort Cut-to-Fit Room Air Conditioner Filter Replacement

This Wintcomfort product offers a 24 x 15 x 1/4 inch electrostatic non-woven polyester fabric filter, which outperforms traditional foam materials in filtering efficiency. It is designed to capture dust, pollen, pet dander, and common air pollutants, enhancing air quality in your home.
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The filter’s cut-to-fit versatility means it can be trimmed to suit most window air conditioning units. The polyester fabric ensures durability and continued performance over multiple uses when maintained properly. This product emphasizes fresh and cleaner air for day-to-day comfort.
MADHOLLY Extra Large Cuttable Air Conditioner Foam Pad Filter Roll

The MADHOLLY filter offers an extra-large foam pad pre-filter roll measuring 15.7 x 59 inches, which is cuttable to fit various air conditioners and purifiers. This washable and reusable foam pad comes with a charcoal sheet that helps eliminate impurities such as pet hair, lint, smoke, and volatile organic compounds (VOCs).
At 5/16 inch thickness, it provides an effective barrier for large particles, enhancing your air filter’s lifespan by protecting the main filter from wear and clogging. This model supports a safer living environment particularly beneficial for households with children and pets.
Duck Brand Replacement Air Conditioner Foam Filter

The Duck Brand foam filter is made from polyurethane foam, designed to reduce dust and pollen in the air. Measuring 24 by 15 by 1/4 inches, it’s a versatile filter that can be cut down to size as needed to fit your particular air conditioning unit.
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This filter boasts washable and reusable properties, enabling multiple uses without sacrificing effectiveness. Its foam material ensures easy installation and maintenance, making it a practical option for improving indoor air purity.
Aerostar MERV 8 High Efficiency Pleated HVAC Air Filters 20x20x1

The Aerostar MERV 8 pleated filter is designed for HVAC, furnace, and air conditioner systems. Its actual size is approximately 19 3/4 by 19 3/4 by 3/4 inches, making it suitable for many standard filter slots.
This filter captures fine particles including dust, lint, mold spores, and allergy-causing pollen, supporting a healthier indoor environment. It features straightforward installation and is recommended for replacement every 60 to 90 days, with an increased frequency during peak seasons to maintain optimal filtration.
Buying Guide for Air Conditioner Air Filters
When selecting the best air conditioner air filter, several factors should be considered to ensure compatibility, effectiveness, and long-term satisfaction.
Filter Type and Material
- Foam Filters: Often washable and reusable, foam filters like those from Duck and MADHOLLY are versatile and good for trapping larger particles such as dust and pet hair.
- Electrostatic Polyester: Filters such as the Wintcomfort model use electrostatic properties for enhanced filtration efficiency, capturing finer particulates like pollen and dander.
- Pleated Filters: Aerostar offers MERV-rated pleated filters that trap microscopic particles, important for allergy sufferers or those needing higher air quality.
- Filter Screens: Basic filter screens like Supplying Demand’s models reduce airborne particle intake but may not filter smaller allergens effectively.
Size and Fit
Accurate fit is critical for optimal performance. Many filters come in standard sizes (e.g., 24 x 15 inches, 20 x 20 inches), but some are cut-to-fit options providing customization for irregular or uncommon dimensions. Always verify your air conditioner’s filter slot dimensions before purchase.
Filtration Efficiency and Ratings
- MERV Rating: The Minimum Efficiency Reporting Value indicates filter effectiveness. Higher ratings capture smaller particles but may require more frequent changes.
- Electrostatic Charging: Helps attract dust and allergens, improving cleaning efficiency without reducing airflow.
Maintenance and Longevity
Filters that are washable and reusable, like foam pads, can offer cost savings and sustainability benefits. Pleated disposable filters generally require timely replacement as recommended, typically every 1 to 3 months, according to seasonal use.
Health Considerations
If household members experience allergies, asthma, or respiratory sensitivities, filters with higher MERV ratings or specialized materials (electrostatic or charcoal-infused foam) are advisable for improved air purification.
Environmental Impact
Consider filters made with sustainable materials or recyclable components, such as the BNX TruFilter brand, which emphasizes manufacturing in EPA-registered, environmentally conscious facilities.
Choosing the appropriate air conditioner air filter requires balancing filtration efficiency, fit, maintenance preferences, and health needs. With the options reviewed here, you can find a replacement filter that enhances indoor air quality while maintaining your AC unit’s performance.