Frost King Air Conditioner Filters 15 in x 24 in Pack of 2 - Washable

In this review the Frost King Air Conditioner Filters 15 in x 24 in (pack of 2) are evaluated for homeowners and renters who want a reusable, low-maintenance option to reduce dust and pollen in cooling units. The bottom line: this washable open cell foam filter is best for people seeking a simple, frameless replacement that lasts up to 36 months and can be rinsed rather than tossed. It is a practical, budget-friendly choice when seasonal allergen control and minimal upkeep are the priority.

Key Features

• Open cell foam construction: The polyurethane foam captures dust and pollen while allowing airflow, helping cooling performance stay steady.
• Washable and reusable: Because the filter is washable, it can be rinsed and returned to service instead of replaced monthly, saving money over time.
• Frameless design: The frameless, flexible material fits into many window and portable air conditioner slots where a rigid frame might not.
• Long service life: The manufacturer states the filter can last up to 36 months with proper care, reducing ongoing replacement costs.
• Allergy relief focus: The filter is designed to help remove common allergens such as dust and pollen, which can improve indoor comfort for allergy sufferers.

Who It's For

The Frost King washable foam filter is aimed at homeowners or renters who use window or portable air conditioners and prefer a reusable option to disposable pleated filters. It works well for those who want a straightforward, tool-free maintenance routine: rinse, dry, and reinstall. It is also appropriate for allergy-conscious households that need a basic level of particulate capture without impacting airflow.

People who need high-efficiency particulate filtration, such as those with severe respiratory conditions, or who require exact factory-fit rigid frames should look elsewhere. This foam filter is not a HEPA-grade solution and is best used as a general-purpose, washable filter rather than a medical-grade air cleaner.

Pros & Cons

Pros

• Reusable foam construction reduces waste and replacement frequency compared with disposable filters.
• Washable design makes cleaning simple and inexpensive over the product life.
• Frameless, flexible size fits many 15 in x 24 in air conditioner openings where rigid filters may not.
• Helps remove dust and pollen, offering practical allergy relief for average household needs.

Cons

• Not a HEPA or high-MERV filter, so it may not meet the needs of users requiring high-efficiency filtration.
• The frameless foam can be less rigid in some installations, which may require careful fitting to avoid gaps.

Specifications

Brand	Frost King
Manufacturer	THERMWELL
Manufacturer Part Number	F1524
Dimensions	15 in x 24 in x 1/4 in
Material	Open cell polyurethane foam
Pack Quantity	2 per pack
Usability	Washable and reusable; lasts up to 36 months

Our Verdict

The Frost King 15 in x 24 in washable foam filter is a sensible, economical choice for typical window and portable air conditioner users who want easy maintenance and basic allergy relief. Its washable, frameless polyurethane design offers good value for households that prioritize reusable filters and straightforward cleaning, though those needing high-efficiency filtration should choose a different product.

Frequently Asked Questions

How do you clean this filter?
Rinse the foam under running water until clear, allow it to fully dry, then reinstall; avoid harsh chemicals that could degrade the polyurethane.

How long will the filter last?
The manufacturer indicates the washable foam can last up to 36 months with proper care and regular cleaning.

Will it fit my air conditioner?
It is sized for openings measuring 15 in x 24 in x 1/4 in and the frameless foam is flexible to fit many window and portable units, but verify your unit's slot dimensions before buying.