Filter King 18x22x1 Air Filter 4-Pack - MERV 8 Pleated HVAC Filters

In this review the Filter King 18x22x1 Air Filter 4-Pack is assessed for homeowners and renters who want a straightforward, cost-effective way to improve indoor air quality. The bottom line: these made-in-USA pleated filters deliver reliable dust and particulate capture with a MERV 8 rating and a practical 30-90 day replacement window, making them a solid choice for routine maintenance of A/C and furnace systems. Expect an easy installation and noticeable reduction in airborne dust within a few days.

Key Features

• MERV 8 rating: Captures common airborne particles like dust and pollen while maintaining good airflow for residential HVAC systems.
• Pleated design: Provides increased surface area to trap more particles and extend the useful life of each filter compared with flat media.
• Made in USA: Fully manufactured domestically with documented EPA establishment information for consistent construction quality.
• 4-pack convenience: Supplies multiple replacement filters so users can maintain their system over several months without repeat orders.
• Recommended replacement window: Rated to last up to 90 days depending on conditions, offering flexibility between 30 and 90 day changes for typical homes.
• Simple installation: The open, slide and close design makes swapping filters fast and easy for most homeowners.

Who It's For

This 4-pack is ideal for homeowners, apartment dwellers, and landlords who need a dependable, budget-friendly filter that balances particle capture and airflow. It suits families without severe allergy needs who want to reduce dust, pet dander, and pollen with a MERV 8 level filter that still allows efficient HVAC performance.

Those requiring medical-grade filtration or higher allergen control should look for higher MERV ratings or HEPA solutions, while users who need custom or nonstandard sizes should verify actual dimensions before purchase because the listed nominal size differs slightly from the actual measurement.

Pros & Cons

Pros

• Good value: a 4-pack offers economical replacements compared with single-filter purchases.
• Effective at reducing dust and improving air quality within 48 hours for most homes.
• Made in USA construction provides consistency and quality control.
• Easy, tool-free installation that most people can complete in a minute or two.

Cons

• Actual size is 17.5 in x 21.5 in x 0.75 in, which may feel smaller than some nominal listings, so measure your filter slot first.
• Not intended for homes needing high-efficiency or medical-grade filtration solutions.

Specifications

Brand	Filter King
Rated Size	18 in x 22 in x 1 in
Actual Size	17.5 in x 21.5 in x 0.75 in
MERV Rating	MERV 8
Pack Quantity	4 pack
Country of Manufacture	Made in USA (EPA Establishment 103501-FL-1)
Recommended Replacement	30 to 90 days (up to 90 days max)

Our Verdict

For general residential use the Filter King 18x22x1 4-Pack is a sensible, economical choice that balances particle capture and airflow. It is particularly good for routine maintenance in homes without severe allergy requirements, offering easy installation and dependable made-in-USA construction that provides strong value over time.

Frequently Asked Questions

What is the actual size of these filters?
The filters measure 17.5 in x 21.5 in x 0.75 in actual size, while the nominal size is listed as 18 in x 22 in x 1 in.

How often should these be changed?
Filter King recommends changing 1 in filters every 30 to 90 days depending on household conditions; they can last up to 90 days in lower-dust environments.

Will a MERV 8 reduce airflow?
MERV 8 is designed to capture common particles without significantly impacting airflow in typical residential HVAC systems.