Filter King 17.5x27.5x1 Air Filter 4-Pack - MERV 8 Pleated Filters

In this review of the Filter King 17.5x27.5x1 Air Filter 4-pack, the bottom line is simple: this set is aimed at homeowners who want a reliable, made-in-USA replacement that balances particle capture and airflow. The reviewer found the pleated MERV 8 media removes visible dust and reduces household dust within days while remaining easy to install. For anyone replacing 1 inch filters on a schedule, this pack offers a low-friction swap-in with consistent fit and known materials, making it a practical, economical choice.

Key Features

• MERV 8 rating: Provides moderate particle filtration that helps trap common airborne contaminants without significantly restricting airflow.
• Pleated design: The pleats increase surface area to capture more particles and extend filter life between changes.
• Actual size: Marked as 17.5 in x 27.5 in x 1 in with an actual depth of 0.75 in, offering a close fit for housings expecting that nominal size.
• Made in USA: Fully manufactured in the United States under EPA establishment 103501-FL-1, which reassures shoppers about origin and construction standards.
• Long service interval: Rated to last up to 90 days depending on conditions, so users can plan regular 30- to 90-day replacements for optimal system longevity.
• Simple installation: Open, slide and close design makes swapping filters quick and straightforward for most homeowners.

Who It's For

This filter pack is best for homeowners and renters with furnaces or A/C systems that accept 1 inch filters and who want a balance of filtration and airflow without upgrading to higher MERV levels. It suits routine maintenance schedules where filters are changed every 30 to 90 days and for people who prefer products manufactured domestically.

It is not ideal for environments that need hospital-grade filtration or high-MERV containment for smoke, heavy allergies, or industrial contaminants. Users who require exact fractional thickness beyond the listed 0.75 in clearance should verify fit because some customers reported slight width variance.

Pros & Cons

Pros

• Well-made pleated media that captures visible dust and reduces household particles within days.
• Easy, tool-free installation that most people can complete in minutes.
• Made in the USA construction gives confidence in materials and assembly.
• Good value for a 4-pack when planning regular 30- to 90-day changes.

Cons

• Actual thickness is 0.75 in which may be slightly different than some housings expect for a 1 in nominal filter; a few users noted fit issues with width.
• MERV 8 is moderate filtration and may not meet needs for severe allergy or smoke situations.

Specifications

Brand	Filter King
Nominal Size	17.5 in x 27.5 in x 1 in
Actual Size	17.5 in x 27.5 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	Every 30 - 90 days

Our Verdict

The Filter King 17.5x27.5x1 4-pack is a practical choice for routine home HVAC maintenance because it combines made in USA construction, an effective pleated design, and a MERV 8 rating that balances particle capture with airflow. For most homeowners wanting dependable dust reduction and an easy install, this pack is good value; those needing higher filtration or exact fractional sizing should consider alternatives.

Frequently Asked Questions

How often should these filters be changed?
Filter King recommends changing 1 inch filters every 30 to 90 days depending on use and conditions.

Will MERV 8 affect my HVAC airflow?
MERV 8 is designed to trap common airborne particles while maintaining airflow for typical home systems.

Are these filters manufactured in the United States?
Yes, these filters are fully manufactured in the USA and list EPA establishment number 103501-FL-1.