Filter King 35.5x7.5x1 Air Filter 4-Pack - MERV 8 Pleated Filters

In this review the Filter King 35.5x7.5x1 Air Filter 4-pack is evaluated for homeowners and renters who need an affordable, reliable replacement for a slim HVAC return slot. The bottom line: this set is best for people who want a balance of particle capture and airflow without frequent maintenance, since the MERV 8 rating provides noticeably cleaner air within days while still allowing good system performance. The reviewer found the pack convenient to install and appreciated that these are fully made in the USA.

Key Features

• MERV 8 filtration: Captures common airborne particles such as dust, pollen, and pet dander while maintaining adequate airflow for A/C and furnace systems.
• Pleated design: The pleats increase surface area to trap more contaminants and extend time between replacements compared with flat filters.
• Actual size accuracy: The listed actual size of 35.5 in x 7.5 in x.75 in helps ensure a near-perfect fit in slots sized for 1 in filters.
• Made in USA: Fully manufactured in the United States with EPA establishment identification, which some buyers prefer for quality control and sourcing transparency.
• Long service window: Rated to last up to 90 days depending on household conditions, allowing flexible replacement intervals between 30 and 90 days.
• Easy installation: Simple open, slide and close design means swapping filters takes only a minute for most homeowners.

Who It's For

This 4-pack is aimed at homeowners, renters, or small offices with a return grille sized for 1 in filters who want improved indoor air quality without upgrading to high-MERV options that can restrict airflow. It is ideal for households with allergies, pets, or visible dust where a MERV 8 filter will reduce common particulates quickly.

Those who need medical-grade filtration or live with severe respiratory conditions should look at higher MERV ratings or supplemental air purification, since MERV 8 is a moderate-performance option focused on balance rather than HEPA-level capture.

Pros & Cons

Pros

• Made in the USA, which gives confidence in consistent build and materials.
• Pleated MERV 8 media captures a wide range of household particles without noticeably reducing airflow.
• Accurate actual size and sturdy construction provide a consistent, snug fit.
• Simple installation and a 4-pack supply make regular changes convenient and economical.

Cons

• Not suitable for environments that require higher-efficiency or medical-grade filtration.
• The actual thickness is.75 in, which may be slightly thin for frames expecting a rigid full 1 in depth.

Specifications

Brand	Filter King
Pack size	4-pack
Nominal size	35.5 in x 7.5 in x 1 in
Actual size	35.5 in x 7.5 in x.75 in
MERV rating	MERV 8
Made	United States (EPA Establishment 103501-FL-1)
Recommended change interval	30-90 days

Our Verdict

The Filter King 35.5x7.5x1 4-pack is a practical choice for most homes that need better dust and allergen control without sacrificing system airflow. Its MERV 8 pleated media, accurate sizing, and U.S. manufacturing make it good value for routine replacement cycles, though those needing higher filtration should opt for a different product.

Frequently Asked Questions

How often should these filters be replaced?
Filter King recommends changing 1 in filters every 30-90 days; typical households find a 60-90 day interval works unless there are pets or heavy dust.

Will this restrict my A/C or furnace airflow?
With a MERV 8 rating and pleated design these filters are intended to trap particles without significantly impacting normal system airflow.

Are these filters actually made in the U.S.?
Yes, the product is fully manufactured in the United States and lists an EPA establishment number for traceability.