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Filter King 18x21x1 Air Filter 3-Pack

Filter King ★ 3.9/5 · ItemOracle Score Mid-Range

$47 USD
Price subject to change
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Filter King 18x21x1 Air Filter | 3-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 17.5 x 20.5 x .75"

MERV 8 pleated air filters, 3-pack, sized 18"x21"x1" with actual 17.5"x20.5"x0.75". Made in USA; designed to capture more particles and extend filter life. One customer notes good airflow improvements

Highlights

  • Made in USA
  • 3-pack value
  • MERV 8 filtration

Pros

  • MERV 8 rated
  • 3-pack for multiple filters
  • Made in USA
  • Pleated design for better particle capture
  • Easy installation

Cons

  • Actual dimensions differ from nominal size
  • Mixed durability feedback
  • Foldability may be an issue for some

Best For

  • residential furnace filters
  • air conditioner air filtration
  • periodic replacement every 30-90 days
  • improve indoor air quality
  • replacement for 18x21x1 filters
  • works with A/C and heaters

Features

  • MERV 8 rating in a 3-pack for air filtration
  • Actual size 17.5 x 20.5 x 0.75 inches; nominal size 18 x 21 x 1
  • Made in the USA using high-quality materials and construction
  • Filters can last up to 90 days before replacement

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