Filter King 21x37x1 Air Filter (4-Pack) MERV 8
MERV 8 pleated air filters, 21" x 37" x 1" (actual 21" x 37" x .75"). Made in the USA. Helps capture particles and extend filter life; users note easy installation and good fit
Highlights
- made in usa
- 4-pack
- high particle capture with pleated design
Pros
- pleated MERV 8 filtration
- made in the USA
- easy installation
- extends filter life up to 90 days
- 4-pack for multiple filters
Cons
- size sometimes noted as too wide by some users
- mixed opinions on durability
Best For
Features
- MERV 8 rated pleated air filter in a 4-pack
- Actual size 21 x 37 x .75 inches (20 x 37 x 1) and 21 x 37 x 0.75
- Made in the United States with high-quality materials
- Designed for up to 90 days between replacements
- Recommended replacement interval 30–90 days for 1-inch filters
