Aerostar pleated air filter 13 x 21-1/2 x 1 (box of 4)
Pleated furnace filter designed to capture microscopic particles. Improves air quality and fits in small furnaces; some customers report exact sizing issues
Highlights
- MERV 11-equivalent filtration
- designed for microscopic particles
- box of 4 for multiple replacements
Pros
- Effective filtration of small particles
- Improves air quality
- Easy to install
- Fits in compact furnace spaces
Cons
- Sizing may vary from advertised dimensions
Best For
Features
- Nominal size 13 x 21-1/2 x 1 inch for standard compatibility
- Per the product, size 12 7/8 x 21-1/2 x 3/4 inch; corresponds to 13 x 21 1/2 x 1
- Designed for AC furnace filtration to capture small particles
- Comparable performance to MPR 1000–1200 Micro Allergen Defense and Honeywell Allergen Plus FPR 7
- Filters microscopic particles such as lint, dust mites, spores, pollen, and pet dander
