Filterbuy 21x21.5x5 MERV 11 air filter (4-pack) 20x21.09x4.97
Pleated HVAC furnace filters with MERV 11 for allergen control and airflow. Customers note good value and easy installation, though some report sizing and durability concerns
Highlights
- MERV 11 filtration
- Actual size around 20.00 x 21.09 x 4.97
- 4-pack replacement filters
Pros
- MERV 11 filtration for allergens
- Easy to install
- Good value for money
- Fits furnace/air conditioner systems
Cons
- Mixed reviews on size accuracy
- Flimsy construction reported during installation
- Potential damage during handling
Best For
Features
- WHOLE HOUSE REPLACEMENT 21x21. 5x5 air filters for your furnace
- air conditioner
- or heat pump enhance HVAC system efficiency and support a healthy lifestyle (actual size 20. 00" x 21. 09" x 4. 97")
- MERV 11 PERFORMANCE Protect your home or business from allergens
- pets
- and more with MERV 11 synthetic media (comparable with MPR 1200 & FPR 7) that captures 95% of dust without restricting air flow
- LASTING FILTRATION Electrostatically charged media (made in the USA) with 8 pleats per foot traps more microscopic particles and lasts 3x longer than fiberglass models (replace every 90 days for best results)
- SUPERIOR CONSTRUCTION Easy installation beverage board (recyclable) frames with dual wire backing outperform basic cardboard designs by improving durability and resisting extreme temperatures
