21x21x5 (20.75x20.75x4.38) MERV 13
Aftermarket Replacement For Ruud
$55.43
Accumulair Filter for Ruud
- Nominal Size 21" x 21" x 4 1/2" (Actual Size 20 3/4" x 20 3/4" x 4 3/8")
- Great for reducing air borne particles such as dust, pollen, mold spores, tobacco smoke, pet dander and particles that carry viruses.
- Superior frame strength utilizing double wall construction and die cut fingers.
- High efficiency filter media collects small dust particles before they can collect on your coils.
- Lasts up to 6 months!
- Negative health effects from indoor air pollutants such as mold, secondhand smoke and household cleaning products can be experienced soon after exposure or even years later. Because people spend up to 90% of their time indoors, the EPA has named Indoor Air Quality (IAQ) a top five environmental health risk. Change your home air filters at least every 3 months to keep the air in your home safe to breathe.
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- Type Whole House Filter
- Item# DPFU21X21X5M13=DRU
- Aftermarket Replacement For Ruud
- Size 21x21x5
- Actual 20.75x20.75x4.38
- MERV 8
- MERV 11
- Carbon Odor
APR vs MERV
APR
APR stands for Accumulair Performance Rating. This rating has been established by the manufacturer of the Accumulair Filters. This rating exists to demonstrate the different levels of efficiency throughout the Accumulair filter line. Generally speaking, the higher the APR, the better the filter performs in capturing small airborne particles. This rating system is an internal rating system and applies to Accumulair filters only.
MERV
MERV stands for Minimum Efficiency Reporting Value. It is a number from a test method designed by the American Society of Heating, Refrigerating, and Air Conditioning Engineers (ASHRAE). The number is intended to help people compare filters. Generally speaking, a higher MERV rating indicates better filter performance.
Performance Comparison
Merv 6Basic |
Merv 8Good |
Merv 11Better |
Merv 13Best |
|
|---|---|---|---|---|
Lint |
✓ | ✓ | ✓ | ✓ |
Dust Mites |
✓ | ✓ | ✓ | ✓ |
Mold Spores |
✓ | ✓ | ✓ | ✓ |
Pollen |
✓ | ✓ | ✓ | ✓ |
Pet Dander |
✓ | ✓ | ✓ | ✓ |
Fine Dust |
✓ | ✓ | ✓ | |
Auto Emmissions |
✓ | ✓ | ||
Smoke |
✓ | ✓ | ||
Very Fine Dust |
✓ | |||
Bacteria |
✓ |
