Air Filter MERV 11 Box Fan HVAC 20x20x4 MERV 11

Aerostar ELECTROSTATIC box filter -Nominal: 20 x 20 x 4 -Size: 19 1/2"x19 1/2"x3 3/4" 20x20x4, AC -Furnace Air Filter -High Capacity -Comparable to 3M Filtrete MPR 1000 to 1200 -Micro Allergen Defense Bought these to make my box fan into a purifier. Easy-peasy clean freSh air for cheap. LAST LONG. Comparable to Honeywell Allergen Plus FPR 7 Fights lint, dust, dust mites, mold spores, pollen, pet dander, and smoke Perfect for converting your 20" box fan into an air purifier. This is much quieter with increased air flow over standard 20x20x1 filters and last much longer! Less restrictive so easier on your HVAC system or fan motor saving on maintenence than the standard 20x20x1 filters. MERV 11 (Minimum Efficiency Reporting Value) air filters offer superior filtration for all HVAC systems, capturing 95% of airborne particles as small as 1 micron. These include allergens like: -pet dander -pollen -mold spores -dust mites -smoke -smog - ideal for allergy sufferers and homes with pets. Compared to lower-rated filters like MERV 8 (which captures ~85% of larger particles), MERV 11 filters provide significantly better air quality. They are often comparable to MPR 1000–1200 and FPR 7 rating systems. MERV 11 Open-box, never used Patent 10,232,295 20x20x4 20x20x1 20x20x2 Corsi-Rosenthal Box CR Box

Condition

Open Box (never used)

Mounting Location

HVAC or Box Fan

Finish

Quality

Brand

Aerostar

Control Style

MERV 11

Voltage

Premium