Aerostar Filter 20x20x4 MERV 11， 19 1/2 x 19 1/2 x 3 3/4 ， Box of 2

Size: 20 x 20 x 4

Model Number: 20x20x4

Designed for Superior Filtration Efficiency

Made with electrostatically charged synthetic material that draws and captures allergens including lint， dust mites， mold spores， pollen， pet dander， and dust.

Improve Indoor Air Quality

Protect your family and loved ones with clean indoor air quality at home. Aerostar filters are a simple and cost effective step towards a healthier home environment， free of airborne allergens and particles that can trigger various allergy and asthma symptoms.

Improve Efficiency and Reduce Cost

An Aerostar furnace air filter helps keep your HVAC unit working efficiently by removing dirt and reducing strain on the motor. When your unit runs properly， it consumes less energy， requires less maintenance and will have a longer life. These factors will have an impact on your utility bill and maintenance costs. It is recommended that you change the filter every 60 to 90 days during normal times of year but increase frequency to 30 days during peak summer and winter months when your unit is working the hardest.

About Aerostar Furnace Air Filters

Aerostar filters are manufactured in the USA by Filtration Group， a world-leading manufacturer and supplier of filtration solutions for residential， commercial and industrial applications. The Aerostar brand is known for constantly innovating and improving their technology to help make filtration more efficient， effective and environmentally friendly every day.

What’s in the Box

Box of two Aerostar Furnace Air Filters.

• Nominal: 20 x 20 x 4 Size: 19 1/2″x19 1/2″x3 3/4″ 20x20x4， AC Furnace Air Filter
• Replaces Honeywell Part Numbers: F25， 203721， F35， F35R， FC35A1019， F100， F150， FC100A1011， F200， FC200E1011， F50A1124， F50A1165， F50E1026， F50E1182， F50E6124， F50E6165， F50E8021， F50E8062， F50F1107， F50F1040， F55A1244， F55A1426， F55A1459， F55F1029， F55F1052， F58A1050， F58F1026， F300E1027
• Comparable to 3M Filtrete MPR 1000 to 1200 Micro Allergen Defense
• Comparable to Honeywell Allergen Plus FPR 7
• Fights lint， dust， dust mites， mold spores， pollen， pet dander， and smoke.