Filtrete 10x20x1 AC Furnace Filter – MERV 11, MPR 1000, Micro Allergen Defense, 4 Pack (Actual Size 9.81 x 19.81 x 0.81 in)

Sharper Indoor Air Starts Here

The Filtrete 10x20x1 AC Furnace Filter blends electrostatic media with a 3-in-1 design to pull in and trap a broad range of airborne particles as air moves through your heating and cooling setup. With a 1000 MPR rating paired with a MERV 11 efficiency, this filter targets daily dust, pollen, dust-mite debris, mold spores, pet dander, smoke, and other common indoor contaminants, helping your living spaces feel fresher after each pass.

The electrostatic design uses both positively and negatively charged fibers that act like tiny magnets to attract and capture particles. This magnetic action can help reduce the amount of debris that circulates in your home, potentially contributing to a cleaner air flow during busy family days or after activities that stir up dust.

Key benefits at a glance

• Electrostatic fibers attract particles for potentially improved filtration performance.
• 1000 MPR and MERV 11 work together to capture a wide range of microparticles and larger contaminants.
• 3-month pleated design balances filtration strength with a practical replacement cycle.
• Designed for use in furnaces, air conditioners, and other HVAC systems.
• 4-pack provides backup filters for multi-room setups or easy stock replacement.

What to expect in everyday use

In typical homes, this Filtrete filter supports cleaner air flows and helps reduce the buildup of dust and debris inside your HVAC. Results can vary based on room layout, occupancy, and environmental conditions, but many users notice a consistently refreshed feel in rooms that see heavy airflow.

Replace every 90 days as a baseline; adjustment may be beneficial in dusty environments or during peak seasons. The actual size is 9.81 x 19.81 x 0.81 inches, which may differ slightly from nominal sizing—double-check fit before installation to ensure a proper seal.

What’s in the box

• Pack of four Filtrete filters featuring Micro Allergen Reduction (1000 MPR).
• Pleated 1-inch design suitable for multiple HVAC configurations.

Filtrete is a trusted name in residential air filtration, backed by engineering from 3M. The 3-in-1 technology is designed to help capture a spectrum of airborne particles while supporting steady air flow through your heating and cooling system.