Filtrete 18x36x1 AC Furnace Filter – MERV 8, MPR 700, 4-Pack (Actual 17.81x35.81x0.65) | 3-Month Pleated Electrostatic Filter

Overview

Upgrade your comfort with the Filtrete 18x36x1 AC Furnace Filter. This 4-pack features 3-month pleated filters that use electrostatic media to attract and trap a broad range of common indoor particles. Designed to work with your heating and cooling system, these filters aim to keep indoor air fresh as air circulates from room to room, floor to ceiling.

The filtration technology blends a durable pleated design with electrostatic properties, helping to reduce visible dust buildup on surfaces while maintaining a steady airflow through your ducts. Each filter is sized to fit standard 18x36x1 openings, with an actual size of 17.81 x 35.81 x 0.65 inches, so you can count on a snug, unobtrusive fit in many HVAC slots.

What you get

• Four-pack of 3-month pleated air filters, sized for 18x36x1 openings (actual size noted above)
• Each filter features exclusive Filtrete 3-in-1 technology to trap unwanted air particles while allowing cleaner air to pass through

Why this Filtrete filter stands out

• MERV 8 / MPR 700 ratings indicate a higher-capacity particle capture compared with basic filters, including pollen, dust, and pet dander
• Electrostatic media helps attract and hold particles like lint, pollen, and dust as air cycles through
• Designed to outperform fiberglass, washable, and non-electrostatic 1-inch filters in typical furnace or HVAC applications
• Smart usage features include a barcode scan for the Filtrete Smart App to customize replacement timing

Usage and expectations

For optimal performance, replace the filter every 90 days. The Filtrete Smart App can help you set a replacement countdown by scanning the packaging barcode, sending a reminder when it’s time to refresh. While not a medical device, the filter is designed to help keep indoor air moving through your system with less resistance, potentially contributing to a more consistent airflow.

Real-world scenarios

Whether you’re dealing with seasonal pollen, pet shedding, dust from daily living, or general household pollutants, this filter aims to balance airflow with filtration. It fits into many standard HVAC setups, making routine maintenance simpler and more predictable for busy households, renters, and DIY enthusiasts alike.