Filtrete 20x25x4 Slim Fit AC Furnace Filter | MPR 1550, MERV 12, 4-Pack

Overview

Filtrete 20x25x4 Slim Fit MPR 1550 Air Filter delivers a robust filtration solution for homes seeking cleaner air and steadier airflow. With exact dimensions of 19.5 x 24.5 x 3.75 inches, this four-pack is designed for convenient, year-long replacement in compatible furnaces and HVAC units.

What makes it different

Built with exclusive Filtrete 3-in-1 technology, this filter combines strong particle capture with steady airflow. The MPR 1550 rating paired with a MERV 12 rating reflects a balance between filtration power and ventilation, helping to trap a wide range of particles while keeping air moving efficiently.

In real-life terms, homes with pets, cooking emissions, or seasonal pollen can experience a noticeable difference in air feel. The pleated design creates a larger surface area for filtration, helping microparticles be drawn into the media while letting cleaner air pass through.

Key benefits at a glance

• High-efficiency filtration: captures up to 50% of small particles in the air (0.3 to 1 micron) as reported in testing data.
• Comprehensive particle coverage: traps dust, lint, and pollen alongside smaller particles for thorough air filtration.
• Premium build and sustainability: asthma and allergy-friendly certification and at least 50% recycled content per GreenCircle.
• Smart maintenance: Filtrete Smart App offers 90-, 180-, or 365-day reminders to replace your filter.

Fit, compatibility, and maintenance

Exact size is 19.5 in x 24.5 in x 3.75 in. This 4-pack is designed to fit HVAC systems calling for a 3.75-inch (or thicker) filter and is compatible with Lennox and Honeywell devices, as well as Aprilaire and Carrier media air cleaners.

For best performance, replace your filter at least once per year and confirm your system’s required filter size before installation. The four-pack format helps streamline replacements across the year and seasonal transitions.

Environmental and brand trust

Filtrete is recognized as North America’s most trusted HVAC filter brand in recent industry surveys. The product’s recycled content and responsible design align with sustainable filtration choices for your home.