Filtrete 20x25x4 Slim Fit Furnace Air Filter MPR 1550 (MERV 12) 2-Pack — Slim 3.75" High-Efficiency, Allergy Friendly

Filtrete 20x25x4 Slim Fit MPR 1550 furnace filter is a high-efficiency electrostatically charged HVAC filter that captures dust, pollen, pet dander and other airborne particles while fitting slim 3.75" housings.

If you want stronger particle capture than a standard pleated or washable screen, this Filtrete 2-pack provides enhanced filtration without complex installation. Each filter is sized for common furnaces and air handlers (actual size 19.50 x 24.50 x 3.75) and uses Filtrete’s electrostatic 3-in-1 media to attract and hold microscopic and visible particles as air cycles through your system. The MPR 1550 rating correlates with a MERV 12 performance tier, making it a solid choice when you need improved indoor air cleanliness while maintaining proper airflow in many residential systems.

How does this filter improve the air in my home?

The Filtrete MPR 1550 filter combines electrostatic charge and high-density pleats to trap a wide range of particles from the air passing through your furnace or air handler. That means more particles are intercepted during each heating or cooling cycle compared with non-electrostatic filters. It is third-party certified as asthma & allergy friendly, reflecting its effectiveness at reducing common household allergens.

• Captures lint, dust, pollen, and pet dander with electrostatic attraction.
• MPR 1550 / comparable to MERV 12 performance for small particle capture.
• Certified asthma & allergy-friendly for added confidence.
• Designed to maintain airflow suitable for many residential HVAC units.

Will this slim 3.75" filter fit my AprilAire or Carrier system?

This filter is made to fit installations that accept a 4" nominal thickness with an actual depth of 3.75 inches, and it is compatible with many AprilAire and Carrier housings that accommodate slim-fit 4" filters. Always verify your equipment's maximum filter depth and the actual dimensions before purchasing. The listed actual dimensions are 19.50 x 24.50 x 3.75 inches.

• Actual size: 19.50 x 24.50 x 3.75 inches for accurate fitting.
• Designed for slim 4" housings used by AprilAire, Carrier, and similar units.
• Verify your system’s filter slot depth and airflow specs before installation.

How often should I replace the Filtrete MPR 1550 filter and how do I track it?

Filter life varies by home conditions, but Filtrete recommends checking this 4" filter periodically and replacing it at least once every 12 months for optimal performance. Homes with pets, heavy dust, or allergy concerns may need more frequent changes. To simplify reminders, use the Filtrete Smart App to schedule replacement intervals of 90, 180, or 365 days.

• Replace at least once every 12 months under normal conditions.
• Consider more frequent changes in homes with pets, smokers, or high dust.
• Use Filtrete Smart App to set filter-change reminders.

What environmental and safety credentials does this product have?

Filtrete verifies that this furnace filter contains at least 50% recycled content via a third-party audit from GreenCircle Certified. The product is also part of Filtrete’s most-trusted residential HVAC filter lineup, backed by consumer research. These factors help you select a filter with both performance and environmental considerations in mind.

• Verified minimum 50% recycled content by GreenCircle Certified.
• Part of Filtrete’s trusted residential filter range.
• Certified asthma & allergy-friendly by an independent program.

Who is this for: The Filtrete 20x25x4 MPR 1550 filter suits homeowners and renters who want stronger particle capture than standard pleated or washable filters, need a slim 4" (3.75" actual) option for AprilAire or Carrier housings, and prefer a product with verified recycled content and allergy-friendly certification. It’s a practical pick for people with pets, seasonal allergies, or households aiming to reduce airborne dust and dander while preserving residential HVAC performance.