Key Specifications
Prime Delivery • 30-Day ReturnsFiltrete 20x25x4 AC Furnace Air Filter, MPR 1550, MERV 12, Fits Honeywell & AprilAire Space-Gard, CERTIFIED Asthma & Allergy Friendly, Electrostatic Filter, 2-Pack (Actual Size 19.88x24.63x4.31 in)
The Filtrete 20x25x4 MPR 1550 (MERV 12) filter is a pleated, electrostatic furnace/AC replacement media designed for medium–high particulate capture in residential systems. It’s supplied as a two-pack and sized to fit many Honeywell and Aprilaire Space-Gard media air cleaners. Filtrete positions this filter to improve indoor air quality for allergy and asthma sufferers while balancing filtration with HVAC compatibility. The listing highlights the filter’s MPR 1550 rating (a Filtrete metric roughly aligned with MERV 12 performance), certified asthma & allergy friendliness, and the manufacturer’s suggested long service interval.
Key Features
The Filtrete 20x25x4 MPR 1550 (MERV 12) filter is a pleated, electrostatic furnace/AC replacement media designed for medium–high particulate capture in residential systems. It’s supplied as a two-pack and sized to fit many Honeywell and Aprilaire Space-Gard media air cleaners. Filtrete positions this filter to improve indoor air quality for allergy and asthma sufferers while balancing filtration with HVAC compatibility. The listing highlights the filter’s MPR 1550 rating (a Filtrete metric roughly aligned with MERV 12 performance), certified asthma & allergy friendliness, and the manufacturer’s suggested long service interval.
Available Styles & Variants
Key Considerations
Filtration efficiency (MERV vs MPR) — Understand capture ratings and particle size ranges. MERV (industry standard) and MPR (3M/Filtrete’s scale) both indicate how well a filter removes particles; higher numbers = smaller particles captured but usually higher airflow resistance.
Airflow resistance (pressure drop) — Higher efficiency filters often restrict airflow more. Excessive pressure drop can reduce HVAC efficiency and may shorten equipment life. Choose a filter that your system can handle without creating large pressure losses.
Filter media & technology (mechanical vs electrostatic) — Mechanical filters trap particles via fiber structure; electrostatic filters add an electric charge to improve capture of fine particles without dramatically increasing media density. Over time electrostatic charge can diminish.
Physical fit & dimensions — A correct actual size (not just nominal) is essential. Gaps or wrong thickness let unfiltered air bypass the filter.
Certification & target use (allergy, asthma) — Certifications from trusted bodies (e.g., “Asthma & Allergy Friendly”) indicate independent testing for specific claims; useful when someone in the household has respiratory issues.
Service life and maintenance — How often the manufacturer recommends changing the filter (and how that aligns with your home’s dust/pet/allergen load). Changing too infrequently reduces IAQ; changing too often increases cost.
MERV (Minimum Efficiency Reporting Value) is an industry rating that indicates how well a filter captures particles in different size ranges (1.0–10+ µm and smaller). Filtrete’s MPR is an alternate scale focused on capture of sub-micron particles. A filter rated MPR 1550 / MERV 12 sits in the medium-high efficiency band — effective at reducing dust, pollen, pet dander, and many smaller particles, but it won’t capture the smallest viral aerosols as HEPA filters do. Higher efficiency improves indoor air quality but can increase resistance, so match rating to needs (allergies vs energy efficiency).
These factors represent the most critical aspects that will impact your satisfaction with this product.
Customer Reviews
These Filtrete MPR 1550 filters work extremely well in my HVAC system. The air in my home feels noticeably cleaner, and they trap dust, allergens, and pet dander much better than the cheaper filters I used before. They fit perfectly in my Lennox unit, and the 2-pack is a great value for the quality you get. Highly recommend if you want strong filtration without overpaying.
Better price that at the large retail locations all around me. Great product!