Filtrete 18x24x1 Air Filter MERV 11 (2-Pack) — MPR 1000, Captures Allergens & Pet Dander, 3-Month Life

Filtrete 18x24x1 MERV 11 (MPR 1000) is a two-pack of pleated 1-inch HVAC filters engineered to capture a wide range of airborne particles like pet dander, smoke, pollen and household dust while maintaining dependable airflow.

This pair of Filtrete filters from 3M combines pleated media and Filtrete 3-in-1 technology to trap both large and microscopic particles without overly restricting your heating or cooling system. Each filter is sized to fit standard 18 x 24 x 1 openings (actual 17.68 x 23.68 x 0.81 in), carries a MERV 11 classification and an MPR 1000 rating, and is intended for routine replacement every 90 days to sustain performance and indoor air quality.

How will these filters affect indoor air quality each season?

These Filtrete filters are designed to intercept a mix of visible debris and finer particulates that commonly circulate in homes. By capturing lint, pollen and pet dander as well as smaller particles like smoke and smog, they reduce the overall particle load moving through your HVAC system.

• Rated MPR 1000 for enhanced microparticle capture (0.3–1.0 microns).
• MERV 11 classification targets a range of household contaminants.
• Pleated construction increases media surface area for longer service life.
• Intended 90-day replacement to keep filtration consistent.

Will using these filters impact my furnace or AC performance?

Filtrete designs these 1-inch pleated filters to balance filtration and airflow, helping your system operate efficiently when filters are replaced on schedule. Properly fitted and changed every three months, they minimize strain on HVAC fans while still capturing many airborne particles.

• Low-profile 1" thickness fits most standard slots without modification.
• Pleated media reduces pressure drop compared with denser filters.
• Replacing every 90 days avoids buildup that can impede airflow.
• Works across furnaces, air conditioners and central HVAC systems.

How do I know when to replace these Filtrete filters?

Replace the filters at least every 90 days for consistent performance; more frequent changes may be needed in homes with pets, smokers, or high dust levels. You can also use the Filtrete Smart App to scan the barcode on the packaging and set 30-, 60- or 90-day reminders so you never miss a replacement.

• Factory barcode pairs with Filtrete Smart App for change reminders.
• Check visually: discolored or clogged pleats signal earlier replacement.
• Pets, allergies, or heavy pollution often require more frequent swaps.
• Follow HVAC manufacturer guidance along with filter recommendations.

What specific contaminants can these filters help reduce?

With MPR 1000 and MERV 11 performance, these filters capture an array of particles that commonly circulate in homes, from large allergens to many fine particulates. While not a medical device, they reduce dust, pollen, pet dander and many smoke and smog particles that contribute to visible and invisible household dirt.

• Large particles: lint, pet hair clumps and visible dust.
• Common allergens: pollen and some mold spores.
• Fine particulates: pet dander and many smoke or smog particles.
• Helps keep HVAC components cleaner by trapping debris before it settles.

Who is this for: Homeowners or renters who want stronger filtration than basic disposable filters without moving to bulky media models. This Filtrete 2-pack fits families with pets, seasonal allergies or anyone looking to reduce household dust and small airborne particles while maintaining reliable HVAC airflow. Choose this filter if you need a convenient, app-supported reminder system and a trusted brand with a track record in residential filtration.