11x20-1/8x1 Exact Filters Pleated MERV 8 (12 pack)

Name: 11x20-1/8x1 Exact Filters Pleated MERV 8 (12 pack)
Brand: Exact Filters
SKU: 80055-01299 11 x 20 1/8 x 1 E
Price: 194.99 USD
Availability: InStock

$ 194.99

$ 16.25 item

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Confirmed Measurment

Final dimensions of 11 x 20 1/8 x 3/4 inches

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What is a MERV rating?

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Made-to-Order Exact Filters

These filters are made to order based on your measurements.
Please measure your existing filter before ordering — manufacturer labels are often inaccurate.

The product photo is for reference only. Actual sizes may vary.
We list the smallest dimension first on the label (this does not affect fit or performance).

Questions? Feel free to contact us — we’re happy to help!

Built to order in the precise 11 x 20-1/8 x 1″ dimension you need, this Exact Filters® air filter solves a problem standard catalogs can't — a true custom fit for systems that don't accept common filter sizes.

Even a quarter-inch of gap around a filter can allow a significant percentage of return air to bypass the media entirely, which is why the exact fit matters as much as the filter's efficiency rating.

A MERV 8 rating is the most common mid-efficiency specification and the one most HVAC manufacturers print in their owner's manuals as the recommended minimum for standard systems. It captures everyday dust, pollen, pet dander, and mold spores while keeping airflow resistance moderate — a sensible balance for buildings without specific air-quality concerns.

Specifications

Nominal size: 11 x 20-1/8 x 1″
Actual dimensions: 11 x 20-1/8 x 3/4″
Efficiency rating: MERV 8
Quantity: 12 filters per carton

This 11 x 20-1/8 x 1″ filter size is frequently ordered by homeowners with older systems, property managers handling mixed-vintage HVAC equipment, and facilities maintenance teams servicing buildings where no two return grilles seem to measure the same.

Features

Suitable for forced-air furnaces, central AC, heat pumps, and packaged HVAC systems
Sold as a 12-pack so you have a full year of replacements on hand
Cardboard frame with reinforced media for structural stability during handling and installation
Orientation arrow printed on the frame to ensure correct airflow direction at install

Same 11 x 20-1/8 x 1″ size, different efficiency rating

MERV 1-4Basic dust-stop

MERV 11Enhanced efficiency

MERV 13Highest efficiency

Need 11 x 20-1/8 x 2″ or another depth?

This size is available in other depths we don't stock online — reach out and our team will quote it for you, typically same business day.

Call 866-469-8556

Specifications

Nominal Size	11 x 20 1/8 x 1 inches
Actual Size	11 x 20 1/8 x 3/4 inches
MERV Rating	MERV 8
Filter Media	100% synthetic non-woven, proprietary media that can be recycled. Engineered with a gradient density composition that achieves it's MERV rating using the mechanical method of particle capture. Media does not rely on an electrostatic charge to capture particulate, since electrostatic charged filters dissipate over time.
Filter Support Grid	Expanded metal is continuously laminated on the air leaving side to provide pleat stability during operation. Pleat shape is maintained allowing full media utilization which improves dust holding capacity.
Frame	Heavy-duty, two piece, moisture-resistant frame with diagonal support members. Frame is bonded to the media at all points of contact for unsurpassed frame strength. Interlocking corners and positive media-to-frame seal reduce the possibility of air bypass.
Removes	MERV 8 rating reduces up to 75% of large airborne particles including dust and lint, dust mite debris, pollen, pet dander, mold spores, bacteria and virus carriers.
Life	Recommended 90 day changeout
Quantity	12 Filters
Part Number	M8 - 11 x 20 1/8 x 1 - E

MERV	Captures	Efficiency	Airflow Impact	Replace Every	Shop
MERV 1–4	Lint, dust, pollen, carpet fibers, some pet hair	Up to 20% of 3.0+ micron particles	Minimal — maximum airflow	1–3 months	Shop →
MERV 8	Adds mold spores, dust mite debris, pet dander, hair spray	Up to 75% of 3.0–10 micron particles	Low	1–3 months (1″), 6–12 months (4″+)	Shop →
MERV 10	Adds finer dust, most airborne household particles	Up to 85% of 1.0–3.0 micron particles	Low–moderate	1–3 months (1″), 6–12 months (4″+)	Shop →
MERV 11	Adds fine pet dander, auto emissions, some airborne bacteria carriers	Up to 90% of 1.0–3.0 micron particles	Moderate	2–3 months (1″), 6–12 months (4″+)	Shop →
MERV 13	Adds smoke particles, fine allergens, many virus carriers	Up to 90% of 1.0–3.0 micron, up to 75% of 0.3–1.0 micron	Higher — verify system compatibility	2–3 months (1″), 6–12 months (4″+)	Shop →

MERV	FPR (Home Depot)	MPR (3M Filtrete)	Performance Summary	Shop
MERV 1–4	FPR 1–3	MPR 100–200	Basic equipment protection. Minimal airflow resistance.	Shop →
MERV 8	FPR 5–6	MPR 600–800	Mold spores, dust mites, pet dander. Residential standard.	Shop →
MERV 10	FPR 7	MPR 1000–1200	Fine dust, hair spray, fabric fibers.	Shop →
MERV 11	FPR 8	MPR 1200–1500	Pet dander, fine allergens, auto emissions.	Shop →
MERV 13	FPR 10	MPR 1900–2200	Wildfire smoke, fine allergens, many virus carriers.	Shop →

11x20-1/8x1 Exact Filters Pleated MERV 8 (12 pack)

$ 194.99

Any questions?

Find answers to common questions on filters, sizing preferences, MERV ratings, order status updates, and more in our helpful FAQ page. Visit FAQ Page

General

How often should I replace my HVAC filter?

Most pleated filters should be changed every 90 days. However, households with pets, allergies, or heavy HVAC use may need to replace filters every 30–60 days. Commercial and industrial sites may require more frequent changes based on conditions.

Do you offer custom sizes?

Yes! If you need a filter with an exact size—down to the 1/8 inch—we can help. Visit our Custom Size Filters page to get started.

What if the filter doesn’t fit right?

We’ve got you covered with our Filter Fit Guarantee. If the size doesn’t fit your system as expected, reach out to our support team and we’ll make it right.

What makes you different from big box stores or other filter sites?

We’ve been online for nearly 20 years, and our team has over 50 years of combined HVAC experience. We sell American-made filters from trusted brands like AAF Flanders and Koch Filter—no cheap knockoffs or low-performance imports. We’re also a proud NAFA member, which means we’re committed to real air quality expertise and professional standards.

Do you sell the same filters used in commercial or government buildings?

Yes. In fact, we supply filters to schools, clinics, and government agencies nationwide. Many of our filters—especially MERV 10, 11, and 13—meet or exceed specifications for professional use. You’re getting professional-grade protection for your home.

Are your filters certified or tested?

Yes. Almost all of our filters meet or exceed ASHRAE standards and are manufactured under strict quality control. Many are used in hospitals, schools, and government facilities—so you can trust they perform as advertised.

How do I know what size filter I need?

Look for the size printed on your old filter or measure the filter slot in your system. We recommend rounding up to the nearest 1/8” for custom sizes. You can also visit our How to Measure Filters page for step-by-step help.

Do you offer bulk discounts or commercial pricing?

Absolutely. If you’re ordering for a business, property, or large facility, we’ll provide a quote and recommend the right products for your needs. Reach out to our Commercial Services team anytime.

What is MERV?

What is a MERV rating and why does it matter?

MERV (Minimum Efficiency Reporting Value) rates how well a filter captures airborne particles. The higher the MERV rating (typically 1–13 for residential use), the finer the particles it can trap—from dust and pollen to bacteria and smoke. We offer filters from MERV 1–13 to match your system’s needs and your air quality goals. Learn More

Will a higher MERV rating restrict airflow?

Filters with higher MERV ratings are denser and can reduce airflow in systems not designed for them. MERV 8–10 is a safe choice for most homes. For MERV 11 or 13, ensure your system can handle the increased resistance or contact our team—we’re happy to help you choose the right balance of efficiency and airflow.

Will using a high-MERV filter damage my HVAC system?

Not when matched properly. All of our filters are designed for low pressure drop and optimal airflow. If you’re unsure, contact us—we’ll help you choose a filter that your system can handle safely.

Do higher MERV filters improve indoor air quality?

Yes. Filters with higher MERV ratings (10–13) trap smaller and more harmful particles like mold spores, smoke, bacteria, and allergens. They’re ideal for families, people with asthma or sensitivities, and anyone wanting cleaner, healthier air inside.