Table of Contents

10 sections 14 min read

Quick answer

Our overall pick is the Filtrete 16x25x1 MERV 11 four-pack, which suits households with a standard 1-inch filter slot who want a multi-pack on hand. Choose the MERV 13 options if you want a higher listed rating in a 1-inch slot, the 4-inch Filtrete cabinet filters if your media air cleaner takes deeper filters, or the MERV 8 and MERV 5 six-packs for basic dust control.

If you are shopping for the best furnace air filters for your home, the right pick depends on your filter slot, how deep it is and which rating you want. This roundup covers 14 furnace and AC filters, from basic MERV 5 options to 4-inch media cabinet filters. For more on indoor air, visit our Indoor Air Quality section.

We compared manufacturer listings and specifications on Amazon, so each pick reflects what the listing states. We did not test these filters ourselves, and you should confirm fit against your system’s manual before ordering.

Quick picks

14 Best Furnace Air Filters for Home Use compared

# Product Best for Nominal size Rating Pack count
1 Filtrete 16x25x1 MERV 11 four-pack Best overall: MERV 11 four-pack in 16x25x1 16x25x1 MERV 11 / MPR 1000 4
2 Filtrete 16x25x1 MERV 13 MPR 1900 Higher MERV 13 rating in a 16x25x1 slot 16x25x1 MERV 13 / MPR 1900 2 per title (bullet says 1-pack)
3 Filtrete 20x25x1 MERV 11 two-pack MERV 11 two-pack in 20x25x1 size 20x25x1 MERV 11 / MPR 1000 2
4 Filtrete 20x25x1 MERV 13 MPR 1900 MERV 13 two-pack in 20x25x1 size 20x25x1 MERV 13 / MPR 1900 2
5 Aerostar 16x25x1 MERV 13 six-pack MERV 13 six-pack in 16x25x1 size 16x25x1 MERV 13 (MPR 1500-1900) 6
6 Filtrete 16x20x1 MERV 11 two-pack MERV 11 two-pack in 16x20x1 size 16x20x1 MERV 11 / MPR 1000 2
7 Filtrete 16x25x4 MERV 11 12-month Deep 4-inch pick for Honeywell or Lennox cabinets 16x25x4 MERV 11 / MPR 1000 2 per title (item count says 1)
8 Filtrete 20x25x4 MERV 12 12-month Deep 4-inch pick for Honeywell or AprilAire cabinets 20x25x4 MERV 12 / MPR 1550 2
9 Aerostar 20x20x1 MERV 8 six-pack Six-pack in square 20x20x1 size 20x20x1 MERV 8 / MPR 600 6
10 Amazon Basics 16x20x1 MERV 8 six-pack Amazon Basics option for 16x20x1 slots 16x20x1 MERV 8 6
11 Amazon Basics 20x25x1 MERV 8 six-pack Amazon Basics six-pack for 20x25x1 slots 20x25x1 MERV 8 6
12 Filtrete 16x25x1 MERV 5 six-pack Basic dust and lint pick, MERV 5 16x25x1 MERV 5 / MPR 300 6
13 Simply 14x25x1 MERV 8 six-pack Six-pack MERV 8 for 14x25x1 slots 14x25x1 MERV 8 / MPR 600 6
14 CoreCarbon 20x30x1 washable cut-to-fit Washable, cut-to-fit polyester media 20x30x1 pad (cut to fit) Not listed 1 pad

How we chose

We compared manufacturer listings and specifications on Amazon as of November 2026. This is a desk comparison. We did not test, install or measure any of these filters ourselves.

Our criteria were the nominal and actual dimensions stated in each listing, the MERV or MPR rating listed, the pack count, media depth (1-inch or 4-inch), and any compatibility or care details the listing provides. Where a listing’s title and specification fields disagreed, we noted the conflict or left the figure out.

Best for standard 1-inch slots with MERV 11 or 13

These filters are listed as 1-inch thick and carry a MERV 11 or MERV 13 rating.

1. Best overall: MERV 11 four-pack in 16x25x1: Filtrete 16x25x1 MERV 11 four-pack

Filtrete 16x25x1 pleated filter listed as MERV 11 with an MPR of 1000, sold as a four-pack. The listing describes it as a 3-month AC and furnace filter that uses Filtrete 3-in-1 technology to trap particles while letting air flow through. Actual size is 15.68 x 24.68 x 0.81 inches.

Best for: Households with a standard 1-inch 16×25 slot who want a MERV 11 filter and a multi-pack on hand.

2. Higher MERV 13 rating in a 16x25x1 slot: Filtrete 16x25x1 MERV 13 MPR 1900

2
Filtrete 16x25x1 MERV 13 MPR 1900

Filtrete 16x25x1 MERV 13 MPR 1900

Filtrete
View on Amazon.com
Pros & Cons

Pros

  • MERV 13 and MPR 1900 rating
  • Listed for allergens, bacteria and viruses
  • Listed as a 3-month filter

Cons

  • Title and bullets list the pack count differently (2 vs. 1-pack)
  • The listing does not mention compatibility with specific cabinet models

Filtrete 16x25x1 pleated filter listed as MERV 13 with an MPR of 1900. The listing says it is designed to help capture allergens, bacteria, viruses and air pollutants, and it is a 3-month AC and furnace filter. Actual size is 15.62 x 24.62 x 0.78 inches, and the title lists it as a two-pack.

Best for: Homes with a 1-inch 16×25 slot that want a MERV 13 rating.

3. MERV 11 two-pack in 20x25x1 size: Filtrete 20x25x1 MERV 11 two-pack

Filtrete 20x25x1 pleated filter listed as MERV 11 and MPR 1000, sold as a two-pack. The listing notes that it helps capture microparticles as well as dust, lint and other household allergens, and it describes the filter as a 3-month replacement. Actual size is 19.68 x 24.68 x 0.81 inches.

Best for: Households with a 20×25 1-inch slot that want MERV 11 in a two-pack.

4. MERV 13 two-pack in 20x25x1 size: Filtrete 20x25x1 MERV 13 MPR 1900

Filtrete 20x25x1 pleated filter listed as MERV 13 with an MPR of 1900, sold as a two-pack. The listing describes Filtrete 3-in-1 technology and says the filter helps capture allergens, bacteria, viruses and air pollutants. It is listed as a 3-month AC and furnace filter, with actual size 19.62 x 24.62 x 0.78 inches.

Best for: Homes with a 20×25 1-inch slot that want a MERV 13 rating in a two-pack.

5. MERV 13 six-pack in 16x25x1 size: Aerostar 16x25x1 MERV 13 six-pack

Aerostar 16x25x1 pleated filter listed as MERV 13, sold as a six-pack. Actual size is 15.75 x 24.75 x 0.75 inches. The listing describes premium synthetic pleated fibers, an electrostatic charge and a moisture-resistant beverage board frame, and lists uses including allergies, dust, pet dander and smoke.

Best for: Households with a 16×25 1-inch slot that want a MERV 13 rating in a six-pack.

6. MERV 11 two-pack in 16x20x1 size: Filtrete 16x20x1 MERV 11 two-pack

Filtrete 16x20x1 pleated filter listed as MERV 11 and MPR 1000 in a two-pack. Actual size is 15.68 x 19.68 x 0.81 inches. The listing describes Filtrete 3-in-1 technology, says it is certified asthma and allergy-friendly, and lists it as a 3-month filter.

Best for: Households with a 16×20 slot that want MERV 11 in a two-pack.

Best for 4-inch media air cleaner cabinets

These filters are listed at 4 inches deep and name specific media air cleaner brands.

7. Deep 4-inch pick for Honeywell or Lennox cabinets: Filtrete 16x25x4 MERV 11 12-month

Filtrete 4-inch deep media filter in a 16×25 nominal size, listed as MERV 11 and MPR 1000. Actual dimensions are 15.88 x 24.56 x 4.31 inches. The listing says it is designed to fit Honeywell and Lennox media air cleaners and is a 12-month filter.

Best for: Owners of Honeywell or Lennox media air cleaner cabinets who want a 12-month, 4-inch filter.

8. Deep 4-inch pick for Honeywell or AprilAire cabinets: Filtrete 20x25x4 MERV 12 12-month

Filtrete 4-inch deep media filter in a 20×25 nominal size, listed as MERV 12 and MPR 1550, sold as a two-pack. Actual dimensions are 19.88 x 24.63 x 4.31 inches. The listing says it is designed to fit Honeywell and AprilAire Space-Gard media air cleaners and is a 12-month filter.

Best for: Owners of Honeywell or AprilAire Space-Gard media cabinets with a 20×25 slot.

Best for everyday dust control at MERV 8 or lower

These filters are listed at MERV 8 or below and focus on dust, lint and pollen.

9. Six-pack in square 20x20x1 size: Aerostar 20x20x1 MERV 8 six-pack

Aerostar 20x20x1 pleated filter listed as MERV 8 with an MPR of 600, sold as a six-pack. Actual size is 19.75 x 19.75 x 0.75 inches. The listing describes electrostatically charged pleated media, a beverage board frame with moisture-resistant backing, and reinforced pleats, and says it fits Carrier, Bryant, Payne and Honeywell systems.

Best for: Households with a square 20×20 filter slot who want a six-pack of MERV 8 filters.

10. Amazon Basics option for 16x20x1 slots: Amazon Basics 16x20x1 MERV 8 six-pack

Amazon Basics 16x20x1 filter, actual size 15.75 x 19.75 x 0.75 inches, rated MERV 8 and sold as a six-pack. The listing describes an electrostatic design and a beverage board frame with wire mesh support. It advises selecting the nominal size that matches your current filter frame.

Best for: Readers with a 16×20 slot who want a six-pack of MERV 8 filters with a wire mesh support.

11. Amazon Basics six-pack for 20x25x1 slots: Amazon Basics 20x25x1 MERV 8 six-pack

Amazon Basics 20x25x1 filter, actual size 19.75 x 24.75 x 0.75 inches, rated MERV 8 and sold as a six-pack. The listing describes an electrostatic design that it says helps trap particles that can cause system wear and tear. It has a beverage board frame with wire mesh support and an airflow arrow for installation.

Best for: Owners of 20×25 1-inch slots who want a six-pack of MERV 8 filters for regular dust control.

12. Basic dust and lint pick, MERV 5: Filtrete 16x25x1 MERV 5 six-pack

Filtrete 16x25x1 pleated filter listed as MERV 5 with an MPR of 300, sold as a six-pack. The listing positions it for basic dust and lint and describes Filtrete 3-in-1 technology. It is a 3-month AC and furnace filter, with actual size 15.69 x 24.69 x 0.81 inches.

Best for: Households that mainly want dust and lint control in a 16×25 slot and are not seeking a higher rating.

13. Six-pack MERV 8 for 14x25x1 slots: Simply 14x25x1 MERV 8 six-pack

Simply 14x25x1 pleated filter listed as MERV 8 with an MPR of 600, sold as a six-pack. Actual size is 13.75 x 24.75 x 0.75 inches. The listing says it is comparable to Filtrete MPR 600 and Honeywell FPR 5 filters and describes a higher pleat count than most retail filters.

Best for: Households with a 14×25 slot that want a six-pack of MERV 8 filters.

Best for reusable, cut-to-fit media

This option is a washable pad that you trim to the size you need.

14. Washable, cut-to-fit polyester media: CoreCarbon 20x30x1 washable cut-to-fit

CoreCarbon polyester filter media sold as one 20 x 30 x 1 inch pad, actual 20 x 30 x 0.75 inches, which you cut to the size you need. The listing describes it as washable: rinse with low pressure water, let it dry and reinstall. It states UL 900 classified material and says it is made in the USA.

Best for: Readers who want a reusable filter they can trim to a custom size and rinse clean.

How to choose the best furnace air filters

Start with your slot. Check the size printed on your current filter frame and note whether your slot is a standard 1-inch slot or a deeper media cabinet. Several listings here say to match the nominal size to your current frame, and actual dimensions often differ slightly from the nominal size, so compare both before you buy. The EPA’s guide to air cleaners in the home is a useful starting point for how filters fit into a broader plan for indoor air.

Next, look at the rating. MERV is the common scale for furnace filters, and MPR is a rating system Filtrete uses on its own listings. Higher ratings generally aim to capture smaller particles, but a higher rating is not automatically right for every system. Check your furnace or air handler manual, and ask an HVAC technician before you move to a higher rating.

Consider pack count and replacement timing. Some of the best furnace air filters on this list are listed as 3-month filters, and the 4-inch Filtrete filters are listed as 12-month filters. Follow the manufacturer’s manual and the listing for replacement timing. If you are weighing a standalone unit alongside a furnace filter, read How Air Purifiers Work to see how the two differ.

If you are considering a washable option, read the care steps first. The CoreCarbon listing says to rinse with low pressure water and let the pad dry before reinstalling. The listing does not mention washing for the pleated filters in this roundup.

For broader background, read Indoor Air Quality Guide: The Basics and browse the Air Quality Basics category. Safety first: when you change a filter, follow your furnace manual for shutting the system down and for any electrical or heating equipment.

What to look for

  • Confirm the exact size printed on your filter frame and compare it with the listed actual dimensions.
  • Note the rating (MERV or MPR) and check that your system’s manual supports it.
  • Check depth: a standard 1-inch slot or a 4-inch media air cleaner cabinet.
  • Compare pack count and the listed replacement interval.
  • Read the care instructions if you want a washable filter.

FAQ

How do I find the right furnace filter size?

Check the size printed on your current filter’s frame, then compare it with the actual dimensions in the listing. Several listings here note that the actual size differs from the nominal size, so match the frame before you buy. If your slot is deeper, look for a media cabinet filter.

Is a higher MERV rating always better?

Not always. A higher rating aims to capture smaller particles, but your system may not be set up for every filter. Check your furnace manual and ask an HVAC professional before you change ratings.

Can I wash my furnace filter?

Only if the product says so. The CoreCarbon listing describes rinsing with low pressure water and drying before reinstalling. The pleated filters in this roundup are not described as washable in their listings.

How often should I replace a furnace filter?

Follow the replacement interval in the listing and your system’s manual. Several filters here are listed as 3-month filters, and the two 4-inch Filtrete filters are listed as 12-month filters.

References

  1. Amazon product listings and manufacturer specifications (accessed November 2026)
  2. EPA: Guide to Air Cleaners in the Home
  3. EPA: Indoor Air Quality