Furnace Filters
Best Furnace Filter for Pets (2026): 5 Models Side by Side
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For a home with pets, the Nordic Pure 16x25x1 leads: its MERV 12 pleated media comes in a 6-pack and fits air conditioners and furnaces. The Aerostar runner-up pairs MERV 11 with a 4-pack, while the Filtrete raises the rating to MERV 13 with a 1900 MPR.
Starting out? See the main guide: Best Furnace Air Filters
Top picks at a glance
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Best OverallNordic Pure 16x25x1 Pleated MERV 12 Air9.8 View on Amazon -
9.6 View on Amazon -
Also GreatFrigidaire 16x25x1 Air Filter9.5 View on Amazon -
Also GreatFiltrete 16x25x1 in. Air Filter9.4 View on Amazon -
Also GreatGlasfloss 16x25x1 Fiberglass Air Filters9.2 View on Amazon
Compare the specs
Ranked on pack size from each listing, plus how many buyers have rated it. A dash (—) means we could not confirm that figure from the listing.
| Pick | MERV rating | Pack size | Weight | Warranty |
|---|---|---|---|---|
| 1. Nordic Pure 16x25x1 Pleated MERV 12 Air | MERV 12 | 6-pack | — | — |
| 2. Aerostar Air Filter 16x25x1 MERV 11 AC | MERV 11 | 4-pack | — | — |
| 3. Frigidaire 16x25x1 Air Filter | MERV 8 | 6-pack | — | 90-day |
| 4. Filtrete 16x25x1 in. Air Filter | MERV 13 | — | — | — |
| 5. Glasfloss 16x25x1 Fiberglass Air Filters | — | 6-pack | — | — |
Nordic Pure 16x25x1 Pleated MERV 12 Air
Its MERV 12 pleated media comes in a 6-pack for 16x25x1 slots, with an equivalent MPR of 1500-1900.
- MERV rating: MERV 12
- Pack size: 6-pack
Good for
- Owners of homes with pets who change filters on a schedule
- Buyers who want six filters in one box
Skip it if
- You need a MERV rating above MERV 12
- Your slot takes a size other than 16x25x1
The electrostatically charged synthetic pleated media fits air conditioners and furnaces with a slide-in mount, and the actual size is 15.5 by 24.5 by 0.75 inches. Measure your old filter and compare it with the actual size before ordering.
Aerostar Air Filter 16x25x1 MERV 11 AC
Its MERV 11 pleated media traps up to 95% of airborne particles and comes in a 4-pack.
- MERV rating: MERV 11
- Pack size: 4-pack
Good for
- Buyers who want a MERV 11 filter for a furnace
- Buyers who want filters made in the USA
Skip it if
- You need a MERV rating above MERV 11
- Your slot takes a size other than 16x25x1
The electrostatically charged synthetic media sits in a beverage board frame with wire backing, and the pleated design gives more surface area for longer use. It fits standard 1-inch filter slots in residential and commercial systems, and the actual size is 15.75 by 24.75 by 0.75 inches. Replace it every 2 to 3 months.
Frigidaire 16x25x1 Air Filter
Its MERV 8 pleated media comes in a 6-pack with dual wire backing and a 90-day warranty.
- MERV rating: MERV 8
- Pack size: 6-pack
- 90-day warranty stated
Good for
- Buyers who want a MERV 8 filter for a furnace
- Buyers who want six filters in one box
Skip it if
- You need a MERV rating above MERV 8
- Your slot takes a size other than 16x25x1
The polypropylene pleated media uses dual wire backing, and the exact size is 15.81 by 24.81 by 0.81 inches. Replace it every 3 months for the stated performance, and the maker gives a limited 90-day warranty.
Filtrete 16x25x1 in. Air Filter
Its MERV 13 rating with a 1900 MPR pairs 3-in-1 technology with a 62% microparticle capture rate.
- MERV rating: MERV 13
Good for
- Buyers who want a MERV 13 filter for a furnace
- Owners who want phone reminders for filter changes
Skip it if
- You need a MERV rating above MERV 13
- Your slot takes a size other than 16x25x1
The electrostatic pleated media uses Filtrete 3-in-1 technology to pull in and trap microparticles sized 0.3 to 1.0. The Filtrete Smart App sets 30-, 60- or 90-day reminders, and the actual size is 15.62 by 24.62 by 0.78 inches. Change the filter at least once every 90 days for the stated performance.
Glasfloss 16x25x1 Fiberglass Air Filters
Its fiberglass panel media uses a double-strut design with 10% greater open area and no metal parts.
- Pack size: 6-pack
Good for
- Buyers who want a disposable filter with no metal parts
- Buyers who want six filters in one box
Skip it if
- You want a pleated filter media
- Your slot takes a size other than 16x25x1
The fiberglass media bonds to a heavy-duty craftboard frame that holds its shape from install to swap, and the double-strut design opens 10% greater open area. The actual size is 15-5/8 by 24-5/8 by 3/4 inches, slightly under the nominal size so it fits the slot without binding. When it is dirty, pull it out, bag it and throw it away.
How to choose
Match the size to your slot
All five picks here are 16x25x1 filters, but their actual sizes differ: 15.5 by 24.5 by 0.75 inches for the Nordic Pure, 15.75 by 24.75 by 0.75 inches for the Aerostar, 15.81 by 24.81 by 0.81 inches for the Frigidaire, 15.62 by 24.62 by 0.78 inches for the Filtrete, and 15-5/8 by 24-5/8 by 3/4 inches for the Glasfloss. Measure your slot or the old filter before ordering, and check the slide-in fit your system uses.
Read MERV and MPR together
MERV rates how fine a particle a filter captures, and MPR is Filtrete's own scale for microparticle capture. Here the Filtrete carries MERV 13 with a 1900 MPR, the Nordic Pure carries MERV 12 with an equivalent MPR of 1500-1900, the Aerostar carries MERV 11 with a 1200 MPR, and the Frigidaire carries MERV 8. The Glasfloss uses a fiberglass panel design with a double-strut frame and 10% greater open area. A higher rating traps finer particles, so compare the numbers side by side rather than judging by one alone.
Set a change schedule
The Aerostar gives 2 to 3 months between changes, the Frigidaire and the Filtrete each advise changing every 3 months or at least once every 90 days, and the Nordic Pure and Glasfloss come in 6-packs for repeat swaps. The Filtrete Smart App can set 30-, 60- or 90-day reminders, so pick a rhythm you will keep.
FAQ
What size filter fits a 16x25x1 slot?
All five picks here are 16x25x1 filters, but check the actual size: 15.5 by 24.5 by 0.75 inches for the Nordic Pure, 15.75 by 24.75 by 0.75 inches for the Aerostar, 15.81 by 24.81 by 0.81 inches for the Frigidaire, 15.62 by 24.62 by 0.78 inches for the Filtrete, and 15-5/8 by 24-5/8 by 3/4 inches for the Glasfloss.
When should I change a furnace filter?
The Aerostar gives 2 to 3 months between changes, and the Frigidaire and the Filtrete advise changing every 3 months or at least once every 90 days. The Filtrete Smart App sets 30-, 60- or 90-day reminders.
What does MERV 13 mean compared with MERV 8?
MERV rates the fineness of particles a filter captures, so a higher number means finer capture. The Filtrete carries MERV 13 with a 1900 MPR, while the Frigidaire carries MERV 8.
Which pick is disposable with no metal parts?
The Glasfloss: its fiberglass media bonds to a heavy-duty craftboard frame with no metal parts, and when it is dirty you pull it out, bag it and throw it away.
