Furnace Filters
Best 25x16x1 Furnace Filter (2026): Top 5 by the Specs
As an Amazon Associate we earn from qualifying purchases. Specs below come from each product's Amazon listing; we do not test products in person.
For this furnace filter size, the Simply pick leads this list: it offers MERV 11 filtration at MPR 1000 in a 6-pack with pleated construction. The Nordic Pure follows at MERV 12, while the Filtrete covers basic dust and lint at MERV 5.
Starting out? See the main guide: Best Furnace Air Filters
Top picks at a glance
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Best OverallSimply 16x25x1 Air Filter9.8 View on Amazon -
9.8 View on Amazon -
Also GreatFiltrete 16x25x1 Air Filter9.7 View on Amazon -
Also GreatAerostar Air Filter 16x25x1 MERV 8 AC9.7 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. Simply 16x25x1 Air Filter | MERV 11 | 6-pack | — | — |
| 2. Nordic Pure 16x25x1 Pleated MERV 12 Air | MERV 12 | 6-pack | — | — |
| 3. Filtrete 16x25x1 Air Filter | MERV 5 | — | — | — |
| 4. Aerostar Air Filter 16x25x1 MERV 8 AC | MERV 8 | 4-pack | — | — |
| 5. Glasfloss 16x25x1 Fiberglass Air Filters | — | — | — | — |
Simply 16x25x1 Air Filter
It pairs MERV 11 filtration at MPR 1000 with a 6-pack and pleated construction for standard 16x25x1 slots.
- MERV rating: MERV 11
- Pack size: 6-pack
Good for
- Buyers who want a 6-pack of MERV 11 filters
- Homeowners with a 16x25x1 filter slot
Skip it if
- You need a MERV rating above 11
- You want filtration lasting longer than 3 months
It measures 15.75 by 24.75 by 0.75 inches in actual size, against a nominal size of 16 by 25 by 1 inch. The construction is pleated, with a 24-point beverage board frame and hot-rolled steel wire mesh, in cardboard and paper. It lasts up to 3 months, and the box includes 6 filters and an installation guide.
Nordic Pure 16x25x1 Pleated MERV 12 Air
It steps up to MERV 12 in a 6-pack, equivalent to MPR 1500-1900, with electrostatically charged pleated media.
- MERV rating: MERV 12
- Pack size: 6-pack
Good for
- Buyers who want MERV 12 filtration in a 6-pack
- Homeowners who want a filter made in the USA
Skip it if
- You need a MERV rating above 12
- You want a pack larger than 6 filters
It measures 15.5 by 24.5 by 0.75 inches in actual size, against a nominal size of 16 by 25 by 1 inch. The media is electrostatically charged synthetic pleated media, and the filter is made in the USA. It works with air conditioners and furnaces, and it slides into the filter slot.
Filtrete 16x25x1 Air Filter
It offers basic dust and lint capture at MERV 5 and MPR 300, with app reminders for changes.
- MERV rating: MERV 5
Good for
- Buyers who want basic dust and lint filtration
- Homeowners who want app reminders for filter changes
Skip it if
- You need a MERV rating above 5
- You want a change interval longer than 90 days
It measures 15.69 by 24.69 by 0.81 inches in actual size, against a nominal size of 16 by 25 by 1 inch. The construction is pleated polypropylene, with Filtrete 3-in-1 technology, and the pack holds 6 filters. The Filtrete Smart App can set 30-, 60- or 90-day reminders, and the filter should be changed at least once every 90 days.
Aerostar Air Filter 16x25x1 MERV 8 AC
It pairs MERV 8 filtration at MPR 600 with a 4-pack and electrostatically charged pleated media.
- MERV rating: MERV 8
- Pack size: 4-pack
Good for
- Buyers who want MERV 8 filtration in a 4-pack
- Homeowners who want a filter made in the USA
Skip it if
- You need a MERV rating above 8
- You want a pack larger than 4 filters
It measures 15.75 by 24.75 by 0.75 inches in actual size, against a nominal size of 16 by 25 by 1 inch. The media is electrostatically charged pleated media, with a heavy-duty beverage board frame and moisture-resistant backing.
Glasfloss 16x25x1 Fiberglass Air Filters
It uses a double-strut fiberglass design with 10% greater open area and a heavy-duty craftboard frame.
Good for
- Buyers who want a disposable fiberglass filter
- Homeowners who want a filter with no metal parts
Skip it if
- You need a filter thicker than 3/4 inch
- You want more than 6 filters in a pack
It measures 15-5/8 by 24-5/8 by 3/4 inches in actual size, slightly under the 16x25x1 nominal size. The media is fiberglass, bonded to a heavy-duty craftboard frame with a double-strut design for 10% greater open area.
How to choose
Measure actual size, not nominal size
The Simply and Aerostar measure 15.75 by 24.75 by 0.75 inches, the Nordic Pure measures 15.5 by 24.5 by 0.75 inches, the Filtrete measures 15.69 by 24.69 by 0.81 inches, and the Glasfloss measures 15-5/8 by 24-5/8 by 3/4 inches. Measure your current filter and compare that figure with the actual size before buying, so the new filter fits the slot without binding.
Compare MERV and MPR ratings
MERV and MPR are two rating scales used for furnace filters, and a higher number sits higher on its scale. The Simply is MERV 11 and MPR 1000, the Nordic Pure is MERV 12 and equivalent to MPR 1500-1900, the Filtrete is MERV 5 and MPR 300, and the Aerostar is MERV 8 and MPR 600. Compare picks on the same scale, and use the rating together with the actual size and pack size when choosing.
Plan changes and pack size
All five picks slide into the filter slot, and the Simply guidance is to follow the airflow arrows when inserting a filter. Plan changes around the stated intervals: the Simply lasts up to 3 months, the Aerostar lasts 2 to 3 months, and the Filtrete should be changed at least once every 90 days. Pack size matters for spares: the Simply, Nordic Pure, Filtrete and Glasfloss come in 6-packs, while the Aerostar comes in a 4-pack.
FAQ
What size filter do I need for this search?
Check the nominal size your system takes, then compare it with the actual size. The Simply and Aerostar measure 15.75 by 24.75 by 0.75 inches, the Nordic Pure measures 15.5 by 24.5 by 0.75 inches, and the Filtrete measures 15.69 by 24.69 by 0.81 inches.
When should I change these filters?
The Simply lasts up to 3 months, the Aerostar lasts 2 to 3 months, and the Filtrete should be changed at least once every 90 days. The Filtrete Smart App can set 30-, 60- or 90-day reminders.
What do MERV and MPR ratings mean?
MERV and MPR are scales for filter ratings. In this list the Simply is MERV 11 and MPR 1000, the Nordic Pure is MERV 12 and equivalent to MPR 1500-1900, the Filtrete is MERV 5 and MPR 300, and the Aerostar is MERV 8 and MPR 600.
Are these filters made in the USA?
The Simply, Nordic Pure, Aerostar and Glasfloss are made in the USA.
