Furnace Filters
Best 16x25x4 Washable Furnace Filter (2026): 4 Picks Compared
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For a washable furnace filter, the KEYINGXUAN model leads this list with a MERV 8 electrostatic design that washes and reuses. The UBeesize is the 16x25x4 model in this list, with a MERV 8 aluminum frame and a 5-year manufacturer warranty. The K&N and ZHIANZAN models are 16x25x1 washable options with MERV 8 filtration.
Starting out? See the main guide: Best Furnace Air Filters
Top picks at a glance
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Best OverallKEYINGXUAN 16x25x1 HVAC Furnace Air Filter9.8 View on Amazon -
Runner-UpUBeesize 16x25x4 Reusable Air Filter9.4 View on Amazon -
Also GreatK&N 16X25X1 HVAC Furnace Air Filter9.2 View on Amazon -
Also GreatZHIANZAN 16x25x1 HVAC Furnace Air Filter9.2 View on Amazon
Compare the specs
Ranked on 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 | Weight | Warranty |
|---|---|---|---|
| 1. KEYINGXUAN 16x25x1 HVAC Furnace Air Filter | MERV 8 | — | 3-month |
| 2. UBeesize 16x25x4 Reusable Air Filter | MERV 8 | — | 5-year |
| 3. K&N 16X25X1 HVAC Furnace Air Filter | MERV 8 | — | 26-year |
| 4. ZHIANZAN 16x25x1 HVAC Furnace Air Filter | MERV 8 | — | — |
KEYINGXUAN 16x25x1 HVAC Furnace Air Filter
Its 16x25x1 washable design pairs a MERV 8 electrostatic filter with foam sealing strips and a 3-month warranty.
- MERV rating: MERV 8
- 3-month warranty stated
Good for
- Buyers who want a washable 16x25x1 filter
- Buyers who want foam sealing strips included
Skip it if
- You want MERV above 8
- You want a warranty longer than 3 months
It fits 16x25x1 slots with an actual size of 15.5 by 24.65 by 0.82 inches, and slides into the furnace, HVAC or air conditioning system. The electrostatic filter is washable with water and a small amount of detergent, dries naturally and goes back in, with cleaning recommended every 3 to 6 months. Four foam sealing strips come in the box for a tight fit, with an instruction manual included. It carries a 3-month warranty.
UBeesize 16x25x4 Reusable Air Filter
Its 16x25x4 washable design pairs a MERV 8 electrostatic filter with an aluminum frame and a 5-year warranty.
- MERV rating: MERV 8
- 5-year warranty stated
Good for
- Buyers who want a washable 16x25x4 filter
- Buyers who want an aluminum frame
Skip it if
- You want a filter thinner than 4 inches
- You want a warranty longer than 5 years
It fits 16x25x4 slots with an actual size of 15.35 by 24.37 by 3.58 inches, in an aluminum frame made to resist deforming. The pleated electrostatic filter washes with water and a little detergent, dries naturally and goes back in, with cleaning recommended every 3 months. It works with a wide range of furnace, HVAC and AC systems and carries a 5-year manufacturer warranty.
K&N 16X25X1 HVAC Furnace Air Filter
Its 16x25x1 washable design pairs a MERV 8 pleated filter with a durable build and a 26-year warranty.
- MERV rating: MERV 8
- 26-year warranty stated
Good for
- Buyers who want a pleated washable filter
- Buyers who want a 26-year warranty
Skip it if
- You want MERV above 8
- You want a warranty longer than 26 years
It fits 16x25x1 slots with a pleated MERV 8 design that rinses and reinstalls for repeated use. The polyester build holds its shape and effectiveness through repeated cleanings, and airflow supports consistent temperature control. It fits standard HVAC systems directly and carries a 26-year warranty.
ZHIANZAN 16x25x1 HVAC Furnace Air Filter
Its 16x25x1 washable design pairs a MERV 8 filter with static electricity filtration and a slide-in fit.
- MERV rating: MERV 8
Good for
- Buyers who want a washable 16x25x1 filter
- Buyers who want static electricity filtration
Skip it if
- You want a filter thicker than 1 inch
- You want MERV above 8
It fits 16x25x1 slots with an actual size of 15.5 by 24.5 by 0.82 inches, and slides into the HVAC system in seconds. It cleans and reuses many times from top-quality materials, with excellent airflow for HVAC efficiency.
How to choose
Size first: 16x25x1 or 16x25x4
Size decides whether a filter fits your slot. The UBeesize is the 16x25x4 model in this list, with an actual size of 15.35 by 24.37 by 3.58 inches, while the KEYINGXUAN, K&N and ZHIANZAN models are 16x25x1. Measure your slot before ordering, since nominal sizes differ from actual sizes: the KEYINGXUAN measures 15.5 by 24.65 by 0.82 inches and the ZHIANZAN measures 15.5 by 24.5 by 0.82 inches.
MERV 8 and washable care
All four filters are MERV 8 and washable, so care decides between them. The KEYINGXUAN washes with water and a small amount of detergent and needs cleaning every 3 to 6 months, while the UBeesize washes with water and a little detergent and needs cleaning every 3 months. The K&N rinses and reinstalls, and the ZHIANZAN cleans and reuses many times. Wash on the schedule each maker gives, and reinstall the filter once it is dry.
Warranties compared
Warranties differ more than filtration here. The K&N carries a 26-year warranty, the UBeesize carries a 5-year manufacturer warranty, and the KEYINGXUAN carries a 3-month warranty. Compare the stated warranties of the K&N, UBeesize and KEYINGXUAN against how long you plan to reuse the filter, since all four share MERV 8 filtration.
FAQ
Which filter is 16x25x4?
The UBeesize is the 16x25x4 model, with an actual size of 15.35 by 24.37 by 3.58 inches. The KEYINGXUAN, K&N and ZHIANZAN models are 16x25x1.
Are these filters washable?
Yes. The KEYINGXUAN and UBeesize wash with water and detergent, the K&N rinses and reinstalls, and the ZHIANZAN cleans and reuses many times.
What warranties do these filters carry?
The K&N carries a 26-year warranty, the UBeesize carries a 5-year manufacturer warranty, and the KEYINGXUAN carries a 3-month warranty.
When should I clean these filters?
The KEYINGXUAN needs cleaning every 3 to 6 months, and the UBeesize needs cleaning every 3 months.
