AprilAire 401 MERV 10 Replacement Filter, 16 × 25 × 6 in, 2-Pack

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Product guide

AprilAire 401 MERV 10 Replacement Filter, 16 × 25 × 6 in, 2-Pack

Pack: AprilAire 401 is a two-filter replacement set listed for the AprilAire and Space-Gard 2400 whole-house air purifiers. Its MERV 10 media is intended to capture particles such as dust, pollen, mold spores, and pet dander, with the manufacturer recommending annual replacement.

At a glance

Designed for AprilAire and Space-Gard 2400 air purifiers, according to the listing.
MERV 10 filtration is claimed to capture dust, pollen, mold spores, bacteria, and pet dander.
Manufacturer recommends replacing the filter annually and claims up to one year of filter life.
The separately sold 1413 upgrade kit changes the filter frame and supports different filter media.

Price

$63.99Save 20%

Reference price: ~~$79.99~~

Price checked: Nov 14, 2026

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Often bought together

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AprilAire 201 Replacement Filter for AprilAire or Space-Gard 2200 or 2250 Whole-House Air Purifiers - MERV 10, 20x25x6 Air Filter (Pack of 2)

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Pros and cons

Pros

Two filter media pieces are listed, so the pack provides replacements for more than one change.
Slide-in rectangular design is intended for the specified purifier model.
Manufacturer identifies multiple common airborne particles the filter is designed to capture.

Cons

MERV 10 is a lower filtration rating than the MERV 13 and MERV 16 media mentioned for the separately sold upgrade system.

Technical specifications

13 specifications

Identity and compatibility
Brand	Aprilaire
Model	401
Compatible air purifier	AprilAire 2400
MERV rating	10
Filter construction	Pleated
Shape	Rectangular
Mounting type	Slide In
Nominal size	16 x 25 x 6 inches

Dimensions and installation
Dimensions listed	7.47"L x 28"W x 17"Th
Weight listed	1.8 pounds

Materials and protection
Material listed	Bonded Glass Fiber
Compatible HVAC system	residential
Common application	Allergen Reduction

What to know before buying

Listing details to confirm

The listing is inconsistent about size: the title and filter-size claim give a nominal 16 x 25 x 6 inches, while the listed dimensions are 7.47"L x 28"W x 17"Th. Confirm the physical dimensions and fit for your purifier before ordering. Manufacturer recommends annual changes, while customer feedback describes replacement intervals of 4–6 months, so actual replacement timing may vary.

What’s in the box

Included

2 × 401 filter media

Who is it for?

A good fit for

Owners of an AprilAire or Space-Gard 2400 who need replacement filter media.
Buyers seeking a MERV 10 filter for a whole-house system and who are comfortable following their system's replacement guidance.

Less suited to

Owners of other purifier models unless compatibility is confirmed.
Buyers specifically seeking the MERV 13 or MERV 16 media offered with the separately sold 1413 upgrade kit.

AprilAire 401 MERV 10 Replacement Filter, 16 × 25 × 6 in, 2-Pack · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.6 / 5 · 4,374 ratings

5 stars82%82%
4 stars11%11%
3 stars3%3%
2 stars1%1%
1 star3%3%

Customer feedback commonly describes straightforward installation, a good fit, and reduced household dust, while some customers question the material's build quality and say it can tear during installation. For buyers replacing media in a 2400 system, reported fit and ease of changing are useful, but handle it carefully and consider the conflicting size details before purchase.

Positive themes

Customers report easy installation, good fit, and reduced dust in the home.

Negative themes

Some customers describe the filter as flimsy or cheaply made and report tearing during installation.

Mixed feedback

Reported replacement intervals vary, with the manufacturer recommending annual changes while customer feedback mentions replacement after 4–6 months.

Frequently asked questions

Which purifier is this filter listed for?

The listing identifies AprilAire Model 2400 and also describes it as compatible with the Space-Gard 2400. Confirm your unit model before purchasing.

What does MERV 10 mean for this filter?

The manufacturer states that the filter is MERV 10 and is designed to capture particles including dust, pollen, mold spores, bacteria, and pet dander. This is a manufacturer claim, not an independent performance result.

How often should the filter be replaced?

The manufacturer recommends annual replacement and claims up to one year of filter life. Customer feedback also reports 4–6 month replacement intervals, so follow your equipment and usage needs.

Are the listed dimensions consistent?

No. The title and nominal-size claim say 16 x 25 x 6 inches, but the separate dimensions field says 7.47"L x 28"W x 17"Th. Check the fit before ordering.