Is MERV 11 good enough for allergies?

MERV 11 captures most pollen, dust, mold spores and pet dander, which covers the main household allergens. If you need smoke or very fine particle removal, a MERV 13 filter is the stronger choice.

Will a MERV 11 filter strain my HVAC system?

MERV 11 is moderately restrictive. Most residential systems handle it, but older or undersized blowers may lose airflow. Check your system's filter rating before stepping up from MERV 8.

How often should I change it?

Every 2 to 3 months is typical for a MERV 11 filter. Homes with pets, heavy dust or constant fan use may need changes closer to every 60 days.

Does 24x30x2 mean the exact size?

Filter sizes are nominal. The actual dimensions are usually about 1/2 inch smaller in each direction, so measure your grille before ordering.

What is in the 4-pack?

Four identical 24x30x2 pleated MERV 11 filters. Nothing else is included.

How does it compare with a MERV 13 filter?

MERV 13 catches finer particles, including smoke and some airborne viruses, but restricts airflow more. MERV 11 is the middle ground for allergy relief without heavy airflow loss.

FilterWarehouseUSA

UltraPURE 24x30x2 MERV 11 HVAC Air Filter (4 Pack)

Best price now

$69.00at WalmartChecked 6 h ago

Prices are checked against each store and labelled with when.

Visit Walmart

FilterWarehouseUSA

UltraPURE 24x30x2 MERV 11 HVAC Air Filter (4 Pack)

Best price now

$69.00at WalmartChecked 6 h ago

Prices are checked against each store and labelled with when.

Visit Walmart

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Price facts

Lowest price today: $69.00 at Walmart (checked Nov 15, 2026).

Our take on the UltraPURE 24x30x2 MERV 11 HVAC Air Filter (4 Pack)

The UltraPURE 24x30x2 is a pleated HVAC filter with MERV 11 synthetic media, sold in a 4-pack. It targets particles in the 1–10 micron range: pollen, dust, dust mites, mold spores and pet dander. MERV 11 sits a step above common MERV 8 filters on fine-particle capture, but below MERV 13, which also catches finer smoke and virus-carrier particles at the cost of more airflow resistance. It suits homeowners with allergies or pets who want better filtration without the pressure drop of a high-MERV filter.

Best forAllergy sufferers wanting better than basic filtrationHouseholds with pets or heavy dustStandard 24x30x2 filter grilles and returnsBuying filters in bulk for a year of changes

Pros

MERV 11 captures fine particles MERV 8 filters miss
Pleated synthetic media holds its shape and resists moisture
Captures pet dander, pollen, spores and dust mites
4-pack covers several filter changes
Standard 24x30x2 size fits common return grilles

Cons

More airflow resistance than a MERV 8 filter
Not rated for the finest smoke or virus particles like MERV 13
No published pressure-drop or airflow figures
No frame or media details beyond the nominal size

UltraPURE 24x30x2 MERV 11 HVAC Air Filter (4 Pack) prices at every store

WalmartNew
In stockSold by FilterwarehouseUSAReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.
$69.00Free shippingChecked 6 h ago
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UltraPURE 24x30x2 MERV 11 HVAC Air Filter (4 Pack) price history

Lowest price we've seen: $69.00 on Nov 15 at Walmart. Tracked across 1 store since Nov 15.

About the UltraPURE 24x30x2 MERV 11 HVAC Air Filter (4 Pack)

The UltraPURE MERV 11 HVAC air filter is a pleated filter made with synthetic media. It captures allergens, dust mites, spores, pollen, dust and pet dander in the 1 to 10 micron range.

This listing is a 4 pack of 24x30x2 filters.

Size: 24x30x2
MERV rating: 11
Filter type: Pleated, synthetic media
Particle range: 1 to 10 microns
Captures: Allergens, dust mites, spores, pollen, dust, pet dander
Quantity: 4 filters

Specifications

size: 24x30x2Source
Brand: FilterWarehouseUSA
Microparticle performance rating: 11
Thickness: 2 in
Material: Synthetic
Count: 1
Product net content parent: 4
Has written warranty: No

Questions and answers

Is MERV 11 good enough for allergies?: MERV 11 captures most pollen, dust, mold spores and pet dander, which covers the main household allergens. If you need smoke or very fine particle removal, a MERV 13 filter is the stronger choice.
Will a MERV 11 filter strain my HVAC system?: MERV 11 is moderately restrictive. Most residential systems handle it, but older or undersized blowers may lose airflow. Check your system's filter rating before stepping up from MERV 8.
How often should I change it?: Every 2 to 3 months is typical for a MERV 11 filter. Homes with pets, heavy dust or constant fan use may need changes closer to every 60 days.
Does 24x30x2 mean the exact size?: Filter sizes are nominal. The actual dimensions are usually about 1/2 inch smaller in each direction, so measure your grille before ordering.
What is in the 4-pack?: Four identical 24x30x2 pleated MERV 11 filters. Nothing else is included.
How does it compare with a MERV 13 filter?: MERV 13 catches finer particles, including smoke and some airborne viruses, but restricts airflow more. MERV 11 is the middle ground for allergy relief without heavy airflow loss.
Where is the UltraPURE 24x30x2 MERV 11 HVAC Air Filter (4 Pack) cheapest?: At Walmart, for $69.00, as of our latest check.