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Blue and white air filter with MERV 10 label on a white background

12x24x4 Air Filters

Actual: 11.375x23.375x3.75 inches
Made in the USA • Ships within 48 hours • Free Shipping
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Shop replacement air filters available in MERV 10, MERV 11, MERV 13, and Odor Block options. Designed for reliable performance and proper fit, these filters help capture dust, pollen, pet dander, and other airborne contaminants while supporting efficient HVAC operation.

Filters are stocked and shipped from our Clearwater, FL warehouse. Choose your preferred filtration level, order the quantity you need, and save more with volume pricing on larger orders.

Filter Details

Product specifications and sizing information.

Nominal Size: 12x24x4

Actual Size: 11.375x23.375x3.75 inches

Manufactured in the USA using high quality filtration media and durable beverage board frames.

Not sure if this is the right size? Browse our 1 inch air filters, 2 inch air filters, or 4 inch air filters to compare common residential filter sizes.

MERV Rating Guide

Learn what MERV ratings mean and choose the right level of filtration for your home.

In simple terms, the higher the MERV rating, the smaller the particles the filter can trap. Higher MERV filters can help improve indoor air quality by capturing more dust, allergens, and microscopic particles moving through your HVAC system.

Choosing the right MERV rating depends on your home, allergies, pets, air quality concerns, and HVAC system compatibility.

For a deeper breakdown, read our MERV rating guide to compare MERV, MPR, and APR air filter ratings.

MERV 10

Great for everyday residential filtration and standard home use.

  • Dust and lint
  • Pollen
  • Pet dander
  • Mold spores
  • General household debris

MERV 10 filters offer an excellent balance of airflow and filtration performance for most homes.

MERV 11

Enhanced filtration for homes with pets, allergies, or higher indoor air quality needs.

  • Dust and pollen
  • Pet dander
  • Mold spores
  • Fine household particles
  • Some smoke and smog particles

MERV 11 filters are a popular upgrade for homeowners looking for cleaner indoor air without significantly restricting airflow.

MERV 13

Advanced residential filtration for superior indoor air quality.

  • Fine dust particles
  • Smoke and smog
  • Bacteria carriers
  • Microscopic allergens
  • Some virus carrying particles

MERV 13 filters provide higher efficiency filtration performance for residential HVAC systems and are ideal for allergy sufferers, pet owners, and homes with higher air quality concerns.

Always verify your HVAC system can support higher efficiency filtration before upgrading to a MERV 13 filter.

What MERV Rating Is Best for Me?

A simple guide to choosing between MERV 10, MERV 11, and MERV 13.

The best MERV rating depends on your home, your HVAC system, and how much filtration you want.

Choose MERV 10 if you want a dependable everyday air filter for standard home use and general dust control.

Choose MERV 11 if you have pets, dust concerns, mild allergy concerns, or want a stronger everyday filter.

Choose MERV 13 if you want higher efficiency filtration for smaller particles, smoke, and improved indoor air quality, as long as your HVAC system can handle it.

If you are not sure where to start, MERV 10 and MERV 11 are great choices for many homes. MERV 13 is best for customers who want stronger filtration and have confirmed their system can support a higher efficiency filter.

You can also read our full air filter rating guide for a more detailed comparison.

How Often Should I Replace My Filter?

Replacement timing depends on your home, filter type, and system usage.

Most homeowners replace pleated air filters every 1 to 3 months, but the right schedule depends on your home and how often your HVAC system runs.

You may need to replace your filter more often if you have pets, allergies, heavy dust, recent construction, or your air conditioner runs frequently during warmer months.

Check your filter monthly. If it looks dirty, clogged, or restricted, it is time to replace it.

Need a different thickness? Browse our 1 inch air filters, 2 inch air filters, or 4 inch air filters to find the right replacement for your system.

Shipping & Delivery

Information about fulfillment and shipping.

Orders ship from our Clearwater, Florida warehouse.

Most orders ship within 1 business day.

Free shipping is included on all filter orders.

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Which MERV Rating Is Right For You?

Helps capture
MERV 10 air filter MERV 10
MERV 11 air filter MERV 11 Most Popular
MERV 13 air filter MERV 13
Dust, Lint & Debris ✓ ✓ ✓
Pollen & Mold Spores ✓ ✓ ✓
Pet Dander ✓ ✓ ✓
Smoke Particles × ✓ ✓
Bacteria Carriers × × ✓
Virus Carriers × × ✓

MERV 10

Good for everyday homes focused on dust, pollen, and airflow.

MERV 11 Most Popular

The best balance of filtration and airflow for most households.

MERV 13

Maximum residential filtration for allergies, smoke, and indoor air quality.

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