• Aerterra air filter packaging with text and a filter on a cardboard background
  • Aerterra 12x12x1 MERV 11 AC Furnace Air Filter Plus box, back of package
  • Hand holding the Aerterra 12x12x1 MERV 11 air filter
  • Pushing a fresh Aerterra air filter into a ceiling intake vent
  • Removing a dirty air filter to replace it with a clean Aerterra filter
  • Changing the air filter on a home furnace
  • Replacing the air filter on a home central air conditioning system
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Aerterra

Aerterra 12x12x1 MERV 11 AC Furnace Air Filter Plus (1-Inch Pleated)

Aerterra 12x12x1 MERV 11 AC Furnace Air Filter Plus (1-Inch Pleated)

$20.00 USD
$20.00 USD
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  • Please expect filters to ship in 2-3 days!

The 12x12x1 MERV 11 Air Filter Plus steps up filtration for homes with pets or allergies, capturing fine particles like pet dander, smoke, and fine dust on top of everyday dust, pollen, and mold spores. This compact size fits smaller HVAC systems and return vents.

  • MERV 11 filtration – captures fine particles down to 1 micron, including pet dander, smoke, and mold spores
  • Plant-based media – made from renewable, corn-based fiber grown by American farmers instead of petroleum-based materials
  • Fits 12x12x1 return vents and furnaces – check the size printed on your old filter's frame to confirm fit
  • Lasts about 90 days under normal use, sooner with pets or heavy HVAC use
  • Available as a single unit or case pack, with free shipping on every order

Subscribe and save to have a fresh filter delivered automatically on your schedule, so you never have to remember to reorder.

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How the Aerterra subscription works

Clean air, zero hassle. Order more and pay less, or subscribe and never think about it again.

  • Aerterra subscription icon phone ordering

    1: Pick your filter

    Choose the right size high-performance air filter for your space.

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    2: Set it & forget it

    Subscribe and get free shipping on fresh filters right when you need them. No more guessing or last-minute hardware store runs!

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    3: Breathe easy

    Enjoy cleaner air while reducing waste. Our filters are made with eco-conscious materials, so you’re helping the planet with every swap!

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    4: Stay in control

    Need to pause, swap, or adjust your subscription? No problem! Manage everything easily from your account.

Real Customers, Real Results

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  • Emily · Unboxing

  • Lora · Testimonial

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  • Ryan · Warranty

  • Lora · Unboxing

  • Emily · Testimonial

  • Ekaterina · Review

Frequently Asked Questions

What size air filter do I need?

Check the size printed on the frame of your old filter, or measure the length, width, and depth in inches (round up if needed). Aerterra filters are labeled by nominal size, like 16x25x1, so you can match it directly to your return vent or furnace opening.

How often should I replace my Aerterra filter?

Most 1-inch filters should be replaced every 60–90 days, depending on your home's air quality, pets, and HVAC usage. Thicker 4-inch filters typically last 6–9 months. A subscription ships a fresh filter automatically on the schedule that fits your home.

What does the MERV rating mean?

MERV (Minimum Efficiency Reporting Value) measures how well a filter captures airborne particles, on a scale of 1–16. Higher MERV ratings capture smaller particles like pet dander, smoke, and bacteria. We offer MERV 8, 11, and 13 options depending on how much filtration your home needs.

What are Aerterra filters made from?

Aerterra filters are made from renewable, plant-based corn fiber media grown by American farmers, replacing traditional petroleum-based filter materials, so you get cleaner air with a smaller environmental footprint.

Can I subscribe and save?

Yes. Choose Subscribe & Save at checkout to set your own delivery frequency, get free shipping on every order, and pause, swap, or cancel anytime from your account.

Not sure this filter fits your system?

Message our team before or after you order and we'll help you confirm the right size for your HVAC system or return.

Questions & Answers

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Learn More About Your Filter

Sizing, MERV ratings, and replacement guides to help you get the most out of it.

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Same size, different level of filtration.