Shop by





Actual Size: 17.38x23.38x0.75"
RESIDENTIAL AND/OR COMMERCIAL USE
Change Every 3 Months





Actual Size: 17.38x23.38x0.75"
RESIDENTIAL AND/OR COMMERCIAL USE
Change Every 3 Months





Actual Size: 17.38x23.38x0.75"
RESIDENTIAL AND/OR COMMERCIAL USE
Change Every 3 Months
At Filterbuy, we don't cut corners—we craft high-quality air filters right here in the USA and ship them to your doorstep for free. No delays, no gimmicks—just clean air, made easy. With thousands of five-star reviews and filters built for real life & every HVAC system, it's no wonder why over 4 million families trust Filterbuy.

Proudly Made In The USA

Fast, Free Shipping on Every Order

Premium Materials That Go The Distance

85,000+ 5-Star Reviews From Happy Customers

Save Up to 70% Per Filter with Packs




Measure length × width × depth with a tape measure to find the actual size.

Round up each dimension to the nearest whole number to get the nominal size. Example: 17.38x23.38x0.75" in → 18x24x1 nominal.

Search by nominal size on our site for the best fit.

If the filter you buy doesn't fit, we'll send you a better size.
MERV stands for Minimum Efficiency Reporting Value—but don't let the technical name fool you. It's just a way to rate how well an air filter traps stuff like dust, pollen, pet dander, and smoke. The higher the MERV number, the more particles it catches—and the cleaner your air will be.

Comparable to:FPR: 4-7
MPR: 600-1000
Dust & Debris
Dust Mites & Particles
Pollen
Mold
Lint
Dander
Comparable to:FPR: 6-9
MPR: 1200-1550
Dust & Debris
Dust Mites & Particles
Pollen
Mold
Lint
Dander
Smoke & Smog
Comparable to:FPR: 10
MPR: 1900-2800
Dust & Debris
Dust Mites & Particles
Pollen
Mold
Lint
Dander
Smoke & Smog
Bacteria
Comparable to:FPR: 10
MPR: 1900-2800
Dust & Debris
Dust Mites & Particles
Pollen
Mold
Lint
Dander
Smoke & Smog
Odors
































We build every Filterbuy filter to deliver reliable 90-day performance—thanks to smart design and premium materials that do the heavy lifting. Here's what makes the difference:
More pleats = more surface area to capture dust and debris, keeping your air cleaner longer.
Pleats are magnetized to attract and trap microscopic particles—like pet dander, pollen, and smoke.
Engineered to resist warping in extreme temperatures and high humidity.

A layer of metal reinforcement keeps pleats evenly spaced and structurally sound—no sagging, even at high airflow.
Assembled with care. Built to perform. Ships fast, free, and reliably from our U.S. facilities.

Turn Off Your HVAC SystemSafety first.

Remove The Old FilterLook for the airflow arrow and make note of the direction.

Slide In Your New FilterArrow should point toward the system (same direction as before).

Turn Your System Back OnAnd enjoy the fresh, clean air.
Not all air filters are created equal. Pleated filters don't just last longer—they actually clean your air better. Here's how they stack up:

Efficiency:
High (MERV 8–13) – Traps more particles
Lifespan:
90 days – Long-lasting performance
Air Quality:
Excellent – Cleaner, healthier air
Materials:
Recyclable and durable

Efficiency:
Low (MERV 4 or less) – Misses small stuff
Lifespan:
30 days or less – Replace often
Air Quality:
Minimal – Basic protection only
Materials:
Thin, flimsy, and not recyclable
Pleated filters are a no-brainer—more protection, less hassle, and better air for your home.
Changing your filter on time keeps your HVAC system running efficiently—and helps protect your lungs from dust, allergens, and airborne irritants. Here's how often to swap it out based on your needs:

For most homes without pets or special air quality concerns. Great for general upkeep and energy efficiency.

Shedding fur, dander, and allergy triggers can build up fast. Changing your filter every two months helps keep the air fresher and symptoms at bay.

For households affected by smoke, pollution, or respiratory conditions, monthly changes ensure maximum protection.
| Nominal Size | 18 x 24 x 1 inches |
| Actual Size | 17.38 x 23.38 x 0.75" inches |
| Filter Type | Pleated |
| Media | Electrostatically Charged |
| Frame | Beverage Board |
| MERV Ratings Available | 8, 11, 13, Carbon |
| Lifespan | Up to 90 Days |
| Origin | Made in USA |
At Filterbuy.com, we know from decades of experience that the right air filter makes all the difference for your home’s air quality and your HVAC system’s lifespan. That’s why our 18x24x1 MERV 8 HVAC and furnace air filters are carefully engineered to trap the most common indoor pollutants — like dust, pet dander, and pollen — without restricting airflow or driving up energy costs.
Unlike generic filters, every Filterbuy filter is made in the USA using premium, sustainably sourced materials that withstand daily use and frequent filter changes. Based on feedback from thousands of homeowners and our rigorous testing, we’ve fine-tuned our pleated MERV 8 filters to deliver the ideal balance of protection and efficiency, helping families like yours breathe cleaner, healthier air year-round.
1️⃣ Breathe Cleaner Air
Traps dust, pollen, mold.
Keeps your family healthier.
2️⃣ Save on Energy Bills
Save 5%–15% on energy (DOE).
3️⃣ Trust Filterbuy Quality
USA-made. Premium materials.
Tested by real homeowners.
4️⃣ Simple Ordering
One-time or auto-delivery.
Fast, free shipping.
5️⃣ Proven & Trusted
Millions of filters made.
Thousands of homes protected.
When it comes to keeping your home’s air fresh and your HVAC system running smoothly, choosing the right filter matters. Filterbuy’s 18x24x1 MERV 8 air filters are designed to capture common airborne particles like dust, lint, mold spores, and pollen — all while maintaining optimal airflow so your system works efficiently and uses less energy.
Every Filterbuy filter is proudly made in the USA using high-quality, eco-friendly materials and advanced pleated construction for longer-lasting performance. Easy to install and replace, these filters help protect your family’s air quality and extend the life of your furnace or AC unit.
Join thousands of homeowners who trust Filterbuy for clean, healthy air and reliable HVAC protection — all delivered right to your door on your schedule.

“After manufacturing millions of filters and listening to real feedback from homeowners, we know that a well-made MERV 8 filter strikes the perfect balance — it captures the dust and allergens that matter most without choking your HVAC system. That’s why every Filterbuy filter is built to deliver clean air, energy savings, and peace of mind you can feel with every breath.”
1️⃣ Indoor Air Quality: Hidden Risks
We see it daily: indoor air can be 2–5x more polluted than outdoor air.
Common culprits: dust, pollen, mold.
Our MERV 8 filters target these threats head-on.
Source: EPA Indoor Air Quality
2️⃣ Energy Costs: Stop Wasting Money
Clogged filters = wasted energy.
The DOE confirms: replacing a dirty filter can cut AC energy use by 5%–15%.
Our customers love our easy reordering — clean filters, lower bills.
Source: DOE Home Heating & Cooling
3️⃣ Health: Breathe Easier at Home
Families tell us they notice fewer allergy and asthma issues.
The American Lung Association agrees: indoor pollutants worsen breathing problems.
A quality filter is your first line of defense.
Source: ALA – Healthy Air
Our real-world experience + trusted stats = cleaner air, lower costs, healthier families.
When it comes to your home’s air, there’s no room for shortcuts. We see it every day — the right filter choice makes all the difference.
What we’ve learned first-hand:
Clean air starts with the right filter.
A true MERV 8 traps dust, pollen & mold — no wasted energy.
USA-made means reliable quality, every time.
Why it matters:
1️⃣ Healthier air for your family.
2️⃣ Lower energy bills, longer system life.
3️⃣ Peace of mind you can feel with every breath.
In our opinion, it’s simple: Filter smart. Breathe easy. That’s the Filterbuy way.
Ready to get started? Follow these quick steps:
1️⃣ Check Your Size
Confirm your filter size: 18x24x1 MERV 8.
Match it with your HVAC or furnace specs.
2️⃣ Pick Your Pack
Choose single or bulk packs.
Set up auto-delivery so you never run out.
3️⃣ Order Online
Click Buy Now.
Fast, free shipping from our USA team.
4️⃣ Swap & Breathe Easy
Install in minutes.
Need help?
Our Filterbuy team is here for you.
Tap here to order your filters today!
MERV stands for Minimum Efficiency Reporting Value. A MERV 8 filter is designed to trap everyday particles like dust, pollen, mold spores, and lint, without blocking airflow. It’s the perfect balance for homes that want clean air and an efficient HVAC system.
Most homes should replace their filters every 1–3 months, depending on usage, pets, and allergies. If you have pets or allergies, check it monthly to maintain optimal air quality.
Yes! A clean, quality filter helps your HVAC system run efficiently. According to the U.S. Department of Energy, replacing a dirty filter can cut your AC’s energy use by 5%–15%.
Absolutely. Every Filterbuy filter is proudly made in the USA using high-quality, eco-friendly materials and tested for consistent performance.
Filterbuy offers direct-to-door delivery, custom sizes, bulk packs, and auto-delivery — plus trusted quality you won’t always find on store shelves. We stand by our filters with real testing and homeowner feedback.