The right air filter, right when you need it.
Find replacement HVAC filters in seconds. Choose your size and filtration level, then order once or schedule automatic delivery.
Find My Filter
Enter your filter dimensions to see what fits.
Not sure of your size? Check the dimensions printed on the edge of your current filter. Help Me Measure
Fast, dependable delivery
Order today and rest easy knowing your filters are on their way.
Easy size matching
Find your exact size fast with our guided filter finder.
Multipack savings
Stock up and save with multipacks for every size.
Scheduled replacement
Set a delivery schedule so you never run out.
Shop by popular size
Most home filters come in a few common sizes. Tap yours to see every MERV rating and pack option.
Looking for a different size or need help measuring?
Shop by filtration level
Choose from our everyday standard, high-capacity, and advanced MERV filters. Pick the level that matches your home, pets, and HVAC system.
Everyday Air
Our standard filter, MERV 10, for common dust, pollen, and everyday household particles.
Best for: Everyday homes
ShopHigh-Capacity Filters
Thicker pleated filters with more surface area for higher airflow and longer life between changes.
Best for: Higher airflow & longer life
ShopAllergy Support
For households seeking stronger filtration for pet dander and finer airborne particles.
Best for: Pets & allergies
ShopAdvanced Filtration
For customers seeking a higher level of filtration for smaller airborne particles, where compatible with their HVAC system.
Best for: Higher filtration
ShopCheck your HVAC system's specifications before choosing a higher-MERV filter — a too-restrictive filter can strain your equipment. Contact your equipment manufacturer if you're unsure.
Bestselling replacements
Our most-ordered sizes and filtration levels — see your exact fit at a glance.
3-packNominal 20x25x1 • Actual 19.7 x 24.7 x 0.8 in
$34.99
$11.66 per filter
One-time purchase
Subscribe & schedule
2-packNominal 16x25x1 • Actual 15.7 x 24.7 x 0.8 in
$27.99
$14.00 per filter
One-time purchase
Subscribe & schedule
Mix sizes, keep the multipack discount
Different rooms, different units — no problem. Order a mix of sizes in one go and still get multipack savings across your whole order.
One order, every size you need
Whether it's a 16x25 for the hallway and a 20x25 for the main unit, combine any sizes in a single cart. Just choose your pack quantity and the discount applies per pack — not per size.
- 44-packStock up on the essentials.
- 66-packA season's worth on hand.
- 88-packCover more of the house.
- 1212-packBest value per filter.
Buy more, save per filter
Packs of 4, 6, 8, and 12 lower the cost per filter on every size across the site. Mix and match, then check out with everything in one delivery.
Shop a MultipackHow Filterstork works
Getting the right filter is a three-step process — no guesswork required.
Find your size
Read the dimensions on your existing filter or use our measuring guide.
Measuring guide →Choose your filtration
Compare MERV options based on your home, pets, allergies, and HVAC requirements.
Compare MERV levels →Order once or schedule
Buy a multipack or receive replacements on a recurring schedule that suits your home.
Explore subscriptions →Never forget another filter change.
Choose a schedule that works for your home. Pick a delivery cadence and Filterstork sends replacements when it's time to change them.
- 1MonthlyNew filters every 30 days
- 2Bi-monthlyEvery 2 months, twice a quarter
- 3QuarterlyEvery 3 months — the classic
- 4Bi-annualEvery 6 months, twice a year
- 5AnnualOnce a year, set and forget
- Adjustable delivery schedule, managed from your account
- Skip, reschedule, or cancel anytime per our policy
Clean-air essentials without the last-minute hardware-store run.
Buying a filter shouldn't mean hunting through a dusty aisle for the right size. Filterstork organizes everything around what matters — size, filtration level, quantity, and replacement schedule — so the right filter arrives exactly when you need it.
Find the correct size quickly
Enter your dimensions and skip the guesswork.
Compare filtration clearly
MERV levels explained in plain language.
Save time with multipacks
Stock the whole house at once.
Keep replacements on schedule
Automatic delivery when it's time to change.
Filters for every property on your list.
From property managers to HVAC professionals, Filterstork makes it easy to keep every unit stocked with the right filters — in the right sizes, in the right quantities, on the right schedule.
Homeowners, property managers, and HVAC pros trust Filterstork
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Know before you buy
Quick, practical guides to getting the right filter the first time.
Frequently asked questions
Quick answers to common questions. Need more help? Visit our full help center.
How do I find my filter size?
Check the dimensions printed on the edge of your current filter — they'll read like 16x25x1. Directions are width x length x thickness. Not sure where to look? Our measuring guide walks you through it.
What's the difference between nominal and actual size?
Nominal size is the rounded measurement printed on the label (like 16x25x1). Actual size is the exact measurement of the filter itself. Both are listed clearly on every product page so you can match your system with confidence.
Which MERV rating should I choose?
Our standard filter is MERV 10 for everyday homes and common household particles. For homes with pets or finer airborne particles, MERV 11 adds extra support, and MERV 13 offers advanced filtration. We also offer high-capacity filters for higher airflow and longer life. Confirm the rating is compatible with your HVAC system before ordering.
How often should I replace my filter?
Most households replace filters every 90 days, though factors like pets, allergies, and equipment usage can change that. Your best schedule depends on your home.
Can I order multiple sizes?
Yes. You can mix sizes within a single order, and multipacks make it easy to stock filters for multiple rooms or units.
How does recurring delivery work?
Choose a schedule that fits your home and we'll send replacements when it's time to change them. You can manage, skip, or reschedule from your account.