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Fresh air, on a schedule

Filters that fit. Delivered before you need them.

Tell us your filter — by HVAC size or purifier model — and we ship the right one within 24 hours.

Find your filter by size
W
H
D

Your size is printed on the frame of your current filter.

The model number is on the label on the back or bottom of your purifier.

Tested twice a year

Every batch goes to an independent lab. Reports are published on our site.

Reviewed by specialists

Our filtration specs are reviewed by practising allergists before launch.

$2M liability cover

Every filter ships insured, so a defective unit never becomes your problem.

Fit guarantee

If it does not seat properly, we replace it free within 7 days of delivery.

Real people, not bots

US support team, Monday to Friday, 8am to 6pm Central.

Shop air purifier filters

Pick your purifier brand, then the model on the label. HEPA and activated carbon replacements for the most common US models.

Levoit Coway Honeywell Blueair Winix GermGuardian Medify Air Dyson Sharp Philips

Shop HVAC filters by size

Over 600 sizes in stock, cut in 1/8 inch increments. Enter your exact size to jump straight to it.

20 x 20 x 1 20 x 25 x 1 16 x 25 x 1 16 x 20 x 1 14 x 20 x 1 12 x 12 x 1 18 x 20 x 1 20 x 30 x 1 24 x 24 x 1 16 x 25 x 2 20 x 25 x 2 Custom size

MERV ratings

Which filter do you actually need?

MERV just means how much the filter catches. Higher catches more — but your system has to handle it.

Rating
Catches
Schedule
Price
MERV 8Everyday
Dust, lint, pollen, dust mites
Every 90 days
from $9
MERV 11Better
Adds pet dander, mold spores, smoke
Every 60 days
from $13
MERV 13Best
Adds bacteria, virus carriers, wildfire smoke
Every 60 days
from $17

How it works

Three steps to cleaner air

1. Tell us your filter

Enter the HVAC size printed on the frame, or pick your purifier brand and model.

2. Pick your MERV

MERV 8 for everyday dust. MERV 13 for pets, allergies or wildfire smoke.

3. Set the schedule

Get a fresh filter every 30, 60 or 90 days and save 15%. Skip or cancel whenever.

Reviews

12,000+ homeowners switched

I typed in the size off my old filter and it showed up two days later. I'm never going back to the store.
Sarah M.
Austin, TX
We switched to MERV 13 with the subscription and my son's allergies got noticeably better. Set it and forget it.
David R.
Denver, CO
Our old house has a weird 19.75 x 21.5 opening. Nobody stocks it. Filtend cut it for me and it fits perfectly.
Karen L.
Portland, OR

FAQ

Common questions

The measurement is printed on the frame of the filter you are replacing, usually along the narrow edge. It looks like 20 x 25 x 1. If it has worn off, measure the opening in your return vent: width, then height, then depth.

Choose the purifier brand, then the model number. The model number is printed on the label on the back or bottom of the unit, and often starts with letters followed by digits.

Every 90 days for most homes. Every 60 days if you have pets or allergies. Every 30 days during heavy wildfire smoke or if your system runs constantly.

MERV 8 for general household dust. MERV 11 if you have a shedding pet. MERV 13 for allergies, asthma or smoke. Check your HVAC manual first, because some older systems cannot handle the denser MERV 13 media.

No. They are compatible replacements manufactured to match the original dimensions and filtration performance. They are not made by or endorsed by the appliance brand.

We cut custom filters to any size in 1/8 inch increments. Enter your exact measurements and we will make it. Custom sizes ship in 2 to 3 business days.

Yes. Cancel, skip a shipment or change your schedule from your account page at any time. No phone call and no cancellation fee.

Stop forgetting. Start breathing easier.

Enter your size and get a fresh American-made filter on its way in under a minute.

Find My Filter Size

Contact

We answer every message

Real people, based in the US, usually replying within one business day.

Pricing

Pick the filtration that fits your home

Same American-made frame and media at every level. You are only choosing how much it catches.

MERV 8

Everyday

from $9

The standard choice for most homes. Keeps airflow strong and your system happy.

  • Dust and lint
  • Pollen
  • Dust mites
  • Change every 90 days
Shop MERV 8

MERV 11

Better

from $13

A solid step up if anyone in the house has allergies or a pet that sheds.

  • Everything in MERV 8
  • Pet dander
  • Mold spores
  • Change every 60 days
Shop MERV 11

MERV 13

Best

from $17

Hospital-grade filtration. The one to buy during wildfire season or for asthma.

  • Everything in MERV 11
  • Bacteria
  • Virus carriers
  • Change every 60 days
Shop MERV 13

Save 15% with a schedule

One less thing to remember. We ship on your schedule, and you can skip, pause or cancel from your account whenever you want.

Reminders

Pick 30, 60 or 90 days and we handle the rest.

15% off every order

Applied automatically at checkout, no code needed.

Change anytime

Skip a delivery, switch sizes or cancel in two clicks.

Not sure which one?

Enter your filter size or purifier model and we will show you exactly what fits.

Find My Filter