HVAC filters delivered on schedule, free shipping on every order. No typing until checkout. HVAC pros and landlords: case pricing is down here.
Step 1 - Choose your filter type
Step 2 - Tap your filter size (printed on the frame of the filter in your system now)
Step 3 - Who is breathing the air?
Step 4 - How do you want it?
The sizes most homes run, priced in packs so you are set for the season. Every filter is a pleated filter, the kind HVAC techs actually recommend.
Sizes 16x25x1, 20x20x1, 20x25x1. A full season to a full year in one box, depending on your change schedule. Per filter that is $7.50 on MERV 8, $10.83 on MERV 11, and $12.50 on MERV 13.
Sizes 16x25x4 and 20x25x4. More filter surface, longer life, change twice a year.
Sizes 16x25x5 and 20x25x5. These replace the big cabinet filters that name brands sell for up to $150 each. Same fit, same MERV 13 strength, a fraction of the price.
16x25x5 or a different strength? Use the 3 taps up top.
Deep filters are usually sold under a brand part number at a brand price. If your system takes one of these, the same-size MyFilterFlow filter fits the same cabinet, without the brand markup.
| If your filter says | Order this size | MyFilterFlow price |
|---|---|---|
| Aprilaire 410 or 413 | 16 x 25 x 4 | From $34.99 |
| Aprilaire 210 or 213 | 20 x 25 x 4 | From $34.99 |
| Honeywell FC100A1029 | 16 x 25 x 5 | From $74.99 |
| Honeywell FC100A1037 | 20 x 25 x 5 | From $74.99 |
Always confirm the size printed on your current filter frame before ordering. Not sure? Start at Step 1 and tap your way to the match. All brand names and part numbers belong to their owners; MyFilterFlow filters are compatible replacements and are not affiliated with or endorsed by those brands.
The honest intervals, and exactly what auto-delivery is set to.
A 1-inch filter lasts about 90 days. Auto-delivery ships your 6-pack once and the box covers roughly 18 months of changes.
Change a 1-inch filter every 60 days. Dander and pollen load a filter faster, and a loaded filter is the one driving your power bill up.
The big media lasts 6 to 12 months. Auto-delivery is set to every 6 months on 4-inch and yearly on 5-inch, and you can push a shipment out anytime.
A filter only works if it gets changed. Auto-delivery puts the new one at your door right when the old one is due, and takes 10% off every order.
Size and MERV rating, once. It is printed on your current filter's frame.
Every 2 or 3 months for 1-inch filters. Every 6 or 12 months for 4 and 5-inch filters. We suggest the right one for your filter.
The box at your door is your reminder. Swap the filter, toss the old one, done in two minutes. Pause or cancel anytime.
HVAC companies: you change filters on every maintenance visit and your customers forget between visits. Landlords and property managers: every unit you own needs a filter on the same schedule, and tenants do not change them. Buy cases at contractor pricing for truck stock or your units, or put customers and properties on auto-delivery and never hear "my filter is clogged" again. One case minimum. Quarterly auto-ship available.
| Filter | Case | Per filter, delivered |
|---|---|---|
| 1-inch, MERV 8 | Case of 12 | $6.50 - $7.50 |
| 1-inch, MERV 11 | Case of 12 | $9.00 - $11.00 |
| 1-inch, MERV 13 | Case of 12 | $12.00 - $14.00 |
| 4-inch, MERV 11 / 13 | 6-pack | $18.00 - $28.00 |
| 5-inch, MERV 13 | 4-pack | Ask for a quote in the partner form |
Most sizes pay right on this page with the 3 taps up top. If your size is not listed, or you are not sure what your system takes, fill this out instead. It creates a clean summary on this page, you send it to us, and we price it and set up your payment link for you.
For HVAC companies. Tell us what you burn through and we set your case pricing and delivery cadence.
It is printed on the frame of the filter in your system now, in the format 20 x 25 x 1. If the print is gone, measure the slot: length, width, and depth. One warning: the printed size is the nominal size and the real filter is slightly smaller, which is normal. If your system takes a deep cabinet filter, check the depth carefully, a 4-inch filter will not fit a 5-inch cabinet.
MERV 8 is standard dust and pollen control. MERV 11 is the right pick for most homes: pets, allergies, kids. MERV 13 filters the most, including smoke and finer particles. If your system is older or your tech told you to keep airflow easy, stay at 8 or 11.
1-inch filters every 1 to 3 months, 4-inch every 6 to 9 months, 5-inch every 9 to 12 months. Homes with pets or heavy AC use sit at the short end of those ranges.
Our filters are quality compatible replacements made to the same size and MERV specs. They are not made by, affiliated with, or endorsed by the equipment brands they fit. That is exactly why they cost a fraction of the name-brand price.
You pay per shipment, 10% off the listed price, and we tell you before each shipment goes out. Pause, skip, or cancel anytime. No contract.
Tell us before you open the pack and we make it right. Unopened filters can be exchanged for the right size.
Join the MyFilterFlow list. We send your 15% off code right away, plus a reminder when it is actually time to change your filter. No spam, unsubscribe anytime.
The straight facts, in the open, before you spend anything.
Shipping is free on every order, everywhere in the continental US. Orders ship within 1 to 2 business days and typically arrive in 3 to 5 business days. Auto-delivery orders ship on the same schedule each cycle.
If the filter does not fit your system, the exchange is free or your money back: that is the Size Fit Guarantee. Unopened filters can be returned within 30 days for a full refund. Opened filters that arrived damaged or wrong are replaced free.
MyFilterFlow sells online and ships nationwide. Questions about an order, a size, or a subscription: use the order form above or the pro form and we reply within one business day. Manage or cancel auto-delivery anytime from the link in your Stripe receipt email.
If you cannot remember when you last changed it, it is due. Two minutes to set up auto-delivery and it never lands on your to-do list again.
Find your filter