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19.75x21x1 Air Filters

Name: 19.75x21x1 MERV 13 Pleated Air Filter
Brand: FilterBuy
SKU: AFB19.75x21x1M13A
Availability: InStock
Rating: 4.83929 (56 reviews)

MERV 8 (Standard)

3 Month Filter

1. Select Filter Quality (Help Me Choose)

icon indicates a Minimum Efficacy Rating Value of 8 for the replacement air filter

Standard

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icon indicates a Minimum Efficacy Rating Value of 11 for the replacement air filter

Superior

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icon indicates a Minimum Efficacy Rating Value of 13 for the replacement air filter

Best

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2. Select Filter Quantity (Ordering multiple sizes? Try Quick Order)

Need more than one size? Try Quick Order

Ordering multiple sizes? Try Quick Order

3. Select Delivery Method

Deliver one-time

Auto deliver everyDetails on recurring orders

Save 5% with Auto Delivery

19.75x21x1 Air Filter Description

Actual Size: 19.75x21x1"
Model: AFB19.75x21x1M8A

Available In MERV Rating: 8 , 11 , 13
Made in the USA
Ships in 24 hours

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Made inthe USA

Filterbuy ships replacement air filters in 24 hours icon

Ships in24 Hours

Why FilterBuy Air Filters?

Long-Lasting

FilterBuy filters are designed to last up to 90 days, 3 times longer than fiberglass filters. If you have pets, kids, or allergy sufferers in your home or business, replace your filters more often to maintain superior indoor air quality and keep your energy costs low.

all air filters are manufactured by Filterbuy in the USA using all American made components

Made In The USA

All air filters are manufactured by FilterBuy in the USA using 100% American made components. By purchasing directly from the manufacturer, you’re saving big on a premium product.

High Quality

19.75x21x1 pleated air filters are at least 20 times more efficient than fiberglass filters. Filter frames are made of beverage board, which stays strong through humidity and temperatures up to 200° F. Synthetic media provides significantly higher particulate efficiency than standard cotton media.

diagram of how an air filter purifies dirty air

19.75x21x1 Air Filter Reviews

Reviews by

56 Reviews

Steven E.

01/17/2022

Excellent quality and service. Delivery

Excellent quality and service. Delivery was very prompt.

Brian L.

12/27/2021

Shipping was quick. Have not

Shipping was quick. Have not used the product yet. Too many advertisements after purchasing your product.

Michael K.

12/17/2021

On time and perfect

Rosanne C.

12/08/2021

Delivery wasn’t what was originally

Delivery wasn’t what was originally promised but the filters fit perfectly.. will order again in the future

Howard W.

12/06/2021

Good Filter

Just installed first filter, so cannot fully rate it. But system seems to be running very well.

Rubinstein D.

11/26/2021

Great Filters and Great Company Will Refer and Will Buy always Form them

Larry N.

10/04/2021

I purchased 4 ac filters

I purchased 4 ac filters and they were damaged during shipping. I called and was informed that a replacement order was being sent on September 23. To date I h not received the filters nor have gotten any communication as to the status of the order. I am v disappointed.

Thomas M.

09/12/2021

See photos previously sent. Poorly

See photos previously sent. Poorly packaged no weather protection

Donna H.

07/17/2021

Excellent product at reasonable prices

Steven S.

07/08/2021

Exactly what I needed. Shipping

Exactly what I needed. Shipping was quick. I am now on autobuy.

CINDY M.

05/16/2021

AC filters

Ordered 4 filters. Two were damaged. I believe I will still be able to use them with some repair. Ordering process was easy and fast delivery.

Angel E.

05/11/2021

I have not been able

I have not been able to use them yet.

Roland R.

03/24/2021

Great product delivered on time

Patricia S.

03/08/2021

Excellent product

Exactly as needed for my unit. Fit perfectly, and quality is very good. Excellent product. The only issue was how long it took to receive it since the item was out of stock, several weeks.

Randy B.

12/28/2020

As expected

James K.

12/15/2020

Good quality material and fit

Good quality material and fit is perfect

SALLY C.

12/13/2020

Arrived quickly and fits perfect

Arrived quickly and fits perfect !!!

Barbara B.

11/05/2020

Have in the past had

Have in the past had difficulty finding filters to fit exactly. These fit great!

Caroline C.

10/13/2020

Great product fast shipping

Adrienne S.

10/12/2020

Have an odd size filter.

Have an odd size filter. The filters they made fit perfectly.

George L.

09/21/2020

You get what you pay

You get what you pay for. These are quality products that arrive when promised and work well. You can’t ask for more.

Lori M.

09/03/2020

installed, fit is great,

jose q.

08/23/2020

Very good quality

John W.

08/17/2020

I'm impressed

Initially, the wrong size filters were sent out. I sent an e-mail and correct size filters were immediately ordered. Well done!

David P.

08/04/2020

I received excellent quality filters

I received excellent quality filters that which my A/C just right.

Lawrence H.

07/29/2020

Good to work from

Thomas G.

07/20/2020

Fits ac good, easy and

Fits ac good, easy and large list of sizes to pick from, fast delivery got the filters before the ac repairman was scheduled will continue purchasing filters from here

Carlos L.

07/14/2020

Excellent choice! The filter is

Excellent choice! The filter is fit perfectly, and of much better quality than the original.

William C.

07/05/2020

Nice

Ira M.

07/04/2020

Great Filters And Customer Service

My filers are a custom size and fit perfect. The filters are excellent quality. Their customer services is a 10. I am recommending them to all my friends. I will always buy from them.

THOMAS D.

05/19/2020

They always have the product

They always have the product I need at a reasonable price and quick shipping. They are very reliable. I’d give them 6 stars if I could.

Carlos M.

05/05/2020

Your filters

I have the filters I use to be excellent. Good tight fit and they do keep my coils clean. I. Price less dust as well. The service is great, always have been a short time from order to receipt. I tell others about your product as well. Thanks.

Maria S.

04/28/2020

Air Filters

Received the order quickly and the quality of the filters are excellent. Company offers great service.

Monique T.

04/22/2020

Very pleased with quality and

Very pleased with quality and options.

Richard S.

01/26/2020

PACKED FOR SECURITY, AND PROMPTNESS

Frank D.

10/30/2019

Just for information

Prompt service on a good product. Not your fault but box was crushed in shipping and partially open. Product was not damaged.

Meritoria J.

08/21/2019

Past usage great

Dondy L.

05/22/2019

Good fit.

THOMAS D.

05/04/2019

Great service. They quickly corrected

Great service. They quickly corrected an error I made in my order, no questions asked. This was my first purchase from them, but it will not be my last.

Charles R.

02/17/2019

Received what we ordered and

Received what we ordered and very timely

Tonda C.

02/15/2019

Perfect size!

This is the first time I’ve ever been able to just put a filter in and close the door. Because of the odd size, I’ve always had to cut a new one. What a pain! So glad I found FilterBuy.

Pamela W.

01/11/2019

Good purchase.

Barbara A.

08/14/2018

Air filtets

I need an common size. Very difficult to find unless I order 12 or more(Lowe’s, Acr, Home Depot) . Ones I was using in past, were very difficult to change... didn’t fix quite right. These slide right in, free delivery on any order. One last thing, website provides very valuable information.

Lester S.

07/12/2018

Fast, friendly service

My order was shipped promptly and correctly. These new filters are for future use, but I'm sure they'll be as effective as the ones received and used previously.

Juan N.

06/25/2018

Great service

Everything was smooth and on time. Thank you

William A.

06/21/2018

Filters arrived on time and

Filters arrived on time and in good condition. One is working well at this moment.

George D.

06/04/2018

Quick delivery fit great in

Quick delivery fit great in my machine

jose q.

05/17/2018

Filter

Very good product

David G.

05/13/2018

It's too soon to review

I've only had the filters installed for a few weeks, so it's not possible to write a detailed review. However I can say that the construction of the filters are impressive. All previous filters I've used were "flimsy" - these filters are absolutely solid. I'll write another review in a few months.

Harriet G.

04/10/2018

Very pleased on delivery time

Very pleased on delivery time and so happy it fits my airconditioner

Peg B.

01/10/2018

Good stuff

Quick delivery. Great price

Tom M.

11/21/2017

They fit great!

kathleen s.

08/21/2017

A/c filters

received filters quickly after they were ordered. Good quality. Exactly like promised.

Dennis S.

05/25/2017

Just upgraded to a better

Just upgraded to a better filter from filterbuy. I wanted to test the draw on the AC system with a higher rated filter. I am very pleased with the results! The system does not seem stressed from greater filtering. I am hoping it will have an added benefit of keeping dust levels down .

Ronald C.

05/15/2017

ordering was easy and the

ordering was easy and the delivery fast I will do business with filterbuy again.

Karen B.

06/20/2015

Put it right into our

Put it right into our unit and it fit perfect! Thanks for your fast service,

More About MERV Ratings

MERV 8 (Standard)

Actual: 19.75x21x1"
Model: AFB19.75x21x1M8A

The 19.75x21x1 MERV 8 filter is our most popular rating, as it filters well in most spaces.
Traps and blocks 90% of air particles in your space, including pollen, dust mites, mold, and large particles like pudding mix.
Ideal for basic and standard homes and businesses.

6 for 24.48 each

5% discount

•Pollen•Dust Mites•Mold•Larger dust particles, like pudding mix•Standard residential / commercial use

MERV 11 (Superior)

Actual: 19.75x21x1"
Model: AFB19.75x21x1M11A

The 19.75x21x1 MERV 11 filter blocks almost all bacteria from the air while keeping proper air flow and minimizing system backpressure.
Traps and blocks 95% of air particles in your space, including pet dander, lint, dust, pollen, debris, mold spores, smoke, and smog.
Ideal for standard and superior homes and businesses.

6 for 28.24 each

5% discount

•Pollen•Dust Mites•Mold•Auto Emissions / Large Particles like Milled Flower•Superior Commercial and Residential

MERV 13 (Best)

Actual: 19.75x21x1"
Model: AFB19.75x21x1M13A

The 19.75x21x1 MERV 13 filter is our best-of-breed filter, providing maximum filtration while elevating the performance of your HVAC system.
Traps and blocks 98% of air particles in your space, including pet dander, lint, dust, pollen, debris, mold spores, smoke, smog, and bacteria–even particles that carry viruses.
Ideal for superior homes and businesses and smoking lounges.

6 for 35.77 each

5% discount

•Pollen•Dust Mites•Mold•All Bacteria•Proplet Nuceli (sneeze)•Smoking Lounges•Best of breed, hospital grade filter

Is it Time to Change Your Filter?

Generally, we recommend you replace your air filters every 90 days. Find out below if you should change your filters more often.

If someone in your home has asthma and/or allergies...

Change your filter every 6 weeks to ensure indoor air quality is at its best.

If you have pets...

Change your filter every 2 months to avoid shedding and odor buildup.

If you have young children...

Change your filter every 2-3 months, as having clean air is even more important with children in your home.

Build a Custom Size

Simply measure the length and width of your filter with a tape measure and choose the closest size (to 1/8”) in the drop down menu. 1/8” tolerance is standard and should not cause a problem in any standard filter application.

Please note that the ‘actual’ filter size, ie the size that your tape measure shows, should be used when creating a filter with this tool, not a nominal filter size. Note that the depths of each filter are standard, as shown to the right.

Simply measure the length and width of your filter with a tape measure and choose the closest size (to 1/8”) in the drop down menu. Please note that the filter depth is standard.