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Coupon Abbreviations
  • SC = Store Coupon
  • MC = Manufacturer Coupon
  • SS = Smart Source
  • RP = Red Plum
  • PG = Proctor and Gamble
Coupon Terms
  • WYB = When You Buy
  • B1G1 = Buy One Get One Free
  • .75/1 = 75 cents off one item
  • .75/3 = 75 cents off three items
  • EXP = Expiration Date

Going Nuts? I can help you understand coupon terms and abbreviations

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Home Depot Air Filters Sale

I spotted a nice deal from Home Depot for cases of Air Filters at 50% off. I confess, in asking my husband what we should order, I realized I didn’t know much about air filters at all. After seeing that the price for a case of 12 can vary drastically from $17 up to $100 or more, I spent some time researching how to get the most bang for my buck.

Here’s what I found so we can all make more informed decisions when stocking up on air filters:

Air Filter Size
The easiest way to find out what size you need is to go check the one you have right now. I wrote it down and emailed it to myself just in case I ever forget. Now I can look it up instead of going back through the trouble. This is especially important if your AC unit is in an out of the way place like a crawl space or basement.

FPR Rating

In doing my homework, I learned that you could sort the air filters by their FPR rating, but apparently this is a metric that Home Depot uses try to compare the products. It really doesn’t mean a whole lot though and you are better off choosing based on the MERV index.

MERV Rating
Merv stands for minimum efficiency reporting value. This is the industry rating that tells you the level of filtering you can expect. The higher the number, the more efficient it is at removing particles from the air. The scale is 1-16.

Anything above an 8 is considered a “commercial” application so don’t let them up-sell you on a more expensive filter with a MERV of 12 because it’s not really going to do much for you.

I needed a 16x25x1 air filter and there were 15 options to choose from on HomeDepot.com. After comparing the price per filter to the MERV and FPR ratings, I found that although the price seemed to go up with FPR rating, the MERV ratings on most of the filters are actually the same… I could choose a MERV 6 for $3 a filter or a MERV 11 for $5-$8 per filter. I’ll let you guess which one I picked!

Do you have any tips for how to choose an air filter?

    • traci0322

      LOVE this! Thank you. As a single mom, I feel like I have to research everything and then double check. I have heard many contradictory opinions from personnel at Home Depot and Lowe’s and from my heating and air technician regarding the quality of air filter that I need. I have paid anywhere between $6 and $21 for a filter, but never really knew why there was such a price difference– and if it was really necessary to spend more. It was one of those things that kept going undone on my “find out about this” list. I appreciate the info!

    • marktars

      Two big things to consider here:

      1. How long does the filter last? When does it need to be replaced? Some are 30 days, some 90 days and some last as long as 6 months. Obviously, longer is better because a 90 filter can be 3x as expensive as a 30 day and breakeven.

      2. Is the filter washable or reusable? Some filters can be cleaned and reused. These tend to be substantially more expensive, but if you don’t mind the work of cleaning them, you never buy a new filter again.

      Also, savers should look online for filters as well. Since they are so light weight, shipping is often free and if you find an online sale, you can save 50% or more.

    • justamom

      As a mom of a child with allergies, the MERV 8-12 is worth the extra price. I have noticed a HUGE difference in how the dust in the house is minimized with a MERV 8-12. I replace the filters as directed on the box. Also, my vents stay cleaner. If you live in an older home and have never cleaned your vents, you might want to look into it. When we moved into a 50 year old home, we had the vents cleaned. The AC/Heat man had 4 garbage bags full of “junk” from the vents. I would have never believed it if I hadnt seen it.

    • MeMe

      I’m with you “justamom”. We had our ducts cleaned almost 10 years ago and we need to do it again. I love to open my windows on a cool day and with the pollen in Atlanta, it is not a good thing to do. So we are about due again. Thanks for the info.

    • MichelleC.

      Make this deal even better…Filtrete has a mail in rebate get $6 back wyb (3) individual filters. It say multi-packs are considered one unit but if you look at the Home depot site, the filters come in 4 packs of 3…so this rebate should apply.


    • Christi

      Our Repairman says that the cheapest 30 day filters are the ones to get, and they will extend the life of your heat pump. Replacing them more often is easier on the machine

    • NancyAlexis

      For my home, it just works out best for me to change them monthly. It doesn’t matter if i buy the cheap or expensive, after a month my home gets dusty. So, naturally, i buy the cheaper ones. And this post was timely because i am down to my last filter! Thanks Jenny!

    • I would love to hear from an HVAC expert…My husband buys the cheapest 30 day ones and we change them every month. He says the more expensive ones put too much strain on the unit…

    • Mooglie Mush

      Also, if you have a “HABITAT FOR HUMANITY” Restore in your area you may find those filters there and the price is awesomely cheap! :)