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"Game changer" - Forbes
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Discount Filters is definitely the place to go if you are in the market for a new air or furnace filter, refrigerator water filter, or humidifier filter. The prices are competitive, they offer free shipping and returns, and they also send you a reminder email when it's time to replace your filter, so you don't have to keep track of when you last did so!

All of their products also come with a one year purchase guarantee, so you don't have to worry that you're getting a subpar product. also offers an auto-delivery option, which is a subscription program that will send you filters on a set schedule, and this service also assures you that your price will never go up. The deals are great on their own, but if you are able to find a coupon, promo code, or a discount code, your savings will just keep climbing! What's not to like about this website? Any homeowner or business owner needs one or more of these types of filters, so go check out their website today and get started saving on those filters! Coupon Codes, Promo Codes & Discounts

Popular Promotional Codes

10% off Coupon

10% off Sitewide.

Popular Coupon
35 uses
Last used 6 hours ago
Avg. savings $8.17
#1 Best Promo Code


$15 off orders of $100+.

Verified Coupon
6 uses
Last used 14 hours ago
Avg. savings $4.50
#2 Best Promo Code


Try all's 5 codes at checkout with one click

52 uses
Last used 6 hours ago
Last saved $8.17
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Three ways to save money with Capital One Shopping

Coupon codes are great... but did you know Capital One Shopping can help you snag even deeper discounts? It’s all completely free, and it just takes a minute to get started. Here are the three ways we can help you hang onto your cash:
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$20 off orders of $125+.

Verified Coupon
4 uses
Last used 14 hours ago
Avg. savings $3.81
#3 Best Promo Code

Special Offers


Shop Pool and Spa and Get Free Shipping and Returns.


Shop Shower Filters and Get Free Shipping and Returns.


Shop Air Filters and Get Free Shipping and Returns.


Shop Refrigerator Filters and Enjoy Free Shipping and Returns.


Shop Furnace Filters and Get Free Shipping and Returns.


Shop New and Cool and Get Free Shipping and Returns.


Shop Humidifier Filters and Get Free Shipping and Returns.


Build Your Own Custom Cleaning Kit: Selected Products Now: 5 for $35.00.


$5 off any Order When You Buy a Clear Choice Fridge Filter and An AirX Air Filter in the Same Order.


Shop for Last-Minute Gifts.


Fridge Filters.


Make DIY Mask With MERV 14 Filter Media.


Refrigerator Water Filters.

Other Promotional Codes


$10 off orders of $75+.

Verified Coupon
4 uses
Last used a day ago
Avg. savings $1.48
#4 Best Promo Code

15% off Coupon

15% off Orders.

Verified Coupon
3 uses
Last used 2 days ago
Avg. savings $0.56
#5 Best Promo Code

What are people saying about Capital One Shopping?

According to Forbes, it's “a game changer.” They also say we’re a “nifty tool” that “may save you a ton of money.” And there are more kind words where that came from - go see for yourself! In the meantime, we’ve rounded up a few of the best reviews here:
  1. Capital One Shopping is “possibly the EASIEST way to save money shopping online,” say the cost-cutting experts over at Million Mile Secrets​. MMS are all about finding ways to save cash by cleverly navigating hotel and airline points systems. They know a deal when they see one! The review praises Capital One Shopping as an “automated and instant” way to get the best discounts, and says our service is “the absolute most effective tool of its kind.”
  2. According to ​NBC News, Capital One Shopping is “a better, smarter way to shop on Amazon.” The author says she has “come to greatly appreciate this browser plug-in” as a way of getting the best deals. NBC News notes that in our era of Amazon-mania every little opportunity to score the best prices can make a huge financial difference.
  3. And finally, Lifewire calls Capital One Shopping “basically free money for very little effort.” They also say we find “more coupons, more often” than our competitors, and says our plug-in is very easy to install and use. Read the full review​ - or better yet, ​get Capital One Shopping now​ and see for yourself how easy it is to get amazing savings on Amazon.