Due to Hurricane Sally, our standard shipping time will be delayed and could take up to 2 weeks.

MERV, MPR, and FPR air filters: What’s the difference?

MERV, MPR, and FPR are rating systems for air filters. Each will help you understand the quality of air passing through your home.

And the first thing to understand about each is that they are not for different kinds of filters. They’re just different ways of comparing the same filters.

Here’s a quick look at each of the three rating systems.

MERV, the industry standard.

MERV stands for Minimum Efficiency Reporting Value. And like all of the filter ratings, it helps us understand what kind of filter we have.

MERV was established by ASHRAE: The American Society of Heating, Refrigerating and Air-Conditioning Engineers. But despite the name (“American”), this is actually an international standard, covering over 130 countries worldwide.

MPR, created by 3M.

3M is a massive company, and they have tens of thousands of products. They create everything from clear tape to deodorant to medical supplies.

MPR stands for Microparticle Performance Rating, and it’s their proprietary rating. We show below how it compares to MERV and FPR.

FPR, for Home Depot products.

FPR stands for Filter Performance Rating. And it was created by Home Depot. All of the filters they sell have FPR as their rating system.

But really, FPR is not much different from MERV.

And, as is the key with all of the three filter ratings above, it’s important to remember: they’re all talking about the same filters. You can equate it to talking in different languages. Different words with the same meanings.

So, how do the different ratings compare?

The below graph will allow you to compare apples to apples. Or, filter-rating-systems to filter-rating-systems!

Which should you get?

As you can see from the above chart, if you’re careful and get the right filter for your home, you can get by with any rating

system. As shown above, they’re all comparable.

But at Filter King, we sell MERV.

There’s really no need to use a proprietary rating when it’s not an industry standard (like MPR or FPR).

MERV, on the other hand, is the international standard for air filters.

And, because of that, we’re able to off over 200 different odd-sizes that you won’t be able to find in stores.

That means, whatever size air filter you need, we’ve got you covered.

Just use our super-easy custom filter sizing tool to find the right match air filter for your home.

And, of course, if you have any questions along the way, feel free to call or message us. We’re here to help!

Or if you’d like to read the latest reviews on some of our most popular filters, you can find those here:

In each review, we explain who that filter is optimal for, and if it’s a good match for you.

Oh, and when you buy anything in our store, be sure to use the coupon code 5off to save $5.