AMERICAN-MADE MERV 8 AIR FILTERS

GUARANTEED TO FIT

TL;DR

MERV 8 is the standard choice for most homes. It captures up to 90% of large airborne particles, including household dust, lint, pollen, mold spores, dust mite debris, and pet dander. Filterbuy cuts, pleats, and frames every MERV 8 filter to order in our US facilities, offering over 600 standard sizes plus custom options. Always check your HVAC manual to confirm the maximum MERV rating your system can handle safely.

Key Takeaways

• MERV 8 is the standard tier on the MERV scale, rated for healthy families and most homes. It captures 90% of airborne particles.

• MERV 8 is comparable to MPR 600 and FPR 5. MPR and FPR are third-party rating systems while Filterbuy uses the industry-standard MERV rating system.

• MERV 11 is for allergies and pets, MERV 13 for smoke and Odor Eliminator for odors.

• Order by nominal size, the rounded number printed on your current filter. The filter we cut is slightly smaller, and that clearance is what lets it slide in.

• Check your HVAC manual to confirm which rating your system takes.

What Does MERV 8 Mean On An Air Filter?

MERV stands for Minimum Efficiency Reporting Value, the standard national scale used to measure an air filter’s ability to capture particles. MERV ratings range from 1 to 16 for residential and commercial use; higher numbers indicate finer filtration.

A MERV 8 rating means the filter is designed to capture standard home pollutants without restricting your heating and cooling system’s airflow. While shopping, you may also encounter brand-specific scales like 3M’s MPR (Microparticle Performance Rating) or The Home Depot’s FPR (Filter Performance Rating). A MERV 8 filter performs equivalently to an MPR 600 or FPR 5.

Before you settle on a rating, check your HVAC manual to confirm which one your system takes. It's a quick fit check, the same as confirming a size.

MERV 8 Vs. MERV 11 Vs. MERV 13

Filterbuy makes all three ratings, plus Odor Eliminator. Each one has a job.

MERV 8 is the standard choice for most homes. MERV 11 is the superior tier, made for allergy sufferers, and it's the one to look at if you have pets or you notice pollen. MERV 13 is our optimal tier people choose for smoke. Odor Eliminator handles odors.

Whichever you choose, check your HVAC manual first to confirm which rating your system takes.

Which MERV Rating Should I Choose?

Start with what's in your house.

Then check your HVAC manual to confirm which rating your system takes, and order that.

If someone in your home has a health condition you're trying to manage, talk to your doctor about it. We make filters, and that's a question for a qualified professional.

How Do I Find My MERV 8 Filter Size?

Finding your size takes about a minute. Pull the old filter out and read the size printed on the frame, then order that. If there's no old filter, measure the slot.

That printed number is the nominal size, and it's the one you order by. The filter we cut runs slightly smaller on purpose because that clearance is what lets it slide into the slot without binding.

We stock 600+ standard MERV 8 sizes, including the ones most homes use: 20x20x1, 16x25x1, 20x25x1, 16x20x1 and 14x25x1. If yours isn't listed, we cut custom sizes to the eighth of an inch.

Filterbuy MERV 8 Filters

We cut, pleat and frame every MERV 8 filter to order in our own US plants. We make what we sell and offer 600+ sizes, plus custom options. 

How Often Should I Replace a MERV 8 Filter?

Replace it every 90 days in a typical home. Change it more often if you have pets, a large household, or a stretch of heavy dust in the air.

Not sure whether yours is due? Hold it up next to a white sheet of paper. If it reads gray against the page, change it. That test takes five seconds and it beats guessing.

Auto-delivery ships your size on a schedule you set, so you don't have to remember.

What Does A Year Of MERV 8 Cost?

Buying a multi-pack brings the per-filter price down, and auto-delivery brings it down again. Both cost less over a year than buying one filter at a time.

Check Every Return Before You Order

Plenty of homes have more than one filter. There's usually one at the furnace or air handler, and often a second behind a return grille in a hallway or ceiling. Some homes have both, and the two are frequently different sizes.

So walk the house before you order. Each grille with a filter behind it needs changing on the same schedule. If you're not sure where to look, our guide to finding your HVAC air filter location covers the usual spots.

Where To Buy MERV 8 Air Filters

Buy direct from us at Filterbuy.com. We offer fast and free 2-day delivery to most US states.

Looking for MERV 8 air filters nearby? Big-box stores tend to stock a dozen or so common sizes. We stock 600+ and cut custom sizes to order, so you can get the size that fits your system.

Why Buy From Filterbuy

We cut, pleat, and frame filters to order in our own US plants, and ship them directly to you.

We make air filters every day, so we know the category well. When we cite outside experts like the EPA or the American Lung Association, we link directly to the source so you can see the information for yourself. 

Have questions? Our support team is at (855) 345-8289. Breathe better with Filterbuy MERV filters.

Supporting Statistics

Two findings from federal and public-health sources on why the filter in your return duct matters.

1. Indoor air is often dirtier than outdoor air. The EPA reports that concentrations of some pollutants run 2 to 5 times higher indoors than outdoors, and Americans spend roughly 90% of their time inside.

 Source: EPA, Indoor Air Quality, Report on the Environment.

2. More than 90% of US homes carry three or more allergens. NIEHS measured eight common allergens in nearly 7,000 bedrooms, the largest US study of its kind. Over 90% of homes had three or more detectable allergens, and 73% had at least one at an elevated level. 

Source: NIEHS, National Institutes of Health.

Filterbuy manufactures air filters. Both figures above belong to the organization that published them, at the links.

Frequently Asked Questions

Is a MERV 8 filter good enough for my house?

For most homes, yes. MERV 8 is the standard tier, and it captures 90% of airborne particles, which cover household dust, pollen, lint, mold spores, dust mite debris, and pet dander. Check your HVAC manual to confirm which rating your system takes.

What's the difference between MERV 8 and MERV 11?

MERV 8 is our standard tier and captures 90% of airborne particles. MERV 11 is our superior tier, made for allergy sufferers, and captures 95%. MERV 11 is also the one to look at for pets and pollen.

Which MERV rating is best for a furnace filter?

Whichever one your HVAC manual says your system takes. Furnace filters and AC filters are the same filter in a forced-air home, so the rating you choose for one is the rating for both.

Why is my 20x20x1 filter not actually 20 inches?

Nominal size is the ordering name, and the filter is cut slightly smaller by design. That clearance is what lets it slide into the slot. Order by the nominal size printed on your old filter.