Aerostar 20x20x1 MERV 8 Air Filter, 4 Count, ACTUAL SIZE (19.75 x 19.75 x 0.75), HVAC, Air Conditioning & Furnace Filter Captures Dust, Lint & Pollen (MPR 600 / FPR 5), Made in USA

Bought these for my in-laws as my mother in law has tons of breathing issues (COPD, asthma and allergies) they have a little furball who sheds and even though they clean they accumulate dust quickly. They were using a very low merv rated filter prior to this and I have noticed a difference in their indoor air quality since the switch. They just had a new unit installed and I want them to get the best bang for their buck and their health. Super easy to use - has arrows to show you which way for air flow, and they fit like a glove! Great value in comparison to the big box stores as well! This will also help increase efficiency as it’ll trap smaller particulates from going beyond the filter.

Easy installation! Excellent product never realized there was so much dust in my house. I always use a slightly inferior product but this is the best product I've used! Will definitely buy more and have! Excellent for allergies, pet hair and dust. The image I submitted is only after 2 weeks.

I’ve been using the Aerostar 20x20x1 MERV 8 filters for a while now, and they’ve consistently delivered excellent performance for my home HVAC system. The build quality is solid—each filter feels sturdy and well-made with no loose pleats or flimsy edges. What really stands out is the balance between airflow and filtration efficiency. The MERV 8 rating is perfect for most households—it effectively captures dust, pollen, lint, and other common airborne particles without putting unnecessary strain on the system. Since switching to these, I’ve noticed less dust around the house and fewer allergy flare-ups. The six-pack bundle is also a great value. It’s convenient to have enough filters on hand for regular replacements, and the price per filter is much more affordable than buying individually. Installation is straightforward; they fit snugly in my standard 20x20x1 slot with no air gaps. Another plus: these filters seem to hold up well over their expected lifespan (about 2–3 months per filter depending on air quality and usage). Even in high pollen season, they maintain good airflow until it’s time to swap them out. Overall, the Aerostar MERV 8 filters are a dependable, cost-effective choice for anyone wanting cleaner indoor air without overspending. Highly recommended for routine home use!

These filters are fair quality but the cardboard framing isn't very strong. They are good for the price.

These filters are awesome! I got the 20x20x1 size, and they fit perfectly in our ceiling vent. As soon as the AC kicks on, it pulls the filter right into place nice and snug. Super easy to pop in — took maybe 10 seconds. I’ve noticed way less dust floating around, and it seems to help with my seasonal allergies too. The filters feel sturdy and well-made, not like those flimsy ones that bend when you install them. The 4-pack is great too because I can just grab a new one when it’s time to swap it out. They also look really nice and clean. No bends or warps. Very sturdy. For the price, these are honestly a great deal. They do their job, fit right, and keep the air cleaner. I’ll definitely keep buying these.

Looks fine so far. Delivered in a perfectly in-tact box. 20x20 fit my ceiling mount return perfectly. Fairly sturdy two sided support. My house is 90 years old, drafty and dusty, and we have a dog and allergies, so I generally replace every month. Went with the Merv 8 for all those reasons. Just replaced the furnace, so I will definitely continue to do so. This is a decent price for a 6 month supply. In the photos, the old brand (Merv 5) doesn’t have the double sided support. Saw on Youtube University that double sided support was better because it puts less drain on your system by making it less likely it will get sucked further into the return hole. The old one is dirtier than normal because it was over a month. I finally took my time researching to find the best functional fit for my system instead of grabbing the first/cheapest thing that met the measurements.

The Aerostar 20x20x1 MERV 13 filters have been great for my DIY air scrubber project. I used them to build a simple setup, and it surprised me how well it cleans up the air in the room. Dust and little particles that used to hang around don’t seem nearly as bad now, and the air just feels fresher overall. The size works well for building around, so it was easy to fit into a basic box-style design without a lot of fuss. With a pack of six, it is easy to swap them out when they get dirty and keep the scrubber working well.

These work very well and catch a lot of dirt.

Fits perfectly , feels as good quality if not higher than the regular 3M brand that sells for twice the price.

These are better quality than the basic Garrison brand accordion filters available from Canadian Tire and are certainly worth an extra couple bucks each. They are sturdier and less susceptible to warping under the pressure of a continuous fan.

Can’t beat the price. As a pet owner I make sure to change my filter every month and boy can I see the difference. The filter does surely catch a lot of allergens and dust. When compared side by side with a new one it’s quite amazing.

Filters work well. I use these in my garage where I do woodworking and it collects a lot of sawdust. Noticeable difference within first day of use.

would purchase again