Aerostar 16x20x4 MERV 13 Pleated Air Filter, AC Furnace Air Filter, 6 Pack (Actual Size: 15 1/2"x19 1/2"x3 3/4")

I purchased Aerostar MERV 13 filters in the 20x30x1, 14x30x1, and 12x12x1 sizes for my HVAC systems. As a point of comparison, I have always used 3M Filtrete filters in the red packaging. These either have a 1000 or 1085 MPR rating, which would be closer to a MERV 11 rating. Here are some things to note:- Each Aerostar filter was clearly labeled with respect to its nominal size, actual size, and MERV rating. No brand information is printed on the filters.- In all cases, the Aerostar filters have the same or more pleats than the 3M filters. Also, both the wire and paperboard framing for the Aerostar filters are more substantial than the 3M filters. Lastly, the Aerostar filter media just appears to be denser than that of the 3M filter, as it lets less light through. In theory, I'm expecting the Aerostar filters to perform best unless there is some more subtle difference in the filter media.- Irrespective of the actual dimensions printed, the Aerostar filters are always between 1 to 3mm smaller in each dimension compared to the 3M filters.- When installing the 3M filters, I have always found them slightly oversized such that I usually have to crush a filter's frame a bit to get it mounted. As a result, it is doubtful that any air can bypass the filter and the only way the filter moves is if I tug it firmly to remove.- When installing the Aerostar 20x30x1 filter, it remained snug to the vent frame and did not fall from the ceiling even with the HVAC fan off and grate open. If the filter was jiggled a little, it would fall though. In other words, it wasn't tight like a 3M filter.- When installing the Aerostar 12x12x1 filter, it did not stay snug to the vent frame. I had to slide it in and close the grate to keep it in place. Despite this, I haven't heard any filter movement when the fan turns on or off.- When installing the Aerostar 14x30x1 filter, it was similarly snug to a 3M filter.If a problem develops with any of the filters, I think I'll just use double sided tape to secure them as necessary. I am satisfied with this given how much I saved over buying 3M filters.- For reference, the actual dimensions printed on the 3M filters are 501mm x 755mm x 20mm, 349mm x 755mm x 20mm, and 298mm x 298mm x 20mm. In comparison, the actual dimensions printed on the Aerostar filters are 502mm x 756mm x 19mm, 352mm x 759mm x 19mm, and 298mm x 298mm x 19mm. Irrespective of the printed dimensions, the real world dimensions, as explained above, don't exactly match the specifications.- The 20x30x1, and 12x12x1 sizes were shipped directly from Amazon, while the 14x30x1 size was shipped from Air Filters Delivered. The filters shipped from Amazon were received in perfect condition as they were double boxed. The filters shipped from Air Filters Delivered were slightly battered and deformed.

I recently had a chance to install these in my own home. I have a single return that measures 12x24, on a 2 ton Package unit. I know that this will only allows for 600 cfm of the required 800 cfm the system needs to operate properly, I just haven’t gotten around to enlarging it yet.Now that, that’s out of the way.. in regards to the filters, they are properly rated as the air the travels through them will be filtered properly. Unfortunately as others have mentioned they are undersized for a 12x24 return grill. I was expecting them to be a little undersized, but they are very undersized. So undersized in fact that my return grill whistles now. The whistling is coming from the edges of the filter, which means air is passing around the filter and not being filtered at all, I will be removing these filters and installing something that fits snuggly, and doesn’t allow the air to pass around them.I’m really not sure what the thinking was when designing these, if the whole purpose of a filter is to filter ALL of the air that returns to the system, then the filter should fit properly. 12x24 is a common size, and the manufacturer should have known and tested there filters to make sure to size them properly. MERV 13 doesn’t mean anything if air can get around them. I’m fairly disappointed, I was excited about having great air filtration, since I just installed the system, this is a variable speed system, and the whistling was noticeable in low speed, I haven’t tested in high speed, but I imagine it will be even worse, based on experience.

We used this product to make n-95 style filters for masks for myself and other hospital staff during the Covid 19 outbreak when medical supplies are in short demand. Thank you for the great price. I was paying $20 for a single comparable filter!

The filter was not even covered in plastic. It was literally exposed completely to the allergies and pollen as there was no cover at all. The entire purpose of buying these filters was to filter out allergies that I am allergic to. They are completely worthless and I had to order something else as these are nothing but trash. I am extremely frustrated and will never again order from this dishonest seller. This product advertised as reducing allergens in specific amounts and it is can not do that when both sides are exposed to allergies and once used, the allergens on the back would flood the air. It is not as advertised. I strongly recommend that people not trust this seller and I will not be buying anything from them again.

These are wonderful. Everything that I was hoping for. I love that they're Merv 13 ( The standard rating for filter quality. Standard residential equals 1 to 4, better residential equals 5 to 8, superior residential equals 9 to 12, and hospitals is 13 to 16. A level 11 MERV filter can be expected to remove 60 to 65% of dust particles) I would buy a level 16 MERV filter if I could, but any sort of superior residential filter is difficult to find and often not worth the cost.I bought these to go into the 12x24 air inlet. I purchase the after market register covers from Lowes and self installed. What an amazing upgrade. We went from one filter on the furnace to two register filters (these) and the furnace unit. I would recommend this simple DIY and these filters to anyone.We've been doing construction on our home and I've been replacing these monthly. Our first month we had a good handlful of dust. So happy we avoided having that in our air and our new furnace.We will absolutely be repurchasing these in the future.

This is not a Merv 13 filter- filter material is thick and furry - not even close to filtration capacity of a Merv 13. (I had another Merv 13 from Costco for the furnace so am certain this filter doesn’t meet Merv 13 standard/appearance. I was hoping to use this one for medical masks). Sad that sellers are taking advantage of the pandemic to make a profit on inferior products - when lives are at stake.

They are better than the Merv 11- they have a couple more pleats - making them have more material and folds. The only problem is that unlike the real expensive 3M -don't last quite as long. I get a month out of one- but only got a month and a half out of a 3M as I have severe allergies and they hardly look the slightest bit dirty when I change them out. They are so much more affordable. As of these size issues- I don't see much of an issue- tiny difference. I use a pinter's tape on the edge - taping it to the frame and always have with other filters to keep it in place.

Como tal, cumple especificaciones. Se confía en la calidad. De observación, si es del interés para armar un cubo de Corsi-Rosenthal (popular como alternativa de purificador de aire, en tiempos de pandemia), sugeriría los de 2 pulgadas de grosor. Desde luego, los de 4" son más aparatosos, pero creo que estarían sobrados para uso doméstico.

You should use a MINIMUM MERV 8 in your furnace for better living. I changed out my furnace filter and in 2 weeks it's already black. There's a lot of stuff in the air you breathe in your house.I was also looking for replacement filters for my Sharp FPP40CX, so I bought the MERV 13 for my FPP40CX, I cut them in half for a perfect fit with foam tape on one edge for a perfect seal.Add a foam prefilter for air conditioners on top to catch more dust and longer lasting filters before changing.I hope that helps for people looking for replacement filters for their Sharp FPP40CX or other sharp units.

I have been buying filters for long time for various properties.This is unpresentable, unprofessional.How bad does it get?They asked me to remove negative review for full refund otherwise charging restocking fee $26.Plus shipping $38, cost me ~50% to return low quality product.AVOID!!!

I don't believe these ones are true MERV 13 - I counted the pleats compared to the one I removed -and sure enough less pleats, therefore less filtrations, less material. Some of the wire was cut. One filter had bends in the pleats. I had this brand before- was it the supplier trying to pass off less than perfect ones? They were pretty good about returning them and refunding.