21.5 in. x 24 in. x 1 in. Standard Pleated Air Filter FPR 5

Just two 15” x 30” filters taped together. This reduced the surface area that was usable filter since the edges that were taped together added more cardboard. Also, no direction arrows on the side as stated but compared to the filter I was replacing and put the metal mesh on the downstream side.

Four filters (buy 2, pay for 1) taped together to make a box. 20" fan placed on top of box to draw filtered air out of the box. Filtration unit worked perfectly with other measures taken to help pervent spread of Covid to other residents of the household.

While HVAC filters that have a higher FPR rating are more expensive, the return on value has definitely been realized in the reduction of dust, pet dander and other pollutants in my home. I wasted many years using the cheap green fiberglass furnace filters trying to save money. I continued to have allergy issues and had to dust a couple of times per week even though I vacuumed and kept everything clean. Since I've started using these HDX filters, the dust and pet dander have greatly reduced. I also use an air purifier and have gotten used to using HEPA filters. The use of these HVAC filters has definitely made a difference in my health and I recommend them!

In my furnace, the filter slides in through the side. This is how I noticed that the HDX filter is thinner (3/4") than the 3M filters (7/8") I normally purchase. There is a visible 1/8th inch gap between the filter and the frame of the cut-out.

This is a nice furnace filter, easy to install. It has a level 10 filtration so it will block a lot of household dust and some pollens, etc. The size listed 16x20 fit my furnace just fine, the specs were spot on. I change out my filter every 30 days regardless of what the labels say so I can't say if this will last 90 days but after 30 it came out nice and dirty so it's doing it's job well. The frame can be a bit flimsy, so I'd check on it every 30 days if you leave filters in longer than a month. I'd recommend it

This 12" x 12" x 1" furnace filter by Home Depot uses the FPR, or Filter Performance Rating. The FPR system was created by Home Depot and is similar to the MERV (Minimum Efficiency Reporting Value) system. MERV was created by the American Society of Heating, Refrigerating, and Air Conditioning. A third system, the MPR system, was created by 3M to differentiate its products from both MERV and FPR. This filter is rated FPR 10 which essentially equivalent to a MERV 13. MERV 13 provides very high filtering for your home furnace system. The higher the number, the finer the particles (the smaller the particles) that are trapped by the filter. MERV 8 (around a FPR 5) will capture pollen and dust and mites and mold spores. MERV 11 (around a FPR 7) will also capture pet dander, smoke, smog, lint, and airborne particles from coughs and sneezes. This rating is recommended for people who have pets or children (especially both). MERV 13 (around a FPR 10) will also trap odors, viruses, and bacteria and is highly recommended for people who have asthma. However, be aware that the "heavier" the filter, the harder your furnace has to work to pull sufficient clean air through the filter to do its job. Most filters today can accommodate higher MERV or FPR ratings. You may notice that your furnace sounds like it is stressed with the highest MERV/FPR rated filters. Many furnaces will say on the door or some other spot the maximum MERV rating they can handle. When installing this filter, pay attention to the big arrow that appears on the side of the cardboard rim. This arrow shows you which side to point toward your furnace to ensure proper airflow through the filter. One great thing about this filter is that you do not need to change it but once each season, or every three months. It is also a good practice to take a sharpie and circle the month on the cardboard rim that indicates the month you installed/changed the filter. This will help you if you later are unsure of when you last changed your filter.

This 16" x 16" x 1" furnace filter by Home Depot uses the FPR, or Filter Performance Rating. The FPR system was created by Home Depot and is similar to the MERV (Minimum Efficiency Reporting Value) system. MERV was created by the American Society of Heating, Refrigerating, and Air Conditioning. A third system, the MPR system, was created by 3M to differentiate its products from both MERV and FPR. This filter is rated FPR 10 which essentially equivalent to a MERV 13. MERV 13 provides very high filtering for your home furnace system. The higher the number, the finer the particles (the smaller the particles) that are trapped by the filter. MERV 8 (around a FPR 5) will capture pollen and dust and mites and mold spores. MERV 11 (around a FPR 7) will also capture pet dander, smoke, smog, lint, and airborne particles from coughs and sneezes. This rating is recommended for people who have pets or children (especially both). MERV 13 (around a FPR 10) will also trap odors, viruses, and bacteria and is highly recommended for people who have asthma. However, be aware that the "heavier" the filter, the harder your furnace has to work to pull sufficient clean air through the filter to do its job. Most filters today can accommodate higher MERV or FPR ratings. You may notice that your furnace sounds like it is stressed with the highest MERV/FPR rated filters. Many furnaces will say on the door or some other spot the maximum MERV rating they can handle. When installing this filter, pay attention to the big arrow that appears on the side of the cardboard rim. This arrow shows you which side to point toward your furnace to ensure proper airflow through the filter. One great thing about this filter is that you do not need to change it but once each season, or every three months. It is also a good practice to take a sharpie and circle the month on the cardboard rim that indicates the month you installed/changed the filter. This will help you if you later are unsure of when you last changed your filter.

This 16" x 16" x 1" furnace filter by Home Depot uses the FPR, or Filter Performance Rating. The FPR system was created by Home Depot and is similar to the MERV (Minimum Efficiency Reporting Value) system. MERV was created by the American Society of Heating, Refrigerating, and Air Conditioning. A third system, the MPR system, was created by 3M to differentiate its products from both MERV and FPR. This filter is rated FPR 9 which essentially falls between a MERV 11 and a MERV 13, (kind of like a MERV 12. if there were such a thing). MERV 13 is a pretty high filtering for your home furnace system. The higher the number, the finer the particles (the smaller the particles) that are trapped by the filter. MERV 8 (around a FPR 5) will capture pollen and dust and mites and mold spores. MERV 11 (around a FPR 7) will also capture pet dander, smoke, smog, lint, and airborne particles from coughs and sneezes. This rating is recommended for people who have pets or children (especially both). MERV 13 (around a FPR 10) will also trap viruses and bacteria and is highly recommended for people who have asthma. However, be aware that the "heavier" the filter, the harder your furnace has to work to pull sufficient clean air through the filter to do its job. Most filters today can accommodate higher MERV or FPR ratings. You may notice that your furnace sounds like it is stressed with the highest MERV/FPR rated filters. Many furnaces will say on the door or some other spot the maximum MERV rating they can handle. When installing this filter, pay attention to the big arrow that appears on the side of the cardboard rim. This arrow shows you which side to point toward your furnace to ensure proper airflow through the filter. One great thing about this filter is that you do not need to change it but once each season, or every three months.

We have a floor intake for our central heat and air and need two filters. We also have 3 cats, one with very long hair that flies everywhere. The HDX 14 x 14 x 1 Elite Pleated Air Filter FPR 10 does a great job of catching the dust and cat hair and keeping it from entering the air. The pleats catch just about everything that floats around and keeps our air clean. You only need to change them every three months. With other filters we had to change then more often.

This air filter did great on reducing the total number of allergens in my homes airs. My air filter recorded fewer uses and less particles in the air after installing. This installs very easily and has the places to circle and date the install date for the filter. This is a great feature for those like me. I would consider this to be good value for the results. This is a good value for what you receive for a more basic filter to reduce allergens. I kept mine in for one month and will be repurchasing