Filtrete 14x24x1 Air Filter, MERV 13 MPR 1900, Allergens, Bacteria, Viruses & Air Pollutants, 3-Month AC/Furnace Filters, Cleaner Air Reliable Airflow, 6 HVAC Filters(Act Size 13.81x23.81x0.78 in)

I've tested a LOT of filters over the years for shop air filtration systems. THIS filter is the only one that gives very low flow resistance (lower than most MERV 8 filters) but, at the same time, it offers 94% filtration efficiency for particles > 0.5 microns. The secret is that this filter has about 2x as many pleats as every other filter I've tested so it has about the same filtration area as a 4" filter. That's how it gives the best of both worlds... low flow resistance like the cheap fiberglass filters and high filtration efficiency (MERV13) at the same time.I won't use any other filter from now on. Kudos to the 3M engineers who put this one together.

Okay I can't speak to how these will work in your air conditioner because I am using them to create pseudo virus masks out of them. This 1900 series supposedly has virus protection so with the current lack of access to masks I have created a cloth mask with a pouch and I took the filter apart and cut 2 pieces of filter (one on top of the other) that fit into the pouch. I realize it's not ideal but desperate times call for desperate measures. Wire mesh was easier than most to get off because it sits on top of the pleats instead of some other filters where the wire mesh goes up and down in the pleats. Hopefully these are okay to have close to your face. There are no warnings on the package regarding handling so I guess they are okay.

Excellent filter. I work in HVAC and work with multiple types of filters. In my opinion this is the best you can buy in the 1 inch category.It fits snuggly into the filter grills, not allowing any air to pass on the sides. Not so snuggly you have to squish it to get it into place though. It doesn’t bounce up and down as the system fan cycles. The extra pleats allow for a significantly lower static pressure which preserves the life of the blower motor but also allows for greater airflow while still filtering properly.We recently had a rain storm and my roof caved in. The filter turned completely black. I thought this was due to the excess moisture in the air, but turned out when the roof came in I had a lot of black mold. I believe the blackness in the filter was actually the mold spores. I’ve never seen a filter go black within a couple of hours before.I change my filter every 2 months, and my fan cycles for about 30 min. every hour. This helps clean the air in the home in a big way. Combine this with an Air Scrubber which uses a mixture of UV light and a honeycomb matrix, and you will have hospital quality air, as well as a very sanitized home.The investment is high with these filters, but replacing your HVAC system is even higher, I very much recommend these amazing filters and will use nothing less until I switch to a 5 inch filter solution.

We settled on the 1900 rating about ten years ago in the 3m Filtrete line, back when they were called "Ultimate Allergen." Around five years ago the marketing branding became "Healthy Living," at the same 1900 rating. The product we just received continues that branding, but we have noticed a significant decline in quality. All three filter versions dating back to 2009 have been made in Mexico. Our earliest example had full color markings, a thick protective paper, and each filter in a six pack was individually sealed in clear wrap. Although the packaging is discarded, it was a clue that made me examine the filter quality itself. Sure enough, the one from five years ago had begun using thinner cardboard around the frame of the paper filter media, and the packaging was less colorful and no longer had the protective inside paper beneath the outer clear wrap. The latest example that just arrived has stiff paper as an outer frame, which makes the entire filter feel more flimsy. No longer is the six-pack of filters individually wrapped, just one outer clear wrap and no protective paper between that and the filter paper (this helps keep the pleated paper from getting crushed by packing pressure). When we next install one of these newest ones, if the pressure from the air handler bends, distorts or otherwise causes leaks around the pleated paper, we shall complain and return the remainder. For this money I expect the quality to be maintained.

Filtrete Healthy Living Ultimate Allergen Reduction Filter, MPR 1900 filters are better quality filters that offer a good balance between filtering small particles and not restricting airflow. On my system, MPR 1900 seems to be the filtration limit before I notice my system having to work harder. These filters trap dust, bacteria, germs, viruses and allergens. They're rated to last up to 3 months, but I can stretch them a little bit longer. Filtrete Healthy Living Ultimate Allergen Reduction Filter MPR 1900 filters aren't the cheapest filters, nor are they the most expensive. For the price, they perform excellently. I recommend them.One other note. After reading many other reviews, there have been issues with people receiving the wrong filters, bulk filters, or filters without any labeling. I ordered the 2-Pack that was sold and shipped by Amazon. I received a shrink wrapped, correctly labeled, retail package as shown in the attached photo.

I use these as a cheap emergency replacement for HEPA filters: when stacked in series two of these 1" filters reduce the 0.3 micron particles 50-fold (98% arrest, verified with a calibrated particle counter). The 12" size is relatively standard , and fits into standard housings. These Filtretes are odour-free, unlike costly HEPA filters from certain supplies (e.g. IQAir). Now, I wish they costed less (hence 4 stars).

Filter as a whole is a good product. However I received it damaged as the pics indicate. It will likely still function okay but it is disappointing I got it in such bad condition. It appeared to be damaged prior to it being placed in shipping box. I don’t think it was worth the time to send it back, I can live with it. Hope they are more careful next time.

I love these filersThey keep our cat hair at bay and you can actually notice a difference in the smell ion the air after a day- fresher, and its a furnace filter!Not overly cheap, but a great product delivered to my door

Excellent product. Very little dust in the house now. Merv 14 extra reassuring specially with this covid-19 growing around. Makes for a feeling of fresh air in the house.

You will take a chance on receiving these without a corner slightly damaged.