Membrane SolutionsMSA3/MSA3S Genuine Original Air Purifier Filter Replacement 4 Pack, Upgraded 4-in-1 H13 True HEPA Filter with OdallerPure Technology,

I was needing new filters for my Air Purifier and these fit perfectly and work great. A little bit pricey but worth it to have clean air

They are a little pricey but It keeps my home odor free. I purchased another brand without the chip, what a headache. Lesson learned. You get what you pay for.

I made sure I was buying a genuine replacement filter for my MSA unit. Non-genuine filters will NOT work. This may have to do with some magnet built into the filter. Note, you have to power the unit off, remove the used filter, install the new filter, power the unit back on, and then hit the reset button for a few seconds until it resets.My previous filter lasted 4-5 months. I have a long-haired cat, and I live in a small studio apartment where there is a lot of dust from the road I am facing. I am also asthmatic and very sensitive to dust and allergen particles in the air, so my body can tell! As a result, I leave the air purifier running 24/7 on it's medium (2-bar) fan speed setting in my living room area. I am very happy with how easy it is to swap out the filter, the durability of the filter, and quality of my indoor air.It's less messy to change out an all-in-one filter, and probably far better - in my opinion. I was using a Honeywell air purifier before with a separate "main" and "pre-filter" and I feel that those things needed to get swapped at the 4-5 month mark, even though the machine would state just the pre-filter needed changing.

Great product. Works like a charm

Filters do not smell the same as the originals that come with the unit, which is unfortunate. Still a great filter and an awesome product.

I have purchased this filter several times now. Each one fits nicely and lasts about a month.They are very easy to replace too.I will continue to purchase this filter on a monthly basis!

This is the third filter I have ordered for my air purifier. My purifier works great and so does this filter. I highly recommend.

I have been running our air purifier pretty much nonstop for well over a year maybe even a year and a half. Every replacement filter I get within a month or so has way more than I ever expected to have, but I shouldn’t be surprised I have two dogs and three people in the house.The filter does a GREAT job, but does anyone else have issues where after a month or so you notice a plastic smell coming from the outgoing air? It’s clearly the filter because if I take it out and run the unit without it in there’s no more from the exhaust side. It’s ether the carbon or the plastic on the back side that smell.