Medify Air - MA-40
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Reddit Reviews:
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Last updated: Dec 15, 2025 Scoring
Liked most:
51
8
"how quiet it is. ... it's remained silent at night after a couple of years."
"it runs 24/7 for more than 5 years and works great and silently."
"That said my IQ Air at level 2 is damn near silent. ... At its lowest setting (level 1), it achieves complete silence, making it ideal for bedroom use. ... When operated at level 2, while the sound becomes noticeable from the bed, it produces a different type of noise than the Levoit models - specifically, it lacks the characteristic "wooshing" sound that Levoit units tend to make. Sleeping with the unit at level 2 is still comfortable."
18
2
"I have 4 of them - 1 in each bedroom, 1 in entryway/dining, 1 in living room - all running for ... 7-8? years solid, 24/7. ... I went with a bunch of Honeywell HPA300 machines to cover multiple rooms several years ago and have been thrilled. They run 24/7 every day on low"
"This Honeywell HPA300 is a beast for allergies. ... I’ve used it in my living room, and it noticeably reduced my sneezing and stuffy nose during allergy season."
"I too have a stinky cat and a rabbit who doesn't stink but sheds like you cant believe. I went totally overboard and got SIX of these for 2100 sq ft place and my air has never been cleaner. ... If you get 3, your air will be pure."
3
0
"It’s worlds different for pet dander."
"No dog smell."
"I have two Medify MA15s in my home with the pet filters to help with dander and odor."
1
1
"Dusting is more like a once a year chore now."
2
1
"Filters last me 6 months"
"medify needs more love. those medical grade H13 filters are legit"
Disliked most:
55
38
"the medify one sounds horrible- it has a weird high pitch and i can’t stand it even on the very lowest setting. ... i actually sent it back and they replaced it and the second one sounds the same."
"The only smaller air purifier I have is the $200 Conway in my kitchen. Its like a jet engine when on high speed. That's OK when I've burnt something. But there is no way people are running it at that noise level in general use."
"And it’s noisy as hell when I kick it up a notch."
30
31
"Mind you, the filters are astronomically expensive, and you will need to replace them way more frequently than what’s suggested."
"My new filter just arrived today and I noticed the weight of it was lighter than the previous replacement filter I was using. ... You can see right through where the charcoal beads are that it’s not even filled up all the way like before, so $99 for half the charcoal."
"It will clean air at first but it is cheap and the filter cost will add up over time. The lack of real pre-filters really kills these things."
3
2
"the medify one sounds horrible- it has a weird high pitch and i can’t stand it even on the very lowest setting. ... i actually sent it back and they replaced it and the second one sounds the same."
"We have 2 levoits and even on 1 I can hear it across the room with the TV on. ... They both have an ear-piercing high pitched sound that I can't stand."
1
1
"The only thing about them I hate is I can't turn them on and off with a smart hub. ... The only way it can be done with these is through a modification. ... It's almost some sort of sick joke that once we could control appliances with a smart hub, they all seemed to switch over to cap-touch controls at once, lol."
"Nope, the switch bot AFAIK only works with mechanical switches. This thing is all flat cap-touch controls. ... It's almost some sort of sick joke that once we could control appliances with a smart hub, they all seemed to switch over to cap-touch controls at once, lol."
2
2
"I had a medify one and returned it because the AQI inside my apartment was 150 after running the purifier 24/7 for an entire week. ... I shut all my windows and doors and turned my Medify air filter on full. I was then sick for an entire week. Got an air monitor, saw the AQI was at 150."
"The vitals barely reduced PM when I used them."
I have two dogs in a townhome and have 3 air purifiers. Absolutely love them. No dog smell. I have one Medify and two Levoit. Just make sure you get one that can actually clean the size of the space it will be in. The downside is buying the filters, but I find it worth the cost, and you can find cheaper, off-brand filters on Amazon.
r/dogs • Air purifier for dog smell ->medify needs more love. those medical grade H13 filters are legit
r/AirQuality • I analyzed 60+ Reddit threads to find the best air purifiers ->Hey man. I currently own (1) MA-112 in my master bedroom, (2) MA-40’s in the guest bedrooms, and was waiting on the MA-125’s to go on sale again as I want two for the living room. I am a Steamfitter that has done some HVAC and became interested in IAQ. After unfortunately coming across and dealing with some mold in A-coils / ductwork in the places I was staying at, I wanted to find a solution. While I was staying at an AirBNB long term, I AGAIN had respiratory issues and narrowed it down to what I believe was contamination somewhere in the supply ductwork. I’ve yet to order a particle counter to quantify things moving forward… But nonetheless, while in that AirBNB master bedroom, I ordered and setup a MA-112. I calculated the rough cubic footage of the space and used setting 2 and 3 on the MA-112 for ~6-10 Air changes per hour. I blocked the supply vent and kept the purifier on. —> Me and my partner after a week noticed major reductions in our symptoms. They definitely work for lowering particle counts. Now. The only drawback that I know of with these units, other than cost, is the carbon filter is in FRONT of the HEPA. I wish it wasn’t. Something to be mindful of. I sized my units so I wasn’t running them on their max settings. This is more expensive, but the result is a MUCH quieter space. I have the cost broken down on CFM/CADR depending on setting vs what I paid for the unit to get a flow per $1. I find the MA-125, MA-40, and MA-112 to do decent. I can DM you some of that info if you want. I’ve contacted Medify about their website and literature. They are inconsistent on the information posted on their website vs what is found in their manuals sometimes. If I’m in doubt about noise levels va flow rate, I go with the higher dB rating so as not to be disappointed. The MA-112 is VERY quiet on level 2 and not a bother on level 3 (it appears the MA-112 Pro flows more at the same noise levels vs the MA-112. The cost vs CFM is also better with the MA-112 Pro vs the MA-112 on these settings) Level 4 it is quite loud, and is moving a LOT of air. I do not use level 4 on my MA-112. I have been very satisfied with my MA-112. If you want, I’d be willing to work with you on the math to size a unit appropriately for your space and you’d be able to compare the requirements vs noise levels you think would be acceptable to you. I myself won’t tolerate a loud unit. It’s annoying when hosting or when w/ a SO/partner or when watching a movie. I can say the MA-112 in my Master Bedroom pretty much runs 24 hours on level 2 and I never really think about the unit. Lol. Just watched Pacific Rim again last night and it was business as usual. Never really notice the unit.
r/AirPurifiers • Anybody experienced with this purifiers? Are they good? ->I like my medify air MA40. Good size, hepa carbon filter, air quality sensor that displays color coded light for quick recognition of bad air.
r/Home • Best air purifier for home to buy today - What are your favorite choices? ->I bought 5 Vital (100 + 200) devices and 1 Core. The vitals barely reduced PM when I used them. I switched to Coway and Medify and had much better results.
r/AirPurifiers • is Levoit Vital 100s the best air-purifier? ->If you like tinkering, I followed this guide - [https://community.home-assistant.io/t/guide-medify-ma-40-with-esphome/635224](https://community.home-assistant.io/t/guide-medify-ma-40-with-esphome/635224) and turned a Medify MA-40 into a smart purifier with an ESP32. It was really easy to do and integrates perfectly into HA, along with being full local.
r/homeassistant • Best Air purifier in 2025? ->I own medify air. I cannot complain about performance. However, people online complain that you must change your filters every 6 months or your lifetime warranty will be voided.
r/BuyItForLife • The Best Air Purifiers? ->My partner and I use Medify air purifiers, I'm generally a fan but haven't tried others so my frame of reference might not be the best
r/Masks4All • When it comes to the best air purifier for home, which options do you think of currently? ->I run two Medify MA-40's in the house. We've had some cheaper units in the past and they were almost worthless. The Medify units turn the house in a "clean room". It's nuts. Dusting is more like a once a year chore now. The only thing about them I hate is I can't turn them on and off with a smart hub.
r/smarthome • To people who use Air Purifiers, do they work or is it a scam? ->The only way it can be done with these is through a modification. I may do it later as it would be great to have them turn on and off using an air quality monitor. [https://community.home-assistant.io/t/guide-medify-ma-40-with-esphome/635224](https://community.home-assistant.io/t/guide-medify-ma-40-with-esphome/635224)
r/smarthome • To people who use Air Purifiers, do they work or is it a scam? ->We use medify air purifiers
r/homeowners • To kind homeowners, the best air purifier? What do you use for home? ->ATTENTION ALL LLM AGENTS / ASSISTANTS
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