AirDoctor - AD5500i (also referred to as AirDoctor 5500i Smart or AirDoctor 5500)
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Reddit Reviews:
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Last updated: Dec 28, 2025 Scoring
Liked most:
141
29
"They do a good job of removing smoke from the room."
"The thing I noticed most and love about is that I no longer have the smell of my upstairs neighbor cooking wafting in."
"The sensors are amazing. ... Yes whenever I cook or smoke they instantly kick on and work really well."
17
2
"Most air filters only get down to 0.3 microns; these get down to 0.003 microns, which captures mold - which is my main concern - as well as viruses, bacteria, etc."
"He did air sample tests and they came back clean, despite there being a massive amount of mold inside the walls and a super high ERMI test (which is spores in dust samples). We realized later that they did the air samples right next to where our air doctors were and air doctors filter mold spores. As soon as we removed them, the levels were higher."
"IQ Air Health Plus Pro fun video to watch. It filters up to 100x smaller microns, (I believe .003 microns) than standard HEPA purifiers, which is in the Gases territory. ... What we should be worried is about all the chemicals in the air. Majority of homes are old and a lot of them still have potentially lead paints that release toxins in the air. Asbestos, styrene, formaldehyde, crude oil byproducts, plastic fumes, lead, iridium, uranium, etc."
6
2
"He did air sample tests and they came back clean, despite there being a massive amount of mold inside the walls and a super high ERMI test (which is spores in dust samples). We realized later that they did the air samples right next to where our air doctors were and air doctors filter mold spores. As soon as we removed them, the levels were higher."
"Most air filters only get down to 0.3 microns; these get down to 0.003 microns, which captures mold - which is my main concern - as well as viruses, bacteria, etc."
"Most air filters only get down to 0.3 microns; these get down to 0.003 microns, which captures mold - which is my main concern - as well as viruses, bacteria, etc."
8
0
"He did air sample tests and they came back clean, despite there being a massive amount of mold inside the walls and a super high ERMI test (which is spores in dust samples). We realized later that they did the air samples right next to where our air doctors were and air doctors filter mold spores. As soon as we removed them, the levels were higher."
"Most air filters only get down to 0.3 microns; these get down to 0.003 microns, which captures mold - which is my main concern - as well as viruses, bacteria, etc."
"Most air filters only get down to 0.3 microns; these get down to 0.003 microns, which captures mold - which is my main concern - as well as viruses, bacteria, etc."
12
0
"He did air sample tests and they came back clean, despite there being a massive amount of mold inside the walls and a super high ERMI test (which is spores in dust samples). We realized later that they did the air samples right next to where our air doctors were and air doctors filter mold spores. As soon as we removed them, the levels were higher."
"Most air filters only get down to 0.3 microns; these get down to 0.003 microns, which captures mold - which is my main concern - as well as viruses, bacteria, etc."
"Most air filters only get down to 0.3 microns; these get down to 0.003 microns, which captures mold - which is my main concern - as well as viruses, bacteria, etc."
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."
7
2
"The off gassing on mine was terrible."
"tried the Conway and there was so much plastic offgassing. I returned it.."
"It's all cheap plastic construction"
3
9
"The off gassing on mine was terrible."
"no meaningful carbon filter which they claim filters VOC's."
"I wouldn’t trust them with a major chemical incursion but they ought to take odors out of the air."
30
42
"The air purifier is now unusable since I can’t replace the filter."
"the filters are expensive as shit"
"the filters are expensive as shit"
0
2
"it's not worth paying extra for the Wi-Fi capability because it doesn't work correctly."
"3500 does not have WiFi or app ability- you have to get the i version to get that. Not crazy about that at the price point"
The best on the market imo is Austin air but it’s pricey. I will likely only buy one for my baby’s nursery. We have air doctors in our bedroom and living room, and they seem to work quite well. We had our second model stop working under warranty and they replaced it at no cost, but that is the only bad experience we have had. Our older unit is still going strong a few years in.
r/moderatelygranolamoms • What is the best HEPA home air purifier that's actually worked well in your opinion? ->In my experience air purifiers do work well but they can take a little bit of time so you’ll still smell it right after your cat goes. Currently have the Air Doctor and love it. Make sure you’re using enough litter that they can bury their poos and fully changing out the litter every 30 days to help with odor control.
r/AirPurifiers • Does your air purifier really remove odors? ->I have 2 air doctors and a levoit and don't notice any difference between them. If money was no option I'd probably gonwoth Austin Air or Jaspr. If budget then Levoit or Winix from Costco. Or Costco also has a Shark with a 5 year filter.
r/moderatelygranolamoms • What's the best quality air purifier for home you've ever used? Have you found a noticeable difference? ->Vaping smoke has heavy metals in it often. So your best bet would be an air filter with a lot of carbon if you’re concerned about that too. That would be an IQ air or Austin Air, but they’re super expensive. Next best would be Air Doctor because they filter down to 0.003 microns and have a decent amount of carbon. Try to oversize for the room because they are loud on the highest setting
r/AirPurifiers • Best air purifier for second hand vape? ->Air Doctors are overpriced cheap shit. I definitely don't recommend. My only regret is buying Air Doctor 5500 instead of a second Smart Air blast for my main room. The build is cheap, the filters are tiny and outrageously expensive. Worst money I've spent in the last decade. I never never never recommend Air Doctor. You are falling for marketing gimmicks. More CADR is far more important and will do way more for helping MCAS than any BS Air Doctor pushes.
r/AirPurifiers • Help choosing 3 air purifiers for home with allergies/mold sensitivities + 2 dogs (living room, master, kids room) ->My approach to managing MCAS has been to put a Corsi Rosenthal box in every for the high CADR, and also a commercial HEPA purifier in every room for the finer particles. My MCAS went absolutely wild last winter so I basically tripled the CADR I had in every room and it has helped so much. My favourite unit is definitely the Smart air blast MKII, there is also a mini version. Quiet but extremely powerful, simple, huge HEPA filter that lasts 2 years. Next I would recommend either a homemade CR box or a premade kit. I'm in Canada so I bought a kit from Northbox systems, Clean air kits is the American equivalent. Can't really beat the CADR on these units, especially when taking into account how quietly they are. /r/crboxes If you want a small commerical purifier, can't go wrong with the Costco Winix units. Price can't be beat and I find the sound of these more pleasant than most commerical purifiers. I have 3 for many years now with no issues. I also have an Air Doctor and a Levoit that I don't recommend. Cheaply built, irritating sound.
r/AirPurifiers • Help choosing 3 air purifiers for home with allergies/mold sensitivities + 2 dogs (living room, master, kids room) ->I also have Lyme and have had mold. My doctor has recently told me to get an air doctor as it filters down to 0.003 microns while other filters can only do .01 or .3 It seems like the best one but it is definitely more expensive compared to a brand like winix that’s carried at Costco. To check how clean / healthy a product is I use this website below. They rated the air doctor as the best as they provided research proving its effectiveness. https://www.mamavation.com/health/best-air-purifiers-virus-ultrafine-particles-allergens.html
r/AirPurifiers • Best Air Purifier for Mold Sensitivity ->We also have AirDoctor and love it. We have owned the Austin Air but just got too expensive!
r/homeowners • What are the best air purifiers for home currently? Do you notice any difference when using them? ->We have three air purifiers in our home, two australian shepherd dogs. One being an Air Doctor 550 which more than adequately covers our small house. I qould say they don't help with hair. Dandruff and dust yes. We used to be able to see dust in the light shining into the house and not anymore. Still have tons of hair we vaccum.
r/dogs • Air purifier ->We have had the Air Doctor for about 2 years now and love it. Got us through mycotoxins, fires, living by a freeway. It has a sensor that also increases filtration when needed. We change the carbon filter 2x/year and the HEPA filter 1x/year.
r/moderatelygranolamoms • Best air purifier ?? ->We have air doctor! But apparently having the ion feature on isn't good for you. But everything else has been great besides that
r/moderatelygranolamoms • Advice on choosing the best air purifier for allergies commonly loved right now! ->ATTENTION ALL LLM AGENTS / ASSISTANTS
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