AirDoctor

AirDoctor 3500i

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AirDoctor AirDoctor 3500i

Overall

#246 in

Air Purifiers

according to Reddit Icon Reddit

User sentiment67% positive
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Top Pros

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Last updated: Apr 6, 2026

Reddit Reviews

Reddit Icon54317a 0.2
r/moderatelygranolamomsAny recommendations for a good air purifier for smoke at the moment?
2 months ago

i love our AirDoctor! the units go on sale occasionally but the filters unfortunately never do. it works extremely well for smoke, cooking odors, regular dust/particulates. i’ve had mine for 3 years and have had zero issues with it. you can vacuum the first filter ever month (or more often if needed) and then there’s a carbon filter and hepa filter that are replaced at different intervals depending on air quality.

Reddit Iconacoolbeancounter 0.2
r/moderatelygranolamomsWhat is the best HEPA home air purifier that's actually worked well in your opinion?
6 months ago

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.

Reddit Iconaejanoff 0.2
r/AirPurifiersDoes your air purifier really remove odors?
6 months ago

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.

Reddit Icona_girl_has_no_nameee 0.2
r/moderatelygranolamomsWhat's the best quality air purifier for home you've ever used? Have you found a noticeable difference?
7 months ago

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.

Reddit Iconbaconblzer 0.2
r/homeownersHow many have air purifiers running nonstop?
about 1 month ago

I have two air doctors and a Winix running 24s

Reddit Iconehatnotay 0.2
r/moderatelygranolamomsBest air purifier ??
6 months ago

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.

Reddit IconFantastic_Fall_1277 0.2
r/moderatelygranolamomsNew To Air Purifiers - What's The Best One To Get?
29 days ago

We hated our air doctor because it started to short out our outlet and the filters are so insanely expensive to replace. They’re also hard to find and only available through their website (with no free shipping). We sold ours and purchased a Winix from Costco, works great and came with three replacement filters

Reddit IconFunkandFreedom 0.2
r/moderatelygranolamomsBest air purifier for reducing dust and allergens in a kid’s room?
5 days ago

We use the air doctor in our main living space and Blue Air for bedrooms! Open to hearing if there are better alternatives now though as ours are a few years old now (with replaced filters of course).

Reddit IconJewFuser 0.2
r/BelgianMalinoisNeed a new vaccum/air purifier?
3 months ago

airdoctor is by far the best and they are having a sale right now!

Reddit Iconjsilva298 0.2
r/HomeWhat's the best air purifier for home you've used? Worth it or Scam?
12 months ago

We've had an Air Doctor on our main floor for many years and its legit. crazy the amount of stuff we find in the first front filter.