r/AirPurifiers

Hello all

My 11yr old son struggles with allergies CONSTANTLY. We live in Houston Texas where pollen is always high. I've never owned an Air purifier (sad to say considering our situation) and I'm currently to find a good one. Each time I think I've found the perfect Air purifier I find out later that it has horrible reviews. I just need one for his bedroom that filters for pollen, dust, mold with a budget of $150. I don't know the square feet of his room. It's just medium sized. Any recommendations would be greatly appreciated. Thank you all.

Many air purifiers incorporate pelleted carbon granules.

Any carbon dust that may be created from the granules (which might happen if they are, say, jostled together during transport) is a health hazard if inhaled.

Thus it makes sense that most of the purifiers that incorporate carbon pellets put the carbon upstream of a HEPA or other particulate filter, which can then capture such dust. These include the Winix 5510, Coway Airmega ProX, IQ Air Health Pro Plus XE, AirPura (various models) and Austin Air Healthmate.

A notable exception, however, is the Alen Air Breathesmart series, which have no particulate filter downstream of the carbon. I.e., instead of prefilter/carbon/HEPA, they're prefilter/HEPA/carbon.

Presumably Alen Air knows what it's doing. But then again, so should Winix, Coway, IQ Air, AirPura, and Austin Air, all of which take the opposite approach, seemingly for good reason.

Thus is there any reason to be concerned about Alen Air's design? Any idea why they did it this way?

Note1: I'm referring specifically to pelleted carbon. I don't expect this would be a concern with bonded carbon filters.

Note2: I bellive the Oransi AirMend also doesn't have a particulate filter downstream of its carbon filter, since it's my understanding you can choose either their HEPA or their carbon filter, but not both. I'm not sure about the AllerAir models, or the BlueAir Signature.

Hi everyone,

I’m looking for a new air purifier and I'm stuck between two options. Because of a sale and some vouchers, they are currently priced almost the same for me:

• Coway AP-1512HH (Mighty): €140 (Sale + €60 voucher).

• Xiaomi Smart Air Purifier 4 Lite: €150.

My main concerns:

1. Noise levels for sleeping: I plan to use this in a bedroom (approx. 4.5m x 2.5m). Which one is quieter on its lowest setting? I need it to be whisper-quiet while I sleep.

2. Performance vs. Convenience: The Coway is well-known for its high CADR (421 m3/h) and solid reputation, but it has no smart features. I use Homebridge, so with the Coway, I’d be limited to a smart plug (On/Off only).

3. Smart Integration: The Xiaomi 4 Lite has a slightly lower CADR (360 m3/h) but integrates fully with HomeKit via Homebridge. This allows me to see PM2.5 levels and adjust fan speeds or set automations (like "Night Mode") directly from my phone.

The Coway seems like the "stronger" machine on paper and is a very established model, but the Xiaomi offers way more control.

For those who have experience with either: how is the sleep mode/lowest fan speed? Does the Coway's extra power outweigh the lack of smart controls at this price point for a room this size?

Thanks for the help!

My bedroom is 1680 ft^3, and thus needs a purifier with 1680/12 =140 CADR to give 5 ACH.

The problem is my bedroom is very quiet (it's below the 30 dB floor of my sound meter), and I'm a light sleeper, so I'd like a HEPA13 purifier (or combination of purifiers) that would come close to that CADR without raising the noise floor. And I'd like it to have some pelleted carbon filtration.

Thus far I've tried the Coway Airmega ProX (170 CFM on silent mode), BlueAir Signature (125 CFM on sleep mode) and Winix 5510 (55 CFM on sleep mode). Of these, only the Coway provides sufficient CADR, but only the Winix is sufficiently quiet. [Though it just developed a clicking sound on sleep mode, so I'll need to exchange it for a new unit.]

At this point, it seems my best bet is to use two Winix 5510's, which would give me 110 CFM. Since less dust is generated when you're sleeping (right?), I'm guessing that should be enough.

But I'm open to alternative suggestions.

Location: USA

It seems like this is a known issue, but I can’t find anywhere that confirms what it actually is. I’ve seen it stated that the smell could be some sort of volatile organic compound left over from the purified air, I’ve seen others state that it is something to do with the materials used to make the filter, or that it is the filter itself. Is anyone aware of any consensus on this? Is it dangerous? It is a strong smell. Will it go away? Should I exchange/return the unit?

NYC, 10x10 room, looking to filter for allergens. Purchased from Amazon. Coway airmega 100.

Why do I not see anyone talking about this model? There's no videos about it or anything. I get that it came out pretty recently but no first impressions? it looks like a more modern version of the 1512hh. Also what are the chances it goes on sale as the low as 1512hh?

Is it good for my room?

Thinking of picking one of these up, housefresh review is good, just wanted to check if anyone has any opinions on this?

I'm looking to purchase an air purifier for my small apartment, specifically to help with dust / smoke for my asthma and allergies.

Country: Australia

Room volume: Lounge / Kitchen = 3.45m x 7.1m, hallway 1.10m x 1.65m, bedroom 3.33m x 3.63m with 2.7 m ceilings. Total = 104 m³ roughly. (Bathroom / Laundry doors remain closed except when airing out the apartment, so I haven't included them.)

Filtration needs: Dust, smoke, odours, occasional VOCs, some allergies.

Budget: I would like to aim for around $500 but can go higher if needed.

Not sure about yearly cost $1-200 I guess. If non-crappy filters were available somewhere like taobao / aliexpress I'd be happy to purchase them from there. (this doesn't include the electricity costs, cheaper would be nice, but I'll just pay whatever fixes my issues really.)

Some of the Air Purifiers I've been looking at are below, but I would like recommendations from more experienced people.

ZERO+ PRO 5-stage Air Purifier - 470m³ per hour.

Blueair Pure Max 3650I Air Purifier - 697m³ per hour.

Samsung AX5500 Air Purifier - 467 m³ per hour.

Thanks in advance.

I have a blueair 311+max plus a dyson air purifier running and I can't get rid of these smells that the builder says is "non toxic!" Help! I just ordered another shark. I open the door periodically but it's south Florida so I'm blowing hot humid air in. (800 sq ft)

Hello, I want to buy an air purifier and I need a recommendation.

I want to keep it in the bedroom, where I also have my desk, where I sometimes read or work on the computer. I also have clothes there, and a clothing rack with clothes on it.

The idea is that I have quite a lot of dust in the room, even though I don’t air it out very often. I would also like it to have a carbon filter, to remove odors, perfume, deodorant, popcorn, etc.

The room is around 25–30 m². I have 2 cats, and sometimes you can notice that they leave a bit of hair around the room.

The models I’m considering are:

Philips 1000i - CADR 300 m³/h

- Pros: It is the most powerful and fastest, and it could run on a lower setting. It has a carbon filter. Maybe best choice!

Cons: The filters are more expensive, but it’s not a problem to change one every 10–12 months at most.

Philips 600i - CADR 170 m³/h

Pros: It is small, doesn’t take up much space.

Cons: It does not have a carbon filter, it will probably need to run at the highest speed, and it likely won’t handle cat hair and dust as well as the others.

Philips 800i - CADR 190 m³/h
Pros: It is small, doesn’t take up much space, and it has a carbon filter.
Cons: It will probably need to run at a higher speed, medium or high (but not disturbing).

Levoit Core 300S - CADR 240 m³/h

Pros: It is small, elegant, and has cheaper filters than Philips.

Cons: It will probably need to run on a higher setting (which is fine since I’m not home during the day). From what I’ve heard, it won’t capture dust very well (which is what I mainly care about), and it will take longer to clean the air compared to the 1000i.

What do you think, what would you recommend for everything mentioned above?

I'm debating between the Austin Air Immunity, Bedroom or Healthmate Plus. Can someone with any of them help me decide? Is it worth it to go with the Immunity or will I be fine with the Healthmate Plus? I realize this is subjective but would love to hear your own personal experiences.

Room is about 700 sq ft. Need to filter VOCs, car exhuast/pollution. I already have an IQAir Healthpro Plus but it doesn't seem to deal with VOCs/car exhaust as well. Also, it sucks air from the bottom and the Austin one sucks air from 360 degrees so I'm curious if that will work better for me. Open to your thoughts. THanks!

I just started experiencing lots of coughing, watery eyes, trouble breathing and I think it’s because my dog and I share my bed. (He is a 17 lb Pomeranian, 3 year old) This is my first experience owing a dog and I’ve heard an overwhelming amount of air purifier options. I’m a sucker for old school American made products that last a life time… I’m wondering why it’s rare I see anything about Filterqueen, is it cause this product is so good that there’s no need to talk about it? Or cause it’s an older brand and not a lot of people my age (33) even know about it? Advice will be greatly appreciated.

Their website has had the replacement listed as out of stock for a few months now. If they don't make them anymore, should I just buy a knockoff on amazon?

• Your country of residence: Europe.
• Each room or area's volume, in cubic feet or cubic meters. (You need at least one purifier per room or area.): 30 m² (323 ft²).
• Your filtration needs: e.g., pollen, dust, cigarette smoke, VOCs, cooking odors.: The main goal is to get rid of hookah smoke and odors.
• Startup budget.: $1-1.5k.
• Yearly budget (electricity + filters).: $300 I guess.

My main goal is to remove hookah smoke and odors from my apartment - 30 m² (323 ft²). as quickly and effectively as possible, prevent the smell from spreading to other rooms, and, of course, just clean the air of dust and other pollutants. As I understood that the main factors for this are a high CADR and a good carbon filter? I’ve spent a lot of time researching different models and have narrowed it down to Daikin and Sharp, specifically these models:

• Daikin MC80Z - around $900
• SHARP KI-TX100EU-W - around $1500

I’m not sure if I should pay extra for Sharp or stick with Daikin. Maybe you could suggest some other interesting models? AlsoI like the ionization feature in an air purifier because it makes the air feel fresher and gives it a pleasant smell.

Humidification isn't a necessary factor, because I plan to buy a humidifier separately