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Air quality

Questions covering indoor and outdoor air quality through the Dyson App.

  • 69 Posts
  • 230 Replies

69 Posts

H
hedgehog13Rookie Member
asked in Air quality

Severe PM2.5, Extremely Poor PM10 reading suddenly

This evening our purifier cooler spiked over 250 on PM2.5 and PM10. I put it on full blast and it’s coming down again but what could have caused this? All we did was a bit of cooking (gas cooker) but that’s not unusual and it’s never spiked to severe before now. Could something have happened to our appliances that caused it perhaps?

3
A
9 months ago
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blockmanNew Member
asked in Air quality

Purifier with different readings when using the front and backwards airflow - Suggestions?

I own a Dyson Pure Hot+ Cool and I’d like to know if my machine is working properly because when I’m using the front airflow it gives me positive measurements for PM 2.5 and PM 10 but the moment I switch to the back airflow it immediately goes from green to very poor.  is that normal? This inconsistent reading is very annoying because you don’t know which one to trust.  anybody else having the same issue?

4
A
10 months ago
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jason23Rookie Member
asked in Air quality

Dyson Air Purifiers not showing graph data in app - Help!

Hello All,We have 2 x Dyson HEPA Cool Formaldehyde purifying fan.Both have and are continually working perfectly for last few weeks. However, since ~12pm Thursday just gone, the graph data in the app has stopped working.I have followed → However, everything else works fine. I can remotely connect to the devices from outside the home. All the numbers show on the app (the various air quality status), I can control both from the app (on wifi and external to the house).  The interesting thing is both devices seemed to have stopped showing graph data at the exact same time.Here a 2 images from 12am last night when I unplugged them, I plugged them back in this morning, 7 hours later. Yes the continuous monitoring is switched on for both units.Any ideas on how to correct this?Thanks 

1
J
10 months ago
H
HardesNovice Member
posted in Air quality

Recommendation - Will Dyson Purifiers cool the room or get the room warmer?

Hello everyone,I am Carl and I live in London and, obviously, the air quality is often very poor. I have an air filtering system that is rather good but not good enough when I go to sleep. That is why I am considering a Dyson air purifierAlso, I cannot bear the heat, and would need an AC. But, as I live in a flat, I cannot install an AC system for our increasingly hot summers. I considered a portable one but my windows are all floor to ceiling and opening in a way that I cannot find any portable AC compatible with my windows or doors. I have fans but they require I open the windows or it becomes too hot, and it’s only a small difference, a breeze of air that is pleasant because it’s a breeze.As I also need a proper air purifier in my room, I decided to check if the Dyson  Purifier HEPA Cool (WiFi) could do both jobs without the need of opening the windows during the night, and waking up to the lovely noise of traffic and construction sites. Would this £549 purifier do the job for a sma

7
Jack
Dyson Community Manager
11 months ago
A
Antonio491New Member
asked in Air quality

Dyson Air Quality Sensor Problem - Any suggestions?

How can the protagonist troubleshoot and fix their dysfunctional Dyson air quality sensor before it exacerbates their allergies and compromises their health?

2
A
11 months ago
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AudreyatNew Member
asked in Air quality

Dyson pure humidify + cool showing consistent bad air quality

My machine has been showing poor or fair air quality for over 24 hours. It has been running at max purify this whole time and will not budge. It usually shows good air quality unless there’s an identifiable source like cooking so this is unusual. It’s in the same room in the same spot it always is and I can’t find any new source of bad air or reason for it. I’ve cleaned the sensors and it hasn’t helped. Please help! Thank you! 

1
A
1 year ago
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MarshafayRookie Member
asked in Air quality

Dyson TP02 reading out the box - 0 deg F and 0% humidity

My Dyson TP02 reading 0 deg F and 0% humidity out of box. I'm suspicious that none of the sensors are working since they are all reading flat lines. Is there a way to reset the device? (Moderation Edit - Tags Added/Updated Title/Category Updated)

2
M
1 year ago
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ConnorTombsRookie Member
asked in Air quality

Dyson AirPurifier always yellow - Any ideas?

Hi there!  I have recently purchased a Dyson AirPurifier formaldehyde. When I first got it, the display was never anything more than the green rating, apart from when I cook. Now for the last few days, I haven’t really seen it in the green rating, it’s now in the yellow… When I now have it on auto, the fan is going at a fast speed. I’m a bit confused as to why my air quality is now worse than before when I’m doing nothing different.  (Moderation Edit - Tags Added)

5
DavidTaylor
1 year ago
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MtoorRookie Member
asked in Air quality

Purifier - In App - Incorrect temperature reading

I have just received my Dyson Purifier Fan and the temperature is reading -2, this is definitely incorrect as the room is around 20 during the day.is there anything I can do other than having to package the whole thing up and arrange it to be returned?  

2
M
1 year ago
C
ChoranNovice Member
posted in Air quality

Formaldehyde/VOCs and baby

We just had a bathroom remodeled (required due to a leak) and are bringing our 13 week old back to the house today. He sleeps in our room which is connected to this bathroom.  I stuck my Dyson formaldehyde in the bathroom and the VOC and HCHO levels shot up to red. After a few minutes the VOC level is at 2, and HCHO is at .027 mg/m3. Is it safe for him to sleep here?  

1
DavidTaylor
1 year ago
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wisedroidNovice Member
asked in Air quality

Purifier - NO2 sensor and humidity

HelloReally happy with our purifier but have found that on auto when opening the nearby outside door the NO2 will always spike to very high for a short period before settling down to normal. This happens consistently and I have read elsewhere that this could be due to the sensor being confused by the significant difference in humidity when the outside air comes in, before stabilising.I do not think there are big sources of NO2 in our garden and it always settles down after some time. Does anyone else have this? If my theory is correct could Dyson correct the software to smooth this kind of spike out as it is annoying when it suddenly goes on full blast! any thoughts welcome :-) 

9
D
1 year ago
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sangerNovice Member
asked in Air quality

Purifier - PM2.5/PM10 Elevated but only at night

Since getting our Dyson TP07 I’ve become fascinated observing the formerly invisible world of air pollutants inside our home. Some observations are easily explained (such as increased levels after frying food) but I’m at a loss as to explain why our PM2.5 and PM10 levels increase every evening before going back to normal in the morning. We run the unit in automatic and it will kick all the way up to 10 for the whole night before going back to 2 or 3 in the morning.The unit is in our living room. We are in a single family home. It is currently winter so the windows are closed all the time. The only thing that happens at night compared to the day is our thermostat automatically decreases the temperature at night. 18C (64F) at night vs 22C (72F) during the day. The furnace fan is set to run continuously (runs even when the furnace is off). The only change at night is the air temperature.Is it possible that the change in air temperature could affect the accuracy of the pollution sensors? I

7
L
1 year ago
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YumikaNew Member
asked in Air quality

Purifier - Is No2 level 4 dangerous?

Hi, I purchased Dyson Purifier Cool Formaldehyde™ TP09 purifying fan 3 years ago.I have indoor No2 level 4 -8 everyday because my next door neighbor burns inscents in and out all day long. When they burn stuff, my dyson machine detects and the dyson app screen turns orange.  And it makes me wonder if its poisonous to be in my home.. I suffer from asthma and hoping this machine will help me breathe better to get rid of No2 level. Is it bad to have level 4 NO2 value everyday? (Moderation Edit - Tags Added/Category Updated)

1
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Gold Level Contributor
1 year ago
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SLVHNovice Member
asked in Air quality

Dyson Purifier Humidify & Cool Formaldehyde PH04 - Machine no longer detects or corrects air quality problems

Bought in 11/29/2021. The app shows when there are problems but the app on machine stays flat always. When the app on my ipad shows there is a problem, I can also smell it, the machine does nothing to resolve the issue. I have a much older model that still picks up and resolves issue. I restarted, replaced all the filters and brought to Dyson Store. Was told it is fine. Said the app is not accurate. Told him my older model still speeds up and resolves issues in the room it is in. He said fine because it passed all the tests. HELLO??? It is NOT working. Any help would be appreciated so much. ALOT of money to invest and not work. :( (Moderation Edit - Tags Added/Moved Category)

3
A
1 year ago
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martindNew Member
posted in Air quality

Accurate air quality measurement

Hi,I’ve recently bought air quality measurement that measures formaldehyde, TVOC, PM2.5, PM.10, CO and CO2 in my apartment. The measuring device was calibrated and it was showing slightly elevated numbers (see picture attached). I would like to confirm these numbers prior to purchasing Dyson device. Can you recommend a device that can measure the air quality in my room? Thanks! Martin  

0
M
1 year ago
S
SheratishRookie Member
asked in Air quality

HP07 - Heating, bad air quality, weird smell, and VOC issues

I have purchased HP07 air purifier few weeks back. I noticed whenever I turn heating mode ON, air quality of my room takes a hit and reaches to very poor in a minute or two and later on it goes to extremes. We get weird smell as well and out of no where machine starts showing VOC as well inside the room whereas in cooling mode VOC is always 0 and AQI is below 30. God knows what is going on, customer support is also not helping. They keep resetting the machine as if it is going to do any good.Just see the difference. One image showcases air quality in cool mode and another image showcases air quality in heating mode :((Edited by moderator – Tags added) 

5
S
1 year ago
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Bellak50New Member
asked in Air quality

Indoor Air - Recording as Bad

Hello!Lately the air indoors using my air purifier is sensing bad air inside my home.  Before it was always green and/or fair.  Now it is poor or very poor.   I live in Texas and I know it is humid and I always have my windows close…so I cannot say anything about it.when cooking always turn on the fans….but I can’t seem to change the air Please help (Edited by moderator – Tags added) 

1
Charliebrown
Gold Level Contributor
1 year ago
Q
qchaldemerNew Member
posted in Air quality

how accurate is the formaldehyde detection?

Hi - I have 2 Dyson Airpurifier Cool Formaldehyde (TP09) and the Formaldehyde reading has been stuck at 0.000 for the past week on both machines.I am very skeptical about the results because an Home Quality expert detected Formaldehyde at my place and I have dedicated devices that indicates some levels of HCHO due my wood floor off-gasing.I have already reseted both devices but the problem persists. Do we have any evidence of the accuracy of the HCHO measure for TP09?Thank you(Edited by moderator – Tags added) 

1
A
1 year ago
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hanzisanoNew Member
asked in Air quality

Constantly fluctuating air quality - Is this right?

The air quality in my room, according to my sensor, has been fluctuating very dramatically and I am wondering if this happens to other people, if there is something wrong with my sensor, or if I just have a serious air quality problem? If anyone has any input on how to interpret this information it would be super helpful! Thank you!(Edited by moderator – Tag added) 

6
K
1 year ago
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Peggy BeNovice Member
asked in Air quality

Purifier - Severe pm 2.5 and pm 10

Hi I have my dyson hot+cool on in my son bedroom .. I'm running some vapour with peppermint and eucalyptus.. is it normal that dyson is detecting severe pm 2.5 and pm 10? 326 ... voc 4.. no2 zero. Thank you(Edited by moderator – Tag(s) added) 

2
A
1 year ago
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YeknomyeknomNew Member
asked in Air quality

can i get notifications about air quality from my air purifier and heater?

The monitor is good but I only remember to look at it every now and then, missing periods of bad air where I could have acted, opened a window or something like that.  Wouldn’t it make sense for a notification to be sent if the air got really bad?  Does this exist?  It can certainly notify me when the filters want replacing so it doesn’t seem out of the question.

2
Gminors
2 years ago
J
JjacciiNovice Member
asked in Air quality

Sudden Chemical Odour?

Been using the hot & cool formaldehyde for months, daily with no issues but out of nowhere it started emitting a chemical like odour. Similar to the smell of permanent marker ink. I didn't pick up where it was coming from for a day or so but determined its definitely from the machine after having it off for a period. My filter is still at least 90% but has it taken in something unusual and been compromised? I don't use chemicals around the machine, the only thing I can think of is maybe some spray hand sanitiser being used in an adjacent room which causes the VOC to rise as I walk past. It doesn't smell spoiled or rancid in any way, but is headache inducing. I've stopped using immediately on realising the issue. (Edited by moderator – Tags added and moved to ‘Air quality’ forum)

3
Stuart
Dyson Community Manager
2 years ago
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Gold Level Contributor
GraceWoodGold Level Contributor
asked in Air quality

My graph data isn't updating straight away

My mum and me share a purifier, we’ve noticed the air quality on the home screen is showing as good, but the graph says its bad, why don’t they show the same? 

6
Stuart
Dyson Community Manager
2 years ago
D
dpleesRookie Member
asked in Air quality

PM2.5 and PM10 Severe readings - Help!

For the past week the PM2.5 and PM10 readings have been off the scale, ie >999ug/m3 (severe) on our Dyson Pure Hot & Cool. We had a decorator in recently but is this normal a week later? We have had windows open and good breeze blowing through but there’s been no change in the reading: it’s still off the scale.  Any ideas anyone?David(Edited by moderator – tags added)   

3
D
2 years ago
P
parablesNovice Member
asked in Air quality

Humidifier - Humidity Issue

Hi Stuart,I read of this on Reddit after opening my new PH04 a few hours ago. At first run, over maybe two hours, humidity climbed from 26% to 28%, and when it dropped back to 27% and stayed, I did a deep clean. I had also already rinsed the pump base cap — and confirmed that the evaporator was wet after that first run. In the hour since the deep clean, using the same settings — humidity target 70%, air flow 10, purify off — I’ve watched humidity slowly climb from 25% to 30%. It’s been some time now since that last jump between 29% and 30%.I hope you won’t mind if I jump in with a few quick questions:The pump base cap — how do you recommend cleaning it, and both its inner (hidden) side and its external side? Is this the only part of the pump base that should be cleaned? to paraphrase a piece of advice from Reddit:  if, after a run, the evaporator is wet, the unit is not defective; in fact, it’s trying the hardest it can. True? I’m running this in the middle of a very small living room

6
B
2 years ago
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