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Air quality

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

81 Posts
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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

23717

1 year ago

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)

7691

1 year ago

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)

8703

1 year ago

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

2550

1 year ago

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)

13245

1 year ago

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)

3451

2 years ago

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)

4841

2 years ago

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)

40462

2 years ago

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.

6782

2 years ago

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)

78023

2 years ago

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?

10826

2 years ago

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) 

12613

2 years ago

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

44916

2 years ago

Anonymous

asked in Air quality

App air quality data blank

Up until Sunday night my app was working fine.Since Monday morning it seems my machine isn't recalling any indoor air quality data.Does anyone know how I can fix this?

8054

2 years ago

kristinNew Member

asked in Air quality

HP02 goes to Poor quality in heat mode

I run my HP02 hot cool link on auto normally, but when I turn on heat mode it will suddenly leap to Poor or Very Poor air quality in a matter of minutes! There is also a burning smell coming from the Dyson. I still have plenty of filter life according to the app.I know that it is generated by the Dyson because when I turn off heating mode, let it cool off for a while, run my other purifiers (and wall heater) for a while it slowly reduces back to Good air quality.This has happened multiple times! From the first few months of ownership til now.I have done the usual troubleshooting such as vacuuming and cleaning the sensor. I’m 99% sure it’s caused by the Dyson heat mode and coming from the Dyson itself. I just don’t use it in heat mode now and use my home’s built in wall heater. Do I have a faulty machine? Should I use the warranty?(Edited by moderator – tags added) 

3641

2 years ago

lorynRookie Member

asked in Air quality

What data source(s) are used to report external air quality in Australia

I’m located in a outer suburb of Melbourne, Australia, and am wondering how accurate is the reported outdoor air quality. Anyone know what data source(s) Dyson relies on to produce these statistics?

GHann5New Member

Hi all, on the purifier app, I'm genuinely curious as to where the local outdoor air quality data is measured. I can't imagine it's actually that local. Thanks

6691

2 years ago

lindsaytmadgeRookie Member

asked in Air quality

VOC produced by Dyson at lvl 10

Hi!We had our machine constant at lvl 10 for quite some time to help our baby sleep. One day I came into the room and it smelled like burning rubber or something definitely not normal. VOC was high, obviously. We turned off the Dyson for a few days. Now, we have the Dyson on auto, however, it occasionally spikes back to high and then to fair. Prior to all this- our Dyson was always on green. Is our machine broken now?(Edited by moderator – tags added)

6353

2 years ago

StuartStuart - Dyson

published in Air quality

How Air Quality changes throughout the year

While air pollution is an issue all year round, different seasons see an increase in certain pollutants due to various factors such as temperature, climate, and human activities.SpringSees invisible pollen particles, from trees and grass, can travel for miles sticking to clothing and hair and triggering allergies. In certain regions, fine sand or dry soil particles are blown up through the sky by spring winds and spread through the atmosphere before falling to the ground.SummerSummer is prime time for renovation, but as a result, the colourless gas, formaldehyde, can be released from some forms of furniture, insulating materials, paints, and varnishes. Applying personal care products, such as insect spray, can cause VOC levels to spike, while BBQ can give rise to Nitrogen Dioxide (NO2) and particulate matter like PM2.5. In addition, some air conditioners remove humidity from the air as a natural by-product of cooling, which can impacting comfort within the home. Autumn Brings colder we

15090

2 years ago

dioncwNew Member

asked in Air quality

never goes below “FAIR” even with constant purification. Does anyone know how to fix this?

My HP09 never goes below “FAIR” even with constant purification. Does anyone know how to fix this? I’ve vacuumed the sensors. It didn’t do a thing. Thanks in advance for your help

5912

2 years ago

Lweb423New Member

asked in Air quality

Normal Air Quality Readings

I keep my Fan on AUTO mode. Is it normally to run at level 1 pretty much 24/7? Is it possible okay if it gets up to level 4 for a little bit, twice a day?(Edited by moderator – tags added) 

6041

2 years ago

DustBegoneRookie Member

asked in Air quality

air readings? all 0 since reset

I had a issue with my new (purchased last week) HP09 (Heat/Cool/Purifier) where it wouldn’t connect to WiFi on the Unit side (WiFi was animated indicating trying to resync) and in the app (showing not connected). It was showing connected on router side viewing router logs. No issues with WiFi even at the location of the unit (RSSI was 54dBm and download/upload speeds were 220Mbps/21Mbps at location of unit). The only thing that fixed the issue was deleting in app, resetting unit to factory and repairing. However, since adding back to the app ALL READINGS (Voc, PM2.5, PM10, No2 and HCHO) are 0. Prior to the rest there were times the PM2.5, PM10 and VOC were 0 and every once in a while increase to 1 or 2 so not unusual they are 0. And NO2 has only been 0. However the HCHO is 0.000 which is strange because the one week I had it it’s always been low but not all zeroes I think it was like 0.0010 on average. It’s almost like none of the readings are reporting since deleting and resetting eve

11042

2 years ago

jarredNew Member

asked in Air quality

Air quality graph not showing and innacurate temperature

Hi I just purchased my Dyson Purifier Cool Formaldehyde however the air quality graph on the machine is not showing and the temperature shown is accurate. screenshot below from app to show discrepancy between indoor stats and outdoor.

25875

2 years ago

DustBegoneRookie Member

asked in Air quality

HP09 Gives off VoCs in Heat Mode?

I just purchased the HP09 Dyson Formaldehyde Heat/Cool/Purifier. I’ve noticed that when I turn on heat mode the VoCs increase from 1-4 going from good air quality to Fair air quality. Is this normal? Maybe because it’s new? I’ve definitely linked it to the heat mode as with it off for a few hours the VoCs improve then mins after I turn on the heat mode the VoCs jump up. If it is because it’s new how long should it run before that goes away? I know when you have the heater off for several months and you turn on the first time their is a odor, maybe it’s something like that? Anyone else experience this issue?

7643

2 years ago

ExteriousRookie Member

asked in Air quality

sudden peak of airqualiry pm2.5 and pm10

5502

2 years ago

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