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Air quality

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

  • 57 Posts
  • 195 Replies

57 Posts

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getparuNew Member
asked in Air quality

PM 2.5 increases When Fan Speed Increases - Why?

I have a Dyson TP04. I have recently noticed that the PM level shown in the display increases when the fan speed is increased. For example, when the fan speed is at 1, the PM 2.5 displayed is around 25. But when I increase the fan speed to 10, the PM 2.5 is around 60-65. Using an external air quality monitor, I find the PM level to be around 40-45. What could be the reason? Any suggestions on how I can sort this out.

3
R
Bronze Level Contributor
2 days ago
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andycNovice Member
asked in Air quality

Detecting Antibacterial Spray - Data Missing

I am happy with my Dyson HEPA Purifier TP09 Formaldehyde Purifying Fan however, when testing it using Dettol Antibacterial Cleaning Spray, it doesn’t seem to detect anything.Surely it should detect antibacterial spray as it has nasties in it and I thought would affect the air quality?The purifier detects other sprays such as dry shampoo spray, just surprised it didn’t detect the antibacterial cleaning spray.Would be grateful for any advice.Thank you,Andy 

4
A
3 days ago
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serda88Novice Member
asked in Air quality

Why is my ph01 not detecting cigar smoke?

We own ph01 machine that we purchased in 2021 and we moved to a new apartment where the neighbor under us smokes quite a lot during 6:30-7:30 in the morning and 21-22 in the evenings on her balcony under us. We have cats so they like spending their time outside on balcony, otherwise we would just keep it closed.The problem is that dyson does not even register or reacts to cigar smoke/smell. This morning we could smell it in the whole apartment and that’s what woke us up as it was quite bad while dyson, which is sitting next to balcony doors did not change the speed of fan or anything while in auto mode. NO2 levels remained the same during the whole “incident” where they should be shooting through the roof.  We cleaned the filter/particle detector thing, removed dust from filters, cleaned the whole machine but PH01 just stays in idle mode. We are really running out of ideas

5
S
5 days ago
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bitahajimiriNew Member
asked in Air quality

Can I run the air purifier continuously?

How long can an air purifier run continuously ? should I run my air purifier 24/7?How often should i run my Dyson purifier humidify+cool formaldehyde ? Can i leave my air purifier on all day and all night?

1
Shaqeela.Isaacs
Community Moderator
1 month ago
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crookesaRookie Member
asked in Air quality

Air quality will not improve - Severe 999 reading showing

We have an Dyson Pure Hot+Cool Advanced Air Purifier which we purchased in 2019 and has been working fine. Lately we set it to cool at night and everyone morning we come down and the fan is at full power. We’ve also been away for a week and for the whole week it was at full power to clean the air. We recently replaced the filters from the 2 piece set to an all in one part as supplied by Dyson.  As you can from screenshots it doesn’t seem to improve the quality. What can be done to stop it always being on high and the air quality not improving. I have a feeling it might be a sensor or something as nothings has changed in our home.  Thanks for any help.   

4
C
1 month ago
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jimkeirNovice Member
asked in Air quality

Dyson Purifiers - Auto cooling and fan speed

In cooling+auto mode, it seems the HP09 fan speed is driven entirely by air quality. Is there no way to have ‘auto’ control the fan speed based on temperature? I know there’s no active cooling but setting the fan speed based on user-defined lower and upper limits would be very useful. i.e. the fan goes from 0 at 20 degrees to 10 at 30 degrees.

9
J
1 month ago
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JacobW1New Member
posted in Air quality

Purifier with a Humming Noise. How can I stop this?

Dear All last summer saw the arrival of a heatwave that was set to break all records. Due to the nighttime temperature increasing I purchased a fan HEPA formaldehyde and honestly saw a measurable improvement. Packed away for the winter and then unpacked in June this year when we had a few hot days and nights and it’s as if I have a different product. It’s intrusive- it greatly affects the acoustics of my TV. It makes a humming noise at night time not immediate (but wakens me up after 90mins and I now hate it. Last week I slept in for a medical appointment as I couldn’t hear my alarm clock as it drowned out the noise. Can the community help? Dyson you are impossible to get hold of! This monster has greatly damaged my sleep pattern.I have resorted to my trusted Dyson air multiplier as it was basic and did what it was supposed to do.Dyson can I sell it back to you please?(Moderation Edit - Tags added/Title Updated)

1
DavidTaylor
1 month ago
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An44444Novice Member
asked in Air quality

Air quality discrepancy between Outdoor Air Quality and indoor reading. Is there a way to fix this?

As you can see my air quality is reading “fair” but in the graph it never reads as “fair” it’s reading as “good”. This means I’m not able to track it over time or see how often it’s actually turning on. How do I fix this? Why is this happening?? 

10
J
1 month ago
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FlorenceNovice Member
asked in Air quality

Formaldehyde Cool Purifier doesn't improve air quality especially VOCs

I’ve already returned one Formaldehyde Cool Purifier mainly because it gave the same high readings of VOCs every night whether it was on, off or in auto mode.  I ordered a replacement and now it is doing more or less the same thing.  In auto mode it switches itself on presumably to deal with the high VOCs but the level does not drop for hours.  It dropped after the same amount of time even if it wasn’t on but was still plugged in and continuously monitoring.  Does this mean the filters are not working for VOCs or the particular VOCs its detecting? Or does it mean it’s creating a false VOC reading? I’m also getting whines, whistling and buzzing depending on what settings its on and there seem to be a lot of posts on here about these things that haven’t been resolved by Dyson yet. 

6
F
1 month ago
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MartinhRookie Member
asked in Air quality

Dyson fan (am09) filter change - Is there one?

Hello, we’ve just got an am09 hot and cool small fan and it smells, how do we change the filter (if it has one)thanksMartin (Moderation Edit - Tags Added)

4
M
1 month ago
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Manu-joNew Member
asked in Air quality

Ammonia smell coming from the Purifier (TP07) - Suggestions?

My T07 air purifier is making a disturbing smell. Similar to ammonia. It is a new purifier, so I don’t understand what is going on. No smell of any kind similar to it in or around the house (no cleaning product for example). Doesn’t feel safe to use. Any clue?(Moderation Edit - Tags Added/Title Updated)

2
Audra
Community Moderator
2 months ago
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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
G
2 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
J
Bronze Level Contributor
3 months ago
J
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
3 months ago
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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 C
Dyson Community Manager
4 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
K
Silver Level Contributor
4 months ago
A
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
Shaqeela.Isaacs
Community Moderator
6 months ago
M
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
6 months 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)

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DavidTaylor
7 months ago
M
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
7 months 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
7 months 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
7 months 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
7 months 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
E
Bronze Level Contributor
7 months 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
J
Bronze Level Contributor
8 months ago
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