Dyson Purifier Hot + Cool Formaldehyde Review

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I’ve written extensively about Dyson’s lineup of heaters, fans, purifiers and humidifiers. It’s a pretty big lineup… and it’s grown again. Dyson launched its new Dyson Purifier Hot+Cool Formaldehyde not only heats and cools, but it also detects and destroys formaldehyde and senses and traps other pollutants in the air too. The fan uses Dyson’s bladeless technology to move air around your room and can be adjusted to suit your comfort and noise levels.
Dyson Purifier Hot+Cool Formaldehyde Hands-on Review
In this review, I’ll take a look at the fan’s heating, cooling and purifying properties, how well it works, plus its special features.
What is Formaldehyde? And why do I need to remove it from my home?
Formaldehyde is a chemical that is used in building materials and household products. It can also be found in materials made of pressed wood, such as particleboard and plywood, as well as glues and adhesives. Formaldehyde is also used as a disinfectant and germicide and can be found in wallpapers, some fabrics, fireplaces and vehicle exhaust. Laboratories and mortuaries often use formaldehyde for its preservative qualities. Formaldehyde gets into our homes mainly through what’s called off-gassing, where construction or renovation materials, furniture, cabinets and household products slowly release formaldehyde over time.
Dyson's special formaldehyde filter.
So what’s the problem? The Government of Canada calls formaldehyde an irritant, saying exposure to high concentrations can cause burning sensations in the eyes, nose and throat. Formaldehyde is also classified as "carcinogenic to humans" by the International Agency for Research on Cancer (IARC).
Long-term exposure to moderate concentrations may worsen asthma symptoms and may also be linked to other respiratory symptoms and allergic sensitivity.
Formaldehyde is classified as "carcinogenic to humans" by the International Agency for Research on Cancer (IARC).
So… we’d probably rather not have formaldehyde accumulating in our homes. That’s where this special Dyson Purifier Hot+Cool Formaldehyde comes in.
Formaldehyde Filter and Air Quality
The Dyson Purifier Hot+Cool Formaldehyde uses a catalytic filter to detect then break down formaldehyde into water and carbon dioxide and Dyson claims it will never need to be replaced. The solid-state sensor is said to detect formaldehyde molecules 500 times smaller than 0.1 microns. You can actually see in detail the formaldehyde levels in your house; it’s listed as “HCHO” so you can keep tabs on it.
You can set the fan to kick into action automatically when particulate matter increases in the air and drop back down when the air is clearer.
Dyson Purifier Hot+Cool Formaldehyde also has a HEPA H13 standard filter, which can be removed and replaced. Dyson says the entire fan also is sealed to HEPA H13.
Aesthetics
The Dyson Purifier Hot+Cool Formaldehyde has a beautiful, sleek look that Dyson has become known for. The gold-coloured plating on the filter cover provides a nice contrast to the silver body, and the white fan housing is white with a black accent. The remote is also gold-coloured, and curved to match the contours of the fan; a small magnet inside the remote lets it stick to the top of the fan so you can store it somewhere you can always find it.
The unit is big; there’s no getting around that; it’s a bit big in my opinion to be placed on a table or surface; it’s kind of overpowering. The device stands about 30 inches in height, and is roughly 8 inches in diameter.
The airflow is naturally adjustable from 1-10 and I found level 5 got good flow going without being too loud. Speaking of loudness.. how loud is the fan? On it’s highest levels I’d say it’s about average-to-quieter.
How cool/hot does it feel?
I always get asked if a Dyson fan is like air conditioning… I think folks think if it’s this expensive it must also be able to cool the air, right? Not so. This fan straight up blows air around, it does not have any cooling properties, aside from those that come from airflow itself.
How hot does it get?
When it comes to heat, the Dyson Hot+ Cool really shines.
Oscillation
Want the fan to swing side to side? Not only can you set that inside the app, but you can control the size of the arc, from 45 degrees all the way up to a nearly full circle 350 degrees.
Overall review: Dyson Purifier Hot+Cool Formaldehyde
Overall, this is a pretty great and versatile device. I’ve had great experiences with Dyson products; they work very well, require almost no maintenance and they look good in my space.
It sells for about $899CAD from many major electronics retailers.

[@isabelladavis1363]

This might be the next dyson in our home as of now we have the humidifier cooler and are happy with it especially living in a home that’s old dusty and big…thank you for your time and energy

[@ErinLawrenceTV]

That's great! And thank you for watching!

[@apasca98]

Thanks for this review - looking forward to receiving my hot+cool ~!!

[@TheTonkGuy]

BEEN WONDERING ABOUT THESE! THANKS ERIN!!!

[@ErinLawrenceTV]

You're welcome!

[@jongt69]

If you’ve never used an air filter these are great. kzbin.infoUgkx_dppjvjF8BYEmPSDTcgCUdRsgWYLXNHN I ended up with three after starting out with one. The noise level depends on the 1-3 settings with how hard you want the machine to work. You can also upgrade the filters and get one better for pet hair and smells which is a must have in my home. I noticed the air seemed lighter and easier to breathe when running the machine for the first time. Works great every time. Highly recommended!

[@ErinLawrenceTV]

Great feedback. Thanks for sharing.

[@youknowitsmetheone]

Sorry but I just had to make a statement, 37°C is 98.6°F and she said it was plenty warm for most rooms... Thats plenty warm for most summer days at the beach if my house is ever that warm I'm dying of heat exhaustion.

[@jfresh2054]

Very true. I’d be dead to

[@ergophonic]

IMPORTANT NOTE: This unit is significantly louder when on heating mode even at the lowest setting compared to cooling mode. Bear this in mind if you are considering it for the same room as your television as you will need to turn the volume up very loud.

[@ErinLawrenceTV]

Noted, thanks for watching!

[@divine-wind]

Thanks for the info

[@FieldOVision]

Great note , since it wasn’t mentioned in the video

[@standardprocedure7017]

Does it remove large bits of dust from a room ?

[@rossa23]

Good point, I felt the same. Shocked that this was missed from the review.

[@ronm6585]

Thanks for the review Erin.

[@ErinLawrenceTV]

My pleasure! :)

[@isaacsmith1874]

great vid erin keep up the good content

[@ErinLawrenceTV]

Thanks Isaac!

[@stephenbell-booth2648]

Looks like a great product by the way, nice review, thanks

[@ErinLawrenceTV]

Thanks Stephen 😊

[@KrispyCoins]

Nice job would like to know more about the advanced features.

[@gumtree7177]

Just bought one. So far so great. Seems a nice cool natural ish breeze. On a hot day. Good to know if any bad chemicals in the air are not present. Thanks to the purification and eradication processing technology system the Dyson

[@Avgslaveworker]

lol if you’ve ever lived in your house and thought wow this formaldehyde is bugging me! Then this is for you!! If you’re like absolutely normal people. Then you will have never complained or thought about formaldehyde because it’s not something you need to concern yourself with at your house. Unlike those 5g waves however omg get me a wave defender!!

[@camwoo7143]

Impressive production values! You've clearly raised the bar in your videos even higher!

[@ErinLawrenceTV]

Wow, thanks Cam!

[@MaxSunflower]

Hi, can you tell me does it have a mold detection sensor that shows how much mold is in the air please?

[@AndyHiepVu]

What about the maintenance of those filters, how many times do we need to change them and how much are they

[@darrylt5300]

I bought one for the RV 5th wheel and I love it and I move it from the Livingroom to the bedroom at night and for travel day I lay it on the bed and wrap it in a sheet yes it is large but I put is in the corner so the size is not a problem for what it does for us. Only one problem the remote is hard to read day or night but I havnt tried the app yet

[@ErinLawrenceTV]

Glad you love it, thanks for sharing!

[@teamkon]

Hey Erin, great review. We have just purchased this, to try and remove as much dust from a load of building work we had done, and to improve the air of course. We have it on auto, but it doesn't seem to do a lot. Is it best to have the fan on to get the most purification?

[@IceManGav1]

Well yes, generally air purifiers such as this have a minimum run time to clean specific square footages. Mine puts in the work and needs filter replacements every few months

[@AlejandraStamato]

@@IceManGav1 every few months? wow that must be super expensive then ://

[@marietesta7076]

Thank you Erin for the great video.

[@ErinLawrenceTV]

Thank you Marie!

[@ASPIRE1355LC]

Great review, very slick and informative, thank you. I would like it to have mentioned if it kills the flu virus like I have heard (and by extension, possibly covid) and what size area it covers.

[@ErinLawrenceTV]

Thanks Paul! Sometimes it’s hard to remember to include everything 🙃

[@ashworth770]

stay healthy and your immune system will kill most stuff, however nothing beats fresh air

[@gtyah]

Hi. Thank you for the review, good information. Was this a sponsored clip by Dyson? I am thinking to buy an air purifier and this will help me make a decision.

[@andrewburton9126]

Great review thanks 🙏

[@ErinLawrenceTV]

Thanks for watching Andrew!

[@norinickrrostron9001]

So it doesn't actually cool a room, just blows the air like an ordinary fan. It's name is misleading...

[@gumtree7177]

I personally don’t think it’s too big. Liking it so far. It’s fantastic Might be cool if it had an ice bucket to blow ice air. Just temporarily remove the filters while cooling down. That would be cool Dyson.

[@KyleHerrmann]

Good review, thanks

[@ErinLawrenceTV]

You're welcome, and thanks for watching!

[@KomodoSound]

For anyone here who wants a non-sponsored opinion on this product: I got this fan heater (paid for with my hard-earned cash) and I disagree with the reviewer on the noise level part. I find that the Dyson Hot+Cool Formaldehyde is obnoxiously loud, even on the lowest fan speed setting and in night mode. If I want to watch a youtube video or play some music while the fan is blowing, I will have to turn up the volume quite a bit in order to hear the video or the music, because the fan's noise is overwhelming and will cover everything. Especially annoying during zoom conference calls when you're trying to understand what a coworker is saying. I may try removing the formaldehyde filter part in the future to see if it reduces the noise, I assume the air has to push harder to move through this doubled filter layer. I also own the previous version of the Dyson Hot + Cool which cost half the price, and it was much quieter and got the job done just as well, and also had the remote control. The most useful feature of these Dyson fan heaters in my opinion is that if you have an older heating system in your flat or house that does not let you easily adjust the temperature for each room, you can set the temperature to about 19 °C (66.2 °F) on your main heating system, and then use the Dyson small heater to increase the temperature to your comfort level in the room that you spend the most time in (home office computer room in my case) and heat less the other parts of your flat to save money on heating. Also in the past, when I was living in a small studio apartment (about 20 m² or about 200 square feet), for a couple years I used the older Dyson Hot + Cool as my only heating system. And the remote control is very practical to adjust to your liking the temperature. The alternative for me was investing in a new modern thermostat system which could be ten times the price and harder to install. Bottom line : if you are looking for a solution to adjust the temperature of a small space, and you want a Dyson, I would get the older smaller Hot + Cool Dyson (non formaldehyde) for half the price. You won't miss out on anything.

[@ErinLawrenceTV]

Thanks for the feedback and posting your opinion here. I think people will find it very valuable.

[@dylantaylor3431]

Great review, thanks Erin. I'm just looking for a bit more clarification on the filter. It seems they sell replacement filters for about $100 CDN, but you had mentioned that the formaldehyde filter does not need to be replaced. Is there a secondary filter on the unit, maybe an air filter that needs replacing? Basically, under normal operation I'm trying to find out if any parts needs replacing, and if so, how often on average. Thank you. :)

[@PickAnyNameButMine]

@Dylan Taylor The only filters that need to be replaced are the separate HEPA filter and the separate Carbon filter.

[@KINGLIFERISM]

@@PickAnyNameButMine Can't you wash them?

[@irinagl-sky8478]

Search youtube, those machines are defective. As soon as they reach deep cleaning, they no longer useful

[@daniel_s]

@@KINGLIFERISM you cannot wash these hepa filters, and you cant wash any carbon filter. carbon absorbs vocs and depletes itself after time.

[@Patrick76399]

Do we typically need to worry about formaldehyde in a bedroom if we decide to put a Dyson product there? No smokers. No pets. Windows are closed during the winter. Bedroom is on second floor away from the kitchen. Would it be better to go with a different product instead of simply buying this one because it is Dyson's top air treatment product?

[@coleenfussell9436]

Thank you so much for the review. I got an email from Dyson about this product and am very interested. In 2016, I was exposed to very high formaldehyde levels with my work uniform. Since then, I developed asthma, chronic coughing and congestion. I wore the uniform for only 4 months and quit. However, other coworkers were still wearing it, so being around them was torture to my respiratory system. I was working in an enclosed environment, so it was difficult to avoid reaction. Even though I got rid of the uniforms - completely out of the house, I’m always wondering if any chemicals are lingering in my home. I appreciate the detailed review and will strongly consider the purchase. It seems worth it.

[@ErinLawrenceTV]

Thanks for sharing Coleen, I hope it works for you!

[@maheshchintalapudi4954]

Hi Coleen @Coleen Fussell Did you buy this Dyson and how is it working for you asthma, chronic coughing and congestion. I have the same issues and so wondering whether this is working for you or did you find any solution if yes what is that.

[@jvcex]

thanx for review Erin

[@ErinLawrenceTV]

Thank you very much for watching!

[@harrisonbaker6742]

Does the app work from anywhere? Can I turn on/off the dyson on the app from my work?

[@62miyavi]

Merci pour cette superbe vidéo très explicite

[@ErinLawrenceTV]

De rien! :)

[@torinoit]

I discovered this video and channel just today: better late than ... 😀. it would be interesting to know how many time, in the year, the filters needs to be changed, with a normal use at home. Video and channel are very interesting.

[@LOLMAN22]

Insightful video

[@ErinLawrenceTV]

Thank you!

[@wesleymaloney8261]

Good review but you've failed to mentioned the model number of the Dyson unit.

[@miroslavyankov6426]

Hallo. Great video. I love Dyson products. Why are there different types of catalytic filters? I bought two Dyson purifiers. On TP09 it looks more metallic, and on HP09 it is very thin as a mesh of fabric and foam at the bottom. Is there a difference?

[@ErinLawrenceTV]

Good question. I don’t know but maybe someone else here does.

[@lolok1099]

How cold does it get

[@thelounge43]

Do you leave the Dyson on purifier mode all day? Does this use a lot of electricity I guess it uses more energy on heat mode? Thanks

[@ErinLawrenceTV]

When it’s doing purification only it runs very low and I have not noticed a spike in electricity use. When it is heating yes it does seem to use more energy, but again it’s nothing that raises red flags on my heating bills.

[@mrieaa1]

What’s the max heat on this thing?

[@kevinh2209]

What are your thoughts of the filter being made of fiber glass? Is it safe?

[@k.o.t.o.n.]

How efficieent it is both heating and cooling campared to a gree a+++ energie efficient mini split air con?

[@nomad1517]

As far as energy efficiency, on the highest setting, I believe it gets up to 26 watts, which is astoundingly low, they are also energy star certified. As far as filter efficiency, they get down to 99.97 of 0.3 microns and 99.95 of 0.1 making the filters medical grade. Many dentists and doctors have used Dysons in their offices as well as hotels schools etc. While some reviewers like Wirecutter gave Dyson an ok review, they don't take in many factors on how these machines are some of if not the best air treatment tools on the market. Most purifiers have crappy sensors, while Dysons are incredibly accurate, so if you run it on auto mode, the sensors don't over react to something that may not be present, which can save you not only on energy but also on filters. Speaking of filters, their filters never loose efficiency over time, at least they maintain a very high percentage of efficiency. Why is this, first, they are sealed systems, meaning, they don't let particulates escape from the filter through the fan. They have a rubber seal that makes sure nothing but clean air is coming through your purifier. Second, their filters are made with the highest quality fibers and are also very dense giving you very long filter life and efficient as well. The truly biggest factor is how they test. They don't use traditional testing methods like CADR. CADR has been used in the 80s, and doesn't give the bigger picture. It's not accurate in real world situations. Dyson uses POLAR. They talk about it on their website. But the bottom line is, Yes, as expensive as they are. They will last you many years, and not loose performance and have been tested not only by Dyson but by the Asthma and Allergy Foundation of America, IBR laboratories, EN188, and have been partners with the American lung association. So yes, they are worth the money.

[@Bassmunchkin1]

@@nomad1517 many thanks for explaining all of this as I ordered one about an hour ago.

[@NavyProfessional]

There is not one real air purifier review site that recommends the Dyson air purifier devices. As a matter of fact, sites that have compared the Dyson Air Purifier fans to Levoit, BlueAir, Conway, etc air purifiers almpst always have the Dyson air purifier performance at the bottom of the rankings. Then, there is the price. If you want an air purifier, get one that actually performs well. I would look at the air purifier review sites who take a much, much more scientific approach to their reviews. I would actually say that this review is misleading as it infers that the Dyson air purifier is a good air purifier. Again, it is generally ranked at the bottom during any comparison reviews.

[@lynettecruden7025]

Hi Erin, Hi from NZ. Wished I'd watched your review before purchase. I just suppose I thought it would cool a room....Trying to cool my office from 25degC and it is just 'pushing' the air around. Any suggestions, disappointing...

[@ErinLawrenceTV]

Hi Lynette... That's too bad. You could probably re-sell it. Lots of folks are looking for these fans.

[@davidj669]

Great job. Can you do a update. Thanks dave

[@ErinLawrenceTV]

Good idea. What would you like to know?

[@davidj669]

@@ErinLawrenceTV the longevity, how long does the filters last, wondering do you really feel a difference in the household? Thanks David

[@rinzintib]

7min20seconds If you move around that white circle ⚪️ you can position your wind 💨 direction

[@blackmagic219]

cat jumping the fence at 2:08

[@ErinLawrenceTV]

Wow! You have sharp eyes! That is either a cat or a large squirrel! It’s too fast for me to tell

[@Caps78]

I really want this ,the price tag scares me. Not worried about the heater noise. Is the heater good?

[@Caps78]

How long is the filter good for?

[@ErinLawrenceTV]

Heater is great! Very effective and the filters should last about a year. But it depends how often you run it.

[@Caps78]

@@ErinLawrenceTV I bought it and love it so far!!! Thanks for the reply!!!

[@jfresh2054]

@@ErinLawrenceTV how much is a filter?

[@ricardoolguin9639]

Does the hot feature dries the air in a room ?

[@darkstudios001]

Yes

[@Latitude2010]

Thank you Erin for this useful review, I have and was interested in to your review on the BP04 or the BP03. But it’s far too huge for my 50 square metres flat, which (one model)you will advise in my case?.. for cooling & heating OR only cooling and Formaldehyde Air Purifier pls?.

[@g1lb55]

Can you please tell me if this material is a plasticy material or it’s like the dyson pure cool me bp01??

[@ErinLawrenceTV]

Mostly plastic.

[@ANDROEDGAMES]

there is available in amazon?

[@ErinLawrenceTV]

Great question… Not yet! I am watching for that and will share a link when it changes.

[@MrBmm751]

I have a few questions for anyone who has used this device: Will it heat and purify a living area of 1000 to 1200 square feet? Will it heat and purify seperate rooms within that square footage? There are small gaps under each bedroom door…will it purify and heat those rooms when the doors are closed? Is air circulation noticeable? Typical energy consumption with average settings?

[@ErinLawrenceTV]

This will keep a decent sized room warm, but at the same time it’s not a furnace. And it doesn’t really have a way to spread heat over an entire 1200 square-foot space.

[@koolaidpuc]

Is this the same as the Dyson Purifier Humidify+Cool Formaldehyde?

[@isaacsmith1874]

No that unit has a humidifier function but no heater

[@exploringearth3223]

Why do they call it blameless it has blades they’re just on the inside of the unit

[@steflewins]

love mine but hate the gold parts !!!!!!cost me £70 to replace remote and shroud cover !!!! looks much nicer now! shame dyson don't give you the option!

[@va6487]

do you have any allergies? Does it help?

[@ErinLawrenceTV]

I don't but my husband does and it seems to lessen his worst allergy days.

[@thetaijicentre9704]

@@ErinLawrenceTV "lessen" doesn't seem to be a big endorsement for such an expensive item!

[@VC-jb8mc]

I do have allergies and with time I have noticed the difference, especially the air quality. These days because there’s fires all the time I use the machine a lot and I love that I can control it from my phone. I always get compliments on the machine as well, and when I don’t t have the fan rotating I put a pumpkin in the middle, it looks adorable.

[@TheBoxster1998]

I see big ‘dyson’ I click…

[@jamiegoldsmith6194]

Does this device have tip protection?

[@ErinLawrenceTV]

Not per say, but the base is so big and heavy it would be a challenge to tip it, IMO

[@jamiegoldsmith6194]

@@ErinLawrenceTV Thank you. I actually got a hold of Dyson. They do have tip protection if anyone else is wondering

[@Love_laugh_happy]

It doesn’t seem to actually cool, which she mentions in the video. It just blow air. Bit of a let down if u buy it for cooling

[@thiziahudzon5417]

dyson save us , cause we dont have no heater for 4 days dyson is a good heater , expensive but is worth it

[@ErinLawrenceTV]

Yikes! Glad you had it when you needed it!

[@ultravi]

Yesterday got one, but it do not show formaldehyde readings. Contacted with Dyson they trying to convince me that it's not supposed to show hcho menu. Well.. can someone help me? Every review and even official Dyson site shows this HCHO menu's that tell readings of formaldehyde in real time. So who's crazy

[@thetaijicentre9704]

R U sure it is the newest model with "formaldehyde" in the item name?

[@ErinLawrenceTV]

I wish I could see a photo of your fan. If "formaldehyde" isn't on the box as part of the name, you can't get the readings...

[@ultravi]

@@thetaijicentre9704 yes, new box, color, filters and formaldehyde in a name. Absurd situation that they don't know how it supposed to work. But still to this day can't figure it out. All what happened below ⬇

[@ultravi]

@@ErinLawrenceTV update! It is right model. Dyson just doesn't know how it supposed to work exactly.. or at least Russian office. After a whole day of calling to them, waiting video calls from tech support and other fun stuff like: "We gonna call you back in 15" - never did. "I'm gonna check this information with our office, can I call you in a hour" - you can guess.. they don't. Or tech expert saying it's gonna show in VOC menu if there is formaldehyde present in a room. Same expert suggested me to "go to the stores, try to find one that works how you describe it should". Wow it's literary on their site, and in help guide on this model. After all of that(9pm), I get another call (still same expert) "You were right (groundbreaking I know) bla bla can you show me in video call how it works and do a factory reset with me?“ At this point I was so upset, mad and tired that my voice shaked so I just show him wherever he asked, model number, menus, reset. Also in that call I noticed that buttons on remote, fills mushy.. In the end he told that they can take purifier on diagnostic and fix it. Today 5 day since delivery took it, call from Dyson - "You were right about remote" OK great, about other problem? "What problem?" So yes! Again I told them how it works, why is this a problem that function that they advertise do not work. And yeah I got another "we gonna call you later" it's 3am now.. Am I safe to say that they don't call me back? At this point I have no word's. This is not right, or ok

[@dlauthor-artist-poet3169]

Yeah reviews arent that great. Is it loud like they say?

[@youngsoonsin4621]

Dyson hot and cool 가격이 얼마나 될까요

[@Sal_A]

Looks too bulky. The older versions were ideal size even though it didn’t have the extra features

[@lighthunteralp]

Nice video and a beautiful lady, thank you! Cheers from Atlanta

[@ErinLawrenceTV]

Thank you kindly!

[@deanoboland]

👍👍👍

[@stephenbell-booth2648]

The formaldehyde cycle, it’s completely natural and absolutely essential to our survival. Plants produce formaldehyde, it’s part of their defense mechanism.

[@pippipster6767]

I have one … it’s ok … I think there’s a certain amount of BS going on …

[@korndud]

DO NOT BUY THIS PRODUCT. i just got it and have several issues with it already. literally second day in and it's making a unbearable high pitched noises. i also haven't been able to connect it to my wifi even after being on the phone with dyson for AN HOUR. it's also very cheaply made. feels like the whole thing is made out of cheap plastic. i wouldn't be complaining so much if this wasn't insanely expensive (949$ in canada). also, this review is very misleading about the noise. it's extremely loud at maximum level. sounds like a jet engine. ESPECIALLY with the heater on.

[@ErinLawrenceTV]

It sounds like you have a broken unit. You should probably return it.