Fan that filters air
5 Best Air Purifiers + Fan Combos
As we enter the summer months and temperatures begin to soar, you might be tempted to dig your old desk fan out from the cupboard. In a hot and stuffy home, the cool breeze from a fan can provide much-needed comfort, especially while helping you sleep at night or keeping you focused when working from home.
But with rising temperatures, air pollutants intensify and become more persistent. Whether that’s increased pollen count, rampant wildfire smoke, or unwanted odors from sweltering garbage, hotter weather has a big effect on our air quality.
Luckily, there are some great air purifier fan combinations on the market that can tackle both issues. By combining the technology, these purifying fan combos can remove a wide range of pollutants from the air before passing through the fan, so you can rest assured the cool air coming your way is free of any toxins.
"Air purifier combo's are still fairly new and for pure performance savings you would still be better off with getting a seperate air purifier for cleaning and an additional fan.However, the Dyson combo units are great if you are looking for one unit to do two or three functions but don't expect $500 worth of air cleaning. There are a number of genric bladeless units that are available for much cheaper but do have even less cleaning power"
The Top 3 Air Purifiers + Fan Combos
Model
Best Overall
Dyson Pure Cool Tower TP04
Best Budget Option
ULTTY CR021
Best for Large Spaces
ULTTY CR020
Pros
Has 3 separate sensors to measure humidity, PM levels, and temperature
Super quiet in night mode, great air purifier to fall asleep to
Covers rooms of 320 sq. ft., a great distance for a smaller product
Cons
Can be a bit loud at max power
Doesn’t come with an activated carbon filter for odor and VOCs
Filters only last 3 - 6 months
CADR
88 CFM
65 CFM
Filter Technology
HEPA, Activated Charcoal
Recommended Room Size
290 sq.
ft.
320 sq. ft.
320 sq. ft.
Weight
10.98 lbs / 4.98 kg
8.9 lbs / 3.85 kg
9.9 lbs / 4.49 kg
Price
$399.00
$148.99
$149.99
More Details
Buy on Amazon
Buy on Amazon
Buy on Amazon
Best Overall
Model
Dyson Pure Cool Tower TP04
Style
Pros
Has 3 separate sensors to measure humidity, PM levels, and temperature
Cons
Can be a bit loud at max power
CADR
88 CFM
Filter Technology
HEPA, Activated Charcoal
Recommended Room Size
290 sq. ft.
Weight
10.98 lbs / 4.98 kg
Price
$399.00
More Details
Buy on Amazon
Best Budget Option
Model
ULTTY CR021
Style
Pros
Super quiet in night mode, great air purifier to fall asleep to
Cons
Doesn’t come with an activated carbon filter for odor and VOCs
CADR
65 CFM
Filter Technology
Recommended Room Size
320 sq.
ft.
Weight
8.9 lbs / 3.85 kg
Price
$148.99
More Details
Buy on Amazon
Best for Large Spaces
Model
ULTTY CR020
Style
Pros
Covers rooms of 320 sq. ft., a great distance for a smaller product
Cons
Filters only last 3 - 6 months
Filter Technology
Recommended Room Size
320 sq. ft.
Weight
9.9 lbs / 4.49 kg
Price
$149.99
More Details
Buy on Amazon
Air purifier fan combos have become more and more popular in recent years, having your indoor air cleansed on an hourly basis and having a calming, cool breeze running through your house/apartment is just about the perfect indoor scenario you can have in the summer seasons.
In today’s world, an air purifier is a fantastic way to help tackle those indoor pollutants that may be lurking around our home space.
They help with allergies, mold problems, and can keep a lid on our fluffy indoor pets that produce lots of dander. Some filters can also eradicate foul smells or volatile organic compounds that may find their way in from the outside world.
Fans, as we all know, keep us cool particularly in a hotter climate. They are great to have on around the house and can provide a comforting breeze at night when opening a window might not be enough.
Below, we have provided a list of the 6 best air purifiers + fan combos that we believe can provide you with all the necessary comfort while keeping your living space free of indoor contaminants.
The three-in-one Dyson Hot + Cool HP04 is one of Dyson’s greatest products yet. Certified as asthma and allergy-friendly, the HP04 is sleekly designed and perfect for indoor spaces such as living rooms, bedrooms, and offices. Functioning as an air purifier, cooling fan, and heater, this product stands out as one of the more uniquely made units on the market.
The HP04 is around 30 inches tall and will blend in around your home while automatically sensing air pollution. The LED display screen will inform you of the air quality levels and will clean, heat, and cool spaces of up to 400 sq. ft.
Equipped with a powerful heating and cooling system, the HP04 is perfect for both the summer and winter seasons. The display screen will also change color depending on contamination levels – it will show yellow and red when the air is polluted and flash a healthy green when the air quality is great.
SPECS & FEATURES| Purifier technology: | HEPA, Activated Charcoal |
| CADR (CFM / m³/h): | 88 CFM |
| Recommended room size: | 400 sq. ft. |
| Filter life: | 12 months |
| Noise level (low – high): | 24 – 62dB |
| Dimensions (in inches / in cm): | 9.6 L x 8.07 W x 30 H inches / 24.38 L x 20. 49 W x 76.2 H cm |
| Weight (in pounds / in kg): | 19.18 lbs / 8.7 kg |
| Energy consumption: | $53.88 per year |
👍 Color changing LED display screen informs you of the air quality levels
👍 Perfect for both the summer and winter seasons. Features a cool fan and a heater
👍 Great power for a smaller unit
👍 Can be connected to a smartphone via the app
👎 A bit expensive
👎 Can be a bit loud at maximum power
CHECK PRICE ON AMAZON
The ULTTY CR021 is another intelligent bladeless fan and air purifier combo with some great specs and features to admire. Controlled by either the LED touch screen or remote control, the ULTTY is beautifully crafted, conveniently sized, and acts as a great bedroom fan in the hot summer seasons.
This unit features an astonishing 9 fan speeds and reaches a maximum noise level of 35dB, making it a worthy purifier for bedrooms and small office spaces.
Recommended for smaller to medium size rooms, the CR021 can cool and purify the air of up to 320 sq. ft. which is great for the size of this product.
Equipped with a 90-degree oscillating fan and a HEPA filter will help disperse air-born contaminants such as mold, dust, and pet dander super effectively and remove 99.97% of airborne particles. The easy-to-use remote control features everything you need to adjust your purifier and fan with settings such as timer, sleep mode, light up, wind increase and decrease, and maximum wind power.
SPECS & FEATURES| Purifier technology: | HEPA |
| CADR (CFM / m³/h): | 65 CFM |
| Recommended room size: | 320 sq. ft. |
| Filter life: | 3 – 6 months |
| Noise level (low – high): | 35 dB MAX |
| Dimensions (in inches / in cm): | 10 L x 10 W x 23.5 H inches / 25.4 L x 25.4 W x 59.69 H cm |
| Weight (in pounds / in kg): | 8. 9 lbs / 3.85 kg |
| Energy consumption: | $76.04 per year |
👍 Great budget unit costing under $150
👍 Great size! It’s easy to transport and relocate in your home
👍 Super quiet in night mode so you can fall asleep whilst it’s on in the background
👎 Shame there’s no activated carbon filter for odor and VOCs
👎 Doesn’t feature an auto mode
CHECK PRICE ON AMAZON
The Dyson Pure Cool TP04 is the latest model and it impresses. Like other Dyson models, its bladeless function is what makes these products super unique but the TP04’s sleek design and handy features are what make the Dyson Pure Cool Tower a great choice for an air purifier and fan combo.
READ OUR REVIEW
With an option of 3 stylish colors, this metallic towering product will keep you both cool in the summer seasons, warm in the winter, and keep your room fresh from indoor contaminants all year round.
The TP04 also features a HEPA filter and an Activated Carbon filter, tackling airborne pollutants such as dust, mold spores, pet dander, and pollen.
The activated carbon filter however is specifically designed to take on unwanted odors and potentially dangerous VOCs that may occur in our home space. Common examples are usually traffic pollution, paint fumes, cooking odors, and cigarette smoke.
With a recommended room size of 290 sq. ft., this unit is more than capable of cleaning smaller rooms with great efficiency as well as providing a calming environment with its ultra-cool fan breeze. On the highest fan setting the TP04 can be a little louder than other products on the market reaching a maximum of 70 decibels but it can also go as low as 40 decibels at lower fan speeds.
Thanks to an easy-to-understand LED display screen (which can be dimmed in night mode) this unit also measures the air quality in your home automatically to tell us just how polluted or uncontaminated our home is.
It makes use of 3 separate sensors which measure temperature, humidity, and PM levels.
| Purifier technology: | HEPA, Activated Charcoal |
| CADR (CFM / m³/h): | 88 CFM |
| Recommended room size: | 290 sq. ft. |
| Filter life: | 1 year |
| Noise level (low – high): | 42.3 – 70dB |
| Dimensions (in inches / in cm): | 7.77 L x 8.77 W x 40 H inches / 19.7 L x 22.2 W x 101.6 H cm |
| Weight (in pounds / in kg): | 10.98 lbs / 4.98 kg |
| Energy consumption: | $53.88 per year |
👍 Love the design! Metal and choice of colors really blend well with home decor
👍 Great features such as the 3 separate sensors that measure humidity, PM levels, and temperature
👍 Unique fan because it’s bladeless
👍 Energy-efficient
👎 Wish it could cover more floor space
👎 Can be a bit loud on full power
CHECK PRICE ON AMAZON
Functioning as both an air purifier and a cooling fan, the Dyson Pure Cool Link TP02 is packed with great features and performs very well in larger areas of up to 500 sq.
ft. Designed to create a healthy and comfortable home space, this unit is perfect for the hot summer months and will make a great addition to your home.
READ OUR REVIEW
Engineered to clean both allergens and pollutants from our homes, the Dyson TP02 features a glass True HEPA filter capable of capturing 99.97% of indoor particulate matter down to 0.3 microns in size, and an activated carbon filter to remove household odors and gases.
The TP02 has 10 fan speed settings and when placed in night mode this unit can be dimmed so you can fall asleep comfortably without any distractions. Although the TP02 is a little more expensive than other Dyson products, it surely makes up for its performance, making this one a great future investment.
SPECS & FEATURES| Purifier technology: | HEPA, Activated Charcoal |
| CADR (CFM / m³/h): | 88 CFM |
| Recommended room size: | 500 sq. ft. |
| Filter life: | 1 year |
| Noise level (low – high): | 40 – 62dB |
| Dimensions (in inches / in cm): | 4.4 L x 7.5 W x 40 H inches / 11.17 L x 19.05 W x 101.6 H cm |
| Weight (in pounds / in kg): | 8.4 lbs / 3.81 kg |
| Energy consumption: | $121.66 per year |
👍 Filters last for 1 year without needing to be replaced
👍 LED lights can be dimmed
👍 Powerful fan, high performance
👍 The remote control is magnetic so it can stick to the unit making it difficult to remove
👎 It’s a little more expensive than other purifier fan combos
👎 Can cost quite a bit to run if you’re using it all the time
CHECK PRICE ON AMAZON
The small and sleek ULTTY CR020 offers tremendous air circulation in smaller-sized rooms for the whole family to enjoy.
Featuring bladeless technology at the press of a button, this unit will cool and purify the room effectively with a low noise output of around 30dB.
READ OUR REVIEW
Featuring 3 fan modes, the ULTTY CR020 operates in normal, natural, and sleep modes making it super versatile from quickly tackling indoor contaminants or falling asleep to. Equipped with a true HEPA filter capable of picking up 99.97% of indoor contaminants allows you to stay safe and cool in your bedroom, dining areas, and office rooms but simply turning it on and relaxing to the calming breeze.
Operating by either remote control or LED touch screen, the ULTTY CR020 features 9 fan speed settings and offers a 90° widespread oscillation, moving from side to side by putting it in auto mode. This bladeless tower fan circulates smooth and cooled air by using an innovative technology that amplifies cooling power to produce a powerful and healthy stream of purified air.
SPECS & FEATURES| Purifier technology: | HEPA |
| CADR (CFM / m³/h): | 35 CFM |
| Recommended room size: | 320 sq. ft. |
| Filter life: | 3 – 6 months |
| Noise level (low – high): | 35dB MAX |
| Dimensions (in inches / in cm): | 12 L x 10 W x 24.5 H inches / 30.48 L x 25.4 W x 62.23 H cm |
| Weight (in pounds / in kg): | 9.9 lbs / 4.49 kg |
| Energy consumption: | $119.49 per year |
👍 Bladeless technology
👍 Dimming LEDs for night time so it’s not too bright
👍 Covers a room of 320 sq. ft.
👍 Functions in 3 modes normal, natural, sleep
👎 Wish the filters lasted a while longer
👎 Would like to see an optional carbon filter for odors and VOCs
CHECK PRICE ON AMAZON
FAQs About Air Purifiers for Fan Combos🤔 How does an air purifier fan combo work?
The main purpose of an air purifier fan combo is to cycle and filter out unhealthy air continuously while also distributing fresher air.
Some purifiers are built to move large quantities of air, keeping you cool while capturing and eliminating airborne contaminants. Other air purifiers instead offer a unique filter design that lets air blow out just like a fan. These tend to have oscillation functions for thorough room coverage.
When it comes to most air purifiers, they consist of an electric fan that draws air into the intake portion of the unit. All of that air then goes through the filtration system to trap the pollutants, and the air is subsequently released back into the environment once it is cleaned.
These air purifier fan combos don’t typically lower the overall temperature in a room, however. Instead, they can provide a cooling sensation just like standard fans.
🤔 What are the benefits of having an air purifier fan combo?With an air purifier fan combo, you’re able to get the best of both worlds. The filtration system will consistently trap and reduce harmful airborne particles.
Meanwhile, the fan portion will cycle out cleaner air. Since most of these units have oscillation functions, the air circulates better in a room too, so that the entire area being targeted feels fresher and cooler.
Ionizers focus on using ions, which are positively or negatively charged particles. In a purifier, an ionizer will utilize electricity to create negative ions and discharge them into the air. These released negative ions will latch onto the positively charged particles in the air, such as bacteria and allergens, and they’ll form a bond that produces dense dirt particles.
So… Which Air Purifier is Best for You?When you want a fan, but you don’t want to deal with unfiltered air blowing around, the best thing to do is purchase an air purifier fan combo. These quality units are able to successfully filter out harmful airborne contaminants, and at the same time, release fresher, cleaner air that will also be cooler.
This type of combo allows you to purchase only one device instead of two separate ones, and it saves you money and space. Many of these have oscillating features too, blowing out air consistently at different angles for total room coverage.
Our reviews should help you find the best air purifier fan combo to suit your household needs. Also, don’t forget to check out our top three picks for our favorite small room unit, mid-range room unit, and large room purifier.
How We Picked Our Top Choices
- True Fan and Air Purifier – There is not a big number of true combo units so we have made sure to only include units that offer fan performance and at least HEPA purification.
- High performance for the price – Whilst our favorite unit would be one of the Dysons, we understand that not everyone has $600 to spend, so we made sure to also include cheaper units that do the same job at a more affordable price.
- Heater, fan, and air purifier – We also chose to include units that had heating elements so they could provide three functions — fan, air purifier, and heater.
Monthly energy consumption costs have been calculated using our air purifier electricity usage calculator, which allows us to calculate daily and yearly costs associated with running an air purifier for 24hs a day. You can customize the result by air purifier wattage and by state. In the case of the calculations we shared on this page, we used California as our base state for energy prices.
Last update on 2022-12-23 / Affiliate links / Images from Amazon Product Advertising API
Top-Rated Brands, Reviews, Models – Rolling Stone
RS Recommends
Take down a room's temperature, as well as the germs floating around in it, with these helpful devices for your home
If you purchase an independently reviewed product or service through a link on our website, Rolling Stone may receive an affiliate commission.
With summer heating up, and the pandemic on round three (or four? We’ve lost count), a device that can kill germs and cool down a stuffy room is ideal for anyone without an air conditioner.
But even if you’ve got AC, these cooling air purifiers are a welcome bonus, circulating clean air throughout the house and even showing you ratings and analyses of indoor air quality as it goes. Here’s what to know about about these amazing machines.
The best cooling air purifiers do double duty as both a cooling fan and air filter. Here’s what to keep in mind when shopping for the best cooling air purifier for your space.
Air Purification: When you think of pollution, the first thought is often from the outdoors. But appliances inside your house produce gasses that can be harmful in large quantities, as well as pollen produced from household plants, and germs spread from person to person. These devices will often identify pollutants, and either knock them out of the air or trap them in the filter.
Sensor: A sensor is where it all starts. This is the central brain of the device, informing it when levels of no2, VOC, co2, or indoor air quality gets to levels where it needs to flip on.
Whether it’s built into the unit or remotely set up, the sensor is what you’ll be relying on when you’re not controlling this manually.
Fan: You’ll want the fan to be powerful based on the size of your room and house, but consider noise levels as well. If you’re purchasing this for sleep or to cool down a baking hot room on a summer night, a loud fan may be counterintuitive.
Filter: This is what’s going to be at the center of capturing nasty dust particles and allergens in the air, so make sure it’s up to the task. A HEPA air filter is ideal for trapping near 100% of pollutants in your home’s air, often as small as 0.3 microns. That’ll knock out things like mold spores, pollen, and especially pet hair.
Extras: Being compatible with Alexa or an AI home software is a nice perk for easier control, as well as hooking up to your house thermostat if possible.
What Are the Best Cooling Air Purifiers?We’ve rounded up some of the best cooling air purifiers you can buy online, based on ease of use, effectiveness and features.
1. Dyson Pure Hot + Cool Air Purifier
Dyson Pure has the ability to not only cool down a room, but also heat it up, as well as purifying the air all around your space. Think of it as a 3-in-1 device.
This expertly-designed fan first senses pollutants in your home, captures them, and projects fresh air back out.
The LCD screen is especially detailed here and was among our favorite features, showing you the status of the filter as well as what it’s doing at each step. A handy remote control lets you control settings with the touch of a button.
The bladeless fan, meantime rotates to project cool air around the room, instantly cooling it down without distracting you with buzzing or noise.
Buy Dyson Pure Hot + Cool Air Purifier $791.64
2. Sensibo Pure Smart WiFi Air Purifier
Sensibo’s cooling air purifier is quick to set up and get going right out of the box, and is constantly scanning to keep the air clean and cool.
The device’s sensor calculates indoor air quality 24/7, turning off and on as needed, removing small particles along the way. The triple-layered HEPA and carbon filters do a nice job of catching nasty stuff in the air, and Turbo Mode kicks it into high gear, even when you’re not at home (using your phone’s GeoLocation).
WiFi connects up easily and it’s compatible with Apple HomeKit, Google Home, Amazon Alexa, and mobile iOS & Android apps. Plus you can integrate your existing AC setup and boost purifications significantly too.
Buy Sensibo Pure Smart WiFi Air Purifier $169.00
3. Westinghouse Bladeless Tower Fan
This sleek bladeless beast removes and kills harmful particles from the air, including bacteria, viruses and mold, allowing you to breathe easier. The pre-filter and HEPA filter go even further, catching things like pet hair and dust, while sterilizing everything with UV light.
At 32 inches tall and only ten pounds, this cooling air purifier is easy to carry around between rooms, and the small remote lets you control its nine speeds from the couch.
You can also angle it up to 45 degrees, to make sure you’re getting the best breeze. It’s also nicely quiet, at below 55db.
Buy Westinghouse Bladeless Tower Fan $189.99
4. ULTTY Bladeless Tower Fan Air Purifier
At just a little over eight pounds, this cooling air purifier works well for a small bedroom or child’s room, even more so since it’s bladeless and safe for kids (and pets).
The airflow is smooth and covers about 320 square feet, with minimal noise and a 90-degree oscillation. It’s also particularly easy for anyone to operate, either by the LED touchscreen or included remote.
Buy ULTTY Bladeless Tower Fan Air Purifier $148.99
5. Lasko Products Oscillating Tower Fan
If the name Lasko stands out in your memory, there’s a good chance your parents, grandparents, or even great-grandparents had one in their home. The company has been around since 1906, and has kept up with the times, integrating air purification into a tower-model fan.
This covers an entire room with a relatively small and tall footprint, and has three speeds that still run quietly even on high. The air purification is a bit different than the others – the fan constantly disperses negatively-charged ions, which bond with harmful positively charged ions like dust, bacteria and pollen, pulling them to the ground and out of the air.
Buy Lasko Products Oscillating Tower Fan $66.96
90,000 overview of the air cleaner with the Dyson Pure Pure CoolPassport Features, Supply Set and Price
| Model | Pure Cool (TP00 Code) | Air function | 9000 9000 9000 9000 9000 9000 Colorwhite/silver | |||
|---|---|---|---|---|---|---|
| Control | mechanical button on the housing and IR remote control | |||||
| Electric power | 56 W | 9000 mm | ||||
| Noise level | 35-62 dB | 434 l/s (blowing) | ||||
| Degree of purification | removes gaseous substances and 99. 95% of allergens and pollutants from the air (including particles as small as 0.1 microns) | |||||
| Features friendly (suitable for asthmatics and allergy sufferers) (ASP:18-01/101) | ||||||
| Supply set * |
Link to manufacturer website | Dyson Pure Cool | Average price | | ask price0007 Retail offers | ask price |
Appearance and function
The cleaner is supplied in a relatively large elongated box made of strong corrugated cardboard.
The box is wrapped in foil and equipped with a plastic handle, so it will be easy to carry the purchase home and the box will remain clean.
The design of the box is strict and informative, on the planes it is clearly told about the main advantages and features of the product, about the methods of use, and the exact weight is indicated so that the integrity of the package can be determined by weighing. Variants of inscriptions in Russian are present. A small amount of plastic film is used for packaging, and corrugated cardboard inserts and partitions are used to protect and distribute components. nine0127
In the box we found the purifier disassembled into two parts with a non-removable power cable, remote control and user manual.
The manual is multilingual, blocks with information in one language are scattered over dozens of pages in several sections, which, of course, is not very convenient for studying. Assembly is not difficult. With one movement, the upper part is installed on the base, the device is connected to the mains - and that's it, you can use it. Formally, the device is forbidden to be carried by grabbing it by the upper part, but it is very inconvenient to do it otherwise.
Practice has shown that nothing terrible happens with careful handling, the upper part, if carried over it, does not separate from the base, but we still cannot recommend ignoring the instructions. Due to the relatively wide base and the center of gravity displaced downwards, the device has good stability, and five rubber tablet feet located at the bottom along the perimeter of the base prevent the cleaner from slipping on smooth surfaces. nine0127
The main parts are made of white plastic on the outside, mirror-smooth and possibly coated. Fingerprints on such plastic are invisible, it is easy to clean (at least until scratched). The duct socket and its inner part, as well as the filter housing, are also plastic, but with a matte silver finish.
Air is taken in through a grate around the base and blown out through a duct at the top. Rather, air is blown out through slots along the perimeter of the inner part of the duct, while part of the air in the socket is entrained by jets from these slots.
As a result, the amount of volume moved increases due to the additional movement of air through the duct. This is the essence of technology Air Multiplier .
To remove the filter element, press the two buttons above the grille, remove the upper part of the housing, then remove the grille and filter element through the top.
The filter element is cylindrical, the holes on the outer grille and in the lower part of the motor block allow air to be taken from all sides of the cleaner, which the manufacturer notes as one of the advantages. The filter consists of several layers, first comes a plastic mesh that traps coarse dust, then a pleated HEPA filter made of borosilicate glass fiber, then a layer with activated carbon. The charcoal is impregnated with a tris compound (tris(hydroxymethyl)aminomethane), which helps retain harmful substances. In particular, formaldehyde reacts with tris to form a new compound, that is, formaldehyde is chemically bound and will not desorb over time back into the air.
Rubber seals exclude parasitic air suction past the filter. The device is programmed to remind you to change the filter after 12 months, based on 12 hours of daily use. With more intensive use, the reminder will appear earlier, and it is also possible that operation in conditions with high air pollution will require more frequent filter replacement. nine0127
The device we measured is 1020 mm high, 196 mm base diameter, 184 mm wide top, and 110 mm deep. The mass of the purifier assembled and with the power cord is 3635 g. These values are close to those indicated by the manufacturer. If you expect that the flow should be directed to standing or sitting adults, then the height of the cleaner when placed on the floor is sufficient to blow well the sitting people.
For better airflow to the sides, you can turn on the rotation mode, in which the body turns left and right. According to the manufacturer, the rotation is 70 degrees in each direction, in fact - 80 degrees in total, that is, 40 degrees to the right and left.
The device is controlled by a button on the bottom of the case. A short press turns the device on/off. A long press scrolls the blowing power setting value (from 1 to 10 and back from 10 to 1, and so on through the cycle). Above the button, a segmental LED indicator shows the current blowing power. nine0127
The indicator is not very bright and dims a few seconds after changing the settings, so it is unlikely to disturb sleep.
It is more convenient to operate the device using the remote control. Only they can turn on / off the rotation and set the timer (from 15 minutes to 9 hours) to turn off.
The remote control is small and light (20 g, 78×32.5×10 mm), its body and buttons are made of plastic with a matte silver finish, and at the ends there are plugs made of transparent plastic, tinted in the case of the front. When pressed, the button clicks softly. Sending commands via IR. The remote control is powered by a single CR2032 battery. You will need a Phillips screwdriver to replace it.
nine0127
The regular location of the remote control is on top of the fan housing, where it is held by a magnet.
The device is connected to the mains using a 1.8 m power cable with a Euro plug at the end. The cable has medium rigidity. Note that the Dyson Pure Cool comes with a two-year warranty. A copy that we tested in Malaysia was made.
Testing
We did a comparative test of the air cleaning speed. The description of the technique is given in this article. The graph below shows the relative (in %% of the initial) smoke concentration from the time after the smoke generator was turned off and the purifier turned on and after a short period of time required to establish the mode. We indicate that the volume of the test room in this test was 8 m³. To measure the smoke concentration, we used a homemade sensor based on a fire detector and a Xiaomi PM2.5 Detector Air Quality Monitor, which, apparently, shows the concentration of particles of the PM2.5 class in μg / m³.
In the case of the Xiaomi sensor (signature with PM2.5 in brackets), the concentration of 600 µg/m³ is taken as 100%, and the graph is plotted from the beginning of the decrease in concentration below this value. nine0127
In this test, the Dyson Pure Cool was set to maximum power. For comparison, data obtained for the IQAir HealthPro 250 NE and Dyson Pure Hot+Cool air purifiers are shown. Having plotted the experimental dependences of concentration on time (C(t)) in linearized coordinates ln(C) on time (t), we determined the filtration rate coefficient (Kf/V) from the slope of the linear approximating function. Multiplying the coefficient obtained by the volume of the room, we get the filtration rate. The result is shown in the table below. nine0127
| Air cleaner | Filtration rate, m³/h (l/s) | Double reduction*, min. | |
|---|---|---|---|
| Dyson Pure Cool | 103 (29) | 39 | |
| Dyson Pure Hot+Cool | 149 (41) | 000 9000 9509 3050 9000 3050 9000 3050 NE 9000 NE 9000 NE 9000 NE 9000 30 13 | |
* for 35 m² room with 2. 75 m ceiling (volume 96.25 m³) | |||
Note that the value of 434 l / s given in the passport characteristics does not refer to the filtered air flow, but to the total volume of pumped air, taking into account the multiplication by the Air Multiplier system.
The table above shows the time it takes to halve the concentration of pollution for a 35 m² room with a ceiling height of 2.75 m. It turns out that the Dyson Pure Cool purifier is about 6.5 hours (390 minutes) will reduce the concentration of pollutants (in the form of fine particles) in the air by 1000 times in a room with a volume of 96.25 m³, which in most cases can be taken as a complete cleaning. Note that the manufacturer gives the following data for the rate of cleaning from gaseous substances: “Gas capture complies with the GB/T18801 standard. After 60 minutes of operation in a 30 m³ room, it removes 90% benzene and 80% formaldehyde.”
We measured the noise level with the Dyson Pure Cool placed vertically on the floor.
The sound level meter microphone was placed at a height of 1.2 m from the floor (approximately at the height of the ear of a person sitting on a chair), at a distance of 1 m to the side of the purifier body and was directed at it. The graph below shows the weighted sound pressure levels and power consumption values for ten levels of blower power. nine0127
Bright indicator light adds 0.2W and rotation adds 2.4W. In standby mode, 0.3 W is consumed from the mains.
For comparison, we give the table of conformity of the values of the UZD and our subjective sensations:
| UZD, DBA | Subject assessment | 20-25 | Almost silently | 9000 90009000 9000 9000 9000 9000 9000 9000 |
|---|---|---|---|---|
| 30-35 | Clearly audible but not yet loud | |||
| 35-45 | tolerant | |||
| 45-55 | Noisy, Work/Cinema Watch unpleasant | 55-65 | very loud, but the most typical floor vacuum cleaner | |
loud only at the last two speeds. At the first four speeds, the cleaner is unlikely to interfere with sleep. The noise is uniform, its character does not cause irritation. The case rotates left and right from a practical point of view silently. nine0127 
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Those. air should not enter, but exit through the cracks and leaks of the system unit. 
This is the best option in terms of common sense. It is worth noting that most household vacuum cleaners work in much the same way, with dirty air first passing through a filter so as not to contaminate the fan and its motor. 
Due to the small area of such filters (80x80=6400mm 2 ), in order to create a significant air flow, manufacturers have to reduce their flow resistance by increasing the size of its cells. The cleaning frequency of such a filter is higher than if there was a filter with a larger area. nine0127 
The actual filter characteristic has a non-linear form. Graph 1 clearly shows that when the fan is running without load (idle P=0), it will produce its maximum performance M=max. If the fan is completely closed, then, obviously, its performance will be equal to zero (M=0), while it will create its maximum air pressure (P=max). The characteristic of the filter shows that as the pressure of the air flow increases, the amount of air passing through the filter will increase. nine0127 
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On this site the air permeability of various filter materials is indicated at a pressure difference of 50 Pa in units of dm 3 /m 2 s. This value shows how much air will pass through one square meter of material in one second at a pressure difference of 50Pa. Depending on the type of material, it can vary over a wide range. nine0127 
85 cubic centimeters, or 28.32 cubic decimeters (10cm \u003d 1 decimeter). There are 60 seconds in one minute. We get the conversion formula X=Y/28.32*60=2.12*Y, where Y is the value in dm 3 /m 2 s, and X is in CFM/m 2 . We get that 300 dm 3 /m 2 s is 635.59 CFM/m 2 . 
0050(m). Let us calculate the area of several filters for L = 10, 20 and 30 centimeters and enter the data in Table 1. For each value of the filter areas, we calculate the air flow passed by them, knowing that one square meter of our material at a pressure difference of 5.09mmH 2 O passes 635.59 cubic feet of air per minute. | Filter | Flat | Bag | ||
| Dimensions | 80x80mm | L=10cm | L=20cm | L=30cm |
| Area, m 2 | 0.0064 | 0.030 | 0.055 | 0.080 |
| Air flow, CFM | 4. 067 | 19.068 | 34.957 | 50.847 |
As already mentioned, the air permeability of the material is indicated for a pressure of 5.09 mmH 2 O. Let us plot the obtained data for several filters on Graph 5. have a linear appearance. nine0127
Conclusions that can be drawn from this graph: firstly, it is quite obvious that having the material and fans, you can assemble a filter that will provide the case with a certain amount of air. For example, a filter made from the selected material with a bag size of 20 cm and an 8025M fan will produce 10 CFM (cubic feet per minute). Secondly, the size of the filter affects the resistance it will provide to the air flow. If you make a filter of the selected material in the form of a square of 80x80, then the throughput with the same fan will be about 2 CFM, which, of course, will not be enough for proper ventilation of the case.
It follows that when using the same fans to increase performance, it makes sense to maximize the area of the filter, thereby increasing the frequency of its cleaning. Thirdly, it makes sense to use centrifugal fans only with high resistance filters, otherwise the performance of such a filter will be less than with a conventional fan. nine0127
Above, the operation of filters was considered without taking into account the resistance created by the housing. It is obvious that the filter will be most effective when the case resistance is minimal. To ensure this condition, it makes sense to arrange various kinds of blowholes and install fans for blowing, not forgetting that the efficiency of such a scheme is achieved only if all the air entering the system unit passes through the filters.
Let's pass from theory to practice. The first variant of computer modification was undertaken on my first computer based on Intel Pentium 233. Now it works as a small local network server. nine0127
The circuit shown in Figure 3 was chosen.
Several combinations of materials and fans were tried (up to 220 volts). Ultimately, the most effective option turned out to be the one with two conventional 80 mm. fans and a lavsan cloth bag of impressive size. As it was found out later, the performance of one 80 mm fan is quite enough to purge the bag, half the area.
In the front wall of the computer, including the panel, two holes were cut coaxially for an 80 mm fan. A ring 20 mm thick with an outer and inner diameter of 78 and 111 mm, respectively, was sawn from a piece of chipboard. Both fans were attached to the front wall of the computer through a ring with threaded studs, on which nuts were screwed on both sides. nine0127
The canvas bag was fixed to the ring with a car tie. The power supply fan was turned on through a resistance so that its performance was less than the performance of the filter. Because this option implied active contamination of the filter fans, their plain bearings were replaced with rolling bearings to increase the life of the fans.
For the past two years, the computer has been working almost without shutdowns. If you take a closer picture of the insides, you won't see dust there, even on the processor fan. Believe it or not, he didn't vacuum before taking the photo. nine0127
As you can see, the filter material has acquired a gray color, this is especially noticeable in comparison with the new filter.
The bag has only been emptied twice in 4 years. The first time about a year or a half ago, and the last time after receiving these photos. The photo below shows the contents of the bag. There is a lot of dust, but there is still room for it.
If you turn the bag inside out, you can even find some living creatures there. Here's another plus of such a system :-)
With the advent of the Athlon 900-based computer, it became possible to continue experiments. This time, the scheme of Figure 4 was taken as the basis.
A distinctive feature of this option was the installation of a fan after the filter material. After a short experiment with the AutoCAD program, a 3-dimensional graphic model of the filter was obtained.
As planned, air with dust should have been sucked into the filter from the outside, and then thrown out by the fans inside the case. Unlike the model, it was decided to make the filter material in the form of a 3-fold nested cone to increase the area. Below is a cross-sectional view of such a filter. nine0127
In order for the air flow through the filter to be good, 2 fans had to be placed on each cone. To reduce the noise created by the mutual influence of the two fans, they were separated by a ring sawn out of chipboard. In a real implementation, it was decided to install two such filters. At the top of the case, a flow was created for cooling 5.25" devices. At the bottom, a directed flow was obtained for expansion cards. The filter casings were made of flower pots, which were attracted to the case with brackets, while clamping the filter material.
This implementation had two significant drawbacks:
- The cones amplified the noise of the fans, like a horn. The system was quite efficient, but very noisy.
- The process of removing and installing filters was extremely inconvenient.
I tend to conclude that these were not shortcomings of the proposed scheme, but rather the results of an unsuccessful version of its implementation. In the end, I returned to the option shown in Figure 3 and described in the article "My computer's mod is an air filter". nine0127
In this version, the air enters the case in almost the same way, with the only difference that the fans pass first. The air from the case is expelled from the power supply, mobile racks and a homemade air vent on the processor. Of the advantages of this scheme, it is worth noting its simplicity and ease of access to filters. Among the shortcomings: warm air escaping through the rear wall is partially sucked back into the upper rear filter.
At the bottom, there is no directed flow to expansion boards, including the video card. For the case of a friend, a more sophisticated system was made, because. there was little space. The manufacturing process of the system is described in the article "Mod for a friend on the topic of air filtration". nine0127
The effectiveness of all the above filters was determined very simply. After some time of work, the system unit was opened and it was revised for dust. Even a small amount of it was enough to conclude that the circuit was not working as it should. After that, the necessary changes were made to the system and the process of determining the effectiveness of the work was repeated. At the same time, due attention was paid to the thermal regime of the system unit, because no one needs even a sterile, but burned out or buggy computer. nine0127
With these words I conclude my trilogy of articles on filtering. I hope these articles will be useful to novice experimenters in this field.
