DREO Macro Max S Air Purifier – Trusted Review (2023)

More and more air purifiers are equipped with smart options such as air quality sensors, air quality indicators, auto mode, smart apps, and other advanced options. Quite simply, the market is evolving, and brands are becoming more and more competitive with each other.

DREO Macro Max S - Air Purifier Review
DREO air purifier in the living room.

In this review, I am testing an air purifier from DREO, a brand that has only recently started to bring air purifiers to the market. The DREO Macro Max S is a smart air purifier designed for rooms up to 423 sq. ft. with exciting features and great build quality. It is characterized by its three levels of high-quality filtration technology.

This air purifier has surprised me positively in many tests, but also with the possibilities it offers. I simply did not expect that a relatively new brand on the air purifier market could have such a complete air purifier. I did not encounter any obstacles while using the device. Even the smart app works flawlessly, which is not the case with much more expensive air purifiers.

In short, I am describing in detail all the features of the DREO air purifier, showing the testing results, describing the filter change procedure, explaining how to use the smart app, and finally, finding out whether this air purifier is worth buying. So sit back, enjoy the in-depth review, and learn something new.

Short on Time? Here’s My Short Summary of The DREO Macro Max S!

  • The DREO Macro Max S covers rooms up to 423 sq. ft., and cleans the air 4.8 times in one hour.
  • This air purifier uses a three-stage filtration technology consisting of a pre-filter, an True HEPA filter, and an activated carbon filter.
  • Advanced air quality sensor options, a smart app, and auto mode are just some of the features that adorn this device.
  • DREO offers the option of an extended warranty of up to 5 years.


Below is a table with the basic specifications of the DREO Marco Max S air purifier.

Manufacturer DREO
Model Macro Max S
Dimensions 11.22 x 11.22x 20.86 inches (28,5 x 28,5 x 53,0 cm)
Weight 11.89 lb (5.35 kg)
Filters Pre-filter, H13 True HEPA Filter, and Activated Carbon Filter
Filter Longevity 6-8 months
Room Coverage (4.8 ACH) 423 sq. ft.
Number of Fan Speeds 5 – Sleep Mode, Low Mode, Medium Mode, High Mode, and Turbo Mode
Power Consumption 56W
Warranty 5-year

Setup and Installation

Before switching on the DREO air purifier, you must make specific preparations, mainly for unpacking and getting ready for first-time use.

First, unpack the air purifier from the transport box. Peel off all protective foils and tapes, open the cover on the back of the device and pull out the filter. Next, remove the filter from the plastic packaging and insert it back into the machine, ensuring that the straps face outwards.

After preparing the filter, the next step is to position the air purifier in the desired location, ensuring that it is at least 15 inches (38 cm) away from the wall and that the air purifier is placed on a firm surface.

Under no circumstances block the air inlets on the bottom and the air outlets on the top of the device.


When it comes to the design of the DREO Macro Max S, it is very different from the other air purifiers I have tested so far and that I have generally come across on the market. In fact, this air purifier is very stylish, and the build quality is even reminiscent of some premium devices such as the Molekule Air.

The quality of the plastic, workmanship, color, and design are top-notch, especially for this price range. This air purifier is available in silver, with black detailing, which makes its appearance so elegant.

DREO Macro Max S Air Purifier - In Front of the Office Desk
The DREO Macro Max S in front of the office desk.

The DREO comprises two parts: the lower part contains the filter, and the upper part has all the device controls. Another detail that caught my eye is the Air Quality Indicator on the device, which extends through the entire device’s height and lights up in different colors according to the air quality. This elegantly designed indicator gives the DREO air purifier an extra luxury.

A drawback is a lack of carrying handles, especially since this is not a fully portable air purifier and is a little heavier than it looks. There are rubber plugs at the bottom to prevent the air purifier from slipping, which is good, especially if the room’s surface is slippery. Overall, I think the DREO Macro Max S fits into almost any environment and potentially brightens your room.

Controls and Indicators

The DREO Macro Max S has two different control options. The first is via the control panel located on the top of the device, and the second is via the DREO smart app, which I will explain in more detail later in this article. The control panel on the device consists of touch buttons and indicators. 

DREO Macro Max S - Controls and Display
The DREO air purifier controls, indicators, and a display.

The buttons on the panel are the power, timer, auto mode, fan speed, sleep mode, and information buttons. The touch buttons are sufficiently sensitive, well-spaced, and easy to use.

One fascinating detail that caught my eye was the display located on the front, in the top right-hand corner. The display is made up of several parts and always shows the current fan speed and all the other indicators when they are active, such as the timer, Wi-Fi, child lock, and filter reset indicator.

In addition, you can read the current amount of PM2.5 in the air, directly on the display. The information shown on the display can be changed by pressing the information button on the control panel so that instead of PM2.5, it can display the percentage of air quality cleaned and filter wear information. It is up to you to decide what you want to show.

Below the display is an air quality indicator that glows in different colors depending on the air quality, further complementing the already stylish look of this air purifier.

DREO has a memory option, meaning it remembers the last settings you used and continues working on the same ones when you switch it off. This does not apply to the timer option.


The DREO Macro Max S is a rectangular-shaped air purifier with slightly rounded edges. This air purifier consists of two parts, the lower part where the filter is located and the upper part where the motor, control panel, and air quality sensor are located.

The device draws air through openings in the lower part, located at the sides and rear. The air is then filtered and exits through the grilles on the upper side.

Size and Dimensions

The air purifier weighs 11.89 lb (5,35 kg). The machine’s dimensions are 11.22 x 11.22 x 20.86 inches (28,5 x 28,5 x 53,0 cm). The DREO is not a very large air purifier, but it is a bit heavier than I expected, so I feel that the lack of carrying handles may be a problem.

What’s in the box?

When you buy the device, you get a Dreo Macro Max S air purifier,  3-in-1 H13 True HEPA filter,  quick start guide, and 1x user manual.

I can’t help but mention that I’m impressed with the packaging of the DREO air purifier. It’s been a long time since I’ve seen a device so well packaged, with the filter vacuumed inside the machine and such high-quality printing on the user manual. That being said, a big plus from me for this.

Features Overview

The DREO Macro Max S is a smart air purifier with several advanced options and additional features activated by connecting to a smart app.

Options such as the air quality sensor, air quality indicator, auto mode, and smart app are all part of this device, and these are options that will make the daily use of the air purifier much easier. Without further ado, I will describe below all the basic features of this air purifier.

Air Quality Sensors and Indicators

The air quality sensor is personally my favorite feature on this device. I simply like machines with an air quality sensor, as I want to know the current air quality in my home at any given moment.

This sensor is located at the back of the device, right on top of the filter cover. It detects PM2.5 particles in real-time and works in combination with some of the other options on the device. DREO claims to use a high-quality air quality sensor that will quickly, efficiently, and accurately detect the current air quality.

DREO Macro Max S Air Purifier - Air Quality Sensor
The air quality sensor, located on the back of the device.

The air quality indicator on the front of the device lights up in different colors depending on the current air quality. In the table below, you can see which color indicates which air quality. In addition to the air quality indicator, there is also a display where you can read the current amount of PM2.5 in the air at any time.

DREO Macro Max S Air Purifier - Air Quality Indicator
The air quality indicator is placed on the right, near the bottom of the device.

Best of all, you’ll be able to monitor even more detailed air quality analysis via the DREO smartphone app, where you’ll see hourly data alongside historical data.

Light ColorAir Quality Level
The air quality sensor detects PM2.5 particles, but it can’t detect odors, so if you notice a high level of odors in your home, manually increase the fan speed.

Auto  Mode

Auto mode is another option that works in combination with the air quality sensor. Basically, when in Auto mode, the air purifier automatically switches the fan speed according to the current air quality.

Additionally, suppose you connect the air purifier to a smart app. In that case, you can select additional settings for Auto mode in the app.

So you can select the “Standard” settings for Auto mode and the “Soft” settings.

In short, this is an exciting option that allows you to turn the device on, switch it to auto mode and completely “forget about it”. At the same time, the air in your home remains exceptional.

Sleep Mode

This mode is for people who plan to use an air purifier in their bedroom. Namely, when you switch to Sleep Mode, the device changes the fan speed to the lowest setting and dims all the indicators on the device.

After switching to Sleep Mode, all indicators on the device will dim within 5 seconds.

Light Detection

DREO Macro Max S Air Purifier - In Front of the Office Desk
The DREO Macro Max S in front of the office desk.

The DREO Macro Max S has a built-in light sensor that detects light intensity in the environment. If there is not enough light or if it is night, all LED lights will turn off. It is important to note that if you do not want light detection, you can deactivate this option in just one step via the smartphone app.


A timer is a great option that I find to be an integral part of almost all air purifiers I’ve tested so far. The timer is used to set the time you want the device to switch itself off. By pressing the timer button, you can set the timer between 1-12 hours. What surprised me is that you can only set the timer between 1-12 hours via the smartphone app and minutes via the app, but only round hours directly on the device.

Display Info

I have already touched on the information display when explaining the device’s controls. Again, it doesn’t hurt to mention that this display is a handy feature that initially shows the amount of PM2.5 in the air. You can change what you want the display to show by pressing the “Info” button. This can be the percentage of air cleaned or the current filter wear.

Smart App

The DREO air purifier uses a smart app for Android and iOS devices. This app is not mandatory, but it is absolutely recommended as it opens up many additional options and possibilities that are not available directly on the air purifier. I will tell you more about the DREO smart app below, where I will describe all the essential features of the app.

Child Lock

DREO Macro Max S Air Purifier - Fan Grilles
DREO air purifier fan grilles.

This is an option that is only available via the DREO smart app. As the name suggests, the air purifier will not respond to any button press when you activate Child Lock. This way, you prevent children messing with your settings or switching the assigned commands.

Safety Lock

For your safety, the DREO automatically switches off if the filter cover is opened during operation or if the filter cover is not closed correctly.


I must say that I am positively surprised by the generous warranty of the DREO, which lasts for a full 5 years. Just a few air purifiers have such a guarantee, which is a confirmation that DREO is a competitive brand.

Please note that you must register the purchased device via the DREO website in order to activate the registration.

DREO Smart App

Recently, more and more new air purifiers can connect to a smart app. Many brands invest a lot of heart into developing apps and their various innovations. The DREO app is available on Android and iOS devices, it’s easy to activate and even easier to customize, and the app works very smoothly.

Not only will you be able to remotely control your home by connecting to the DREO app, but you will also open up many other options and possibilities that are only available through the app. For example, you will get a much more detailed view of the current air quality and a historical view of the air quality by day and month.

DREO Macro Max S Air Purifier - In the Bedroom
DREO air purifier in the bedroom.

In addition, options such as voice control or manual fan speed adjustment are just a few of the additional options offered by this app. Although it is not compulsory, I recommend everyone to connect the DREO air purifier to a smart app, you will not save anything, but you will gain many benefits.

Essential Settings and Adding Devices to the App

Essential Settings and Adding Devices to the App
Essential settings and adding devices to the app.

Before you can start using the DREO smartphone app, you must download and install it. Then open the app, register with a valid email address, and log in to the app after a successful registration.

After logging in to the app, proceed further by pressing the “+ Add device” button to add/connect your air purifier to the smartphone app. All you need to do is to follow the on-screen instructions, and in just a few steps, your DREO Macro Max S is successfully connected to the smart app.

Functions and Controls in the App

Functions and Controls in the App
Functions and controls in the app.

When you connect to the app, you will see a brand-new interface with many options. So you’ll be able to turn your device on or off from anywhere with just one press of the power button.

Under the start option, you’ll see a display of the current air quality, the amount of PM2.5 in the air, and the air quality percentage. Clicking on this box will display the air quality by hour, day, and month. Immediately below is a display of the current filter wear.

Behind these two fields is a section to control the device, where you can switch to one of four modes: Auto, Turbo, Sleep, and Manual mode. I find the Manual mode the most interesting, which basically allows you to switch the fan speed to one of 18 different speeds.

Under the commands are all the other options necessary for the device’s operation, namely the Timer option, the option to turn off all the indicators on the device (“Light”), and then the option to turn off the sound when you press a key. The touch button “Panel Sound” and the option to switch on/off the light sensor (“Light Detection”). Below you will also find settings for Child Lock, Display Info, Auto Mode settings, and some others, including options for setting voice controls.

Filtration Technology

The DREO uses a 3-stage filtration technology consisting of a pre-filter, an H13 True HEPA filter, and an activated carbon filter. The filter is cylindrical in shape, identical to many air purifiers of similar design. It is located in the lower part and occupies almost half of the unit. It is surrounded by air inlets at the sides and rear.

DREO Macro Max S Air Purifier - H13 HEPA Filter
DREO air purifier uses a high-quality 3-in-1 filter.

I do not recommend washing the filter as it is not washable. The HEPA is essentially a paper filter that, if crushed, would most likely fall apart and almost certainly lose its effectiveness. It is also important to note that the DREO is CARB certified, which means that it is approved by strict California law and is entirely safe to use. It also means that it produces ozone in the quantities the law allows or not at all.

DREO Macro Max S Air Purifier - Replacement Filter

DREO Macro Max S Replacement Filter

Always buy genuine filters for the best performance. As soon as the filter reset indicator is on, you are ready to change filters. Do it as quickly as possible.

Check Filter Price On Amazon

This filter should never be exposed to a humid environment or soaked in water, as damage is guaranteed.


The pre-filter is the first stage of filtration. It is essentially a nylon mesh attached to the HEPA filter. It is designed to trap any large particles, such as hair, large dust particles, and other dirt, thus extending the life of the HEPA filter.

It is essential to clean this filter at least 1-2 times a month, either with a vacuum cleaner or with a dry cloth. This way, the filtration will be much better, and the HEPA filter will last longer.

H13 True HEPA Filter

The H13 HEPA filter is the second level of filtration. This filter is medical grade, which means it can be used in hospitals and is much more efficient than HEPA, H12 HEPA, and similar filters.

DREO Macro Max S Air Purifier - The Top Side of the Filter
The filter’s top side.

DREO claims that this filter traps 99.97% of airborne particles down to 0.3 μm in size, including allergens, pet dander, and pollen. In addition, the SGC filter is tested to filter out certain bacteria. Overall, the quality of this filter has been confirmed in our performance tests, where the DREO Macro Max S achieved fantastic results.

Activated Carbon Filter

The third filtration stage is the pellet-based activated carbon filter, which aims to neutralize odors. This filter neutralizes various odors, smoke, harmful gases, and VOCs. It is ideal for households with pets, in the kitchen, and in smoking rooms.

I must mention that I tested the DREO for some time in the kitchen, and it gave okay results!

How to Replace the DREO Filter?

This air purifier uses non-washable filters, which cannot be washed and need to be replaced from time to time. You don’t have to manually keep track of the replacement time because the DREO has a filter reset indicator that will let you know when it’s time to change the filter. You will receive the notification directly on your device and via the smartphone app.

The filter on the DREO Macro Max S lasts 6-8 months on average. In addition to regular filter changes, it would be a good idea to clean the pre-filter (first layer of filtration) two times per month. This can be done with a vacuum cleaner or with a dry cloth.

So, when the filter reset indicator lights up, the filter needs to be changed. The replacement process itself is straightforward and consists of only a few steps:

Total time: 10 minutes.

Step 1 – Opening Filter Cover

Unplug the air purifier from the power source and open the cover on the back.

Opening Filter Cover.

Step 2 – Pulling Out Old Filter

Then, pull out the dirty filter and disposal it properly.

Pulling Out Old Filter

Step 3 – Vacuuming Inside

It would be a good idea to vacuum the inside of the filter housing with a vacuum cleaner to pick up any redundant dust.

Vacuuming Inside

Step 4 – Placing a New Filter

Next, unpack the new filter and insert it into the air purifier while ensuring the filter pull-out straps face outward.

Placing a New Filter

Step 5 – Resetting a Filter Reset Indicator

The final step is resetting the filter reset indicators by holding your finger on the “Info” button for 5 seconds or using the DREO smartphone app.

Resetting a Filter Reset Indicator

Noise Test

I can’t help but say that I am simply amazed at this air purifier’s number of fan speeds. In addition to the standard 5 fan speeds that you can select directly on the controls panel, there is also a manual speed selection via the smart app through which you can choose between 18 different speeds, which basically means that you’ll find it much easier to adjust the speed that suits you.

Plus, it uses a brushless motor that produces much less noise than standard motors.

DREO Macro Max S Air Purifier - Noise Test
I used a special noise measurement tool when testing noise levels.

When testing noise levels, I did not test the manual mode, but I did run tests on 5 essential speeds. I used a unique noise levels measurement tool that I use for all my reviews.

Overall, I am delighted with the results, especially in sleep mode, where the DREO produces a sound of only 42.1 dBA, which is very good, especially if you plan to use the air purifier in the bedroom.

In turbo mode, the highest speed on this device, it produces a sound of 64.7 dBA. Expectedly much higher than in sleep mode and other speeds, but it is on par with the competition and many similar air purifiers, so I have no complaints about this mode.

Speed Value (dBA)
Sleep Mode 42.1 dBA
Low Mode 44.3 dBA
Medium Mode 50.9 dBA
High Mode 57.1 dBA
Turbo Mode 64.7 dBA

All in all, the DREO Macro Max S performed very well in the noise tests, and I think you will easily find a balance between the fan speed and the volume it makes, especially with the manual mode. I highly recommend this air purifier for the bedroom!

Performance Tests

The DREO Macro Max S is not a very large air purifier, but it covers rooms up to 423 sq. ft. This air purifier cleans the air in a room of this size 4.8 times in one hour. Accordingly, I have performed out two tests, which I will show below. One is in a room a little smaller than the recommended dimensions, and the other is in a room a little larger to see what the capabilities of this device are.

The DREO uses TurboPure X enhanced aerodynamics to improve performance for an impressive 50% faster cleaning.

DREO Macro Max S Air Purifier - Performance Tests
I used the Temtop laser particle meter when performing performance tests.

In addition, I have put the DREO through various other tests. For example, it has been very good at neutralizing odors and performing well in the kitchen. Also, it neutralizes the smell of smoke very quickly and effectively.

All these are additional proof that, together with the tests presented below, show the seriousness of the DREO Macro Max S air purifier.

320 sq. ft. Room Test

In the first test, I placed the DREO Macro Max S in a 320 sq. ft. room. In this room, the DREO improved the air quality by an incredible 96% in 60 minutes of Turbo Mode operation, confirming that it is a highly efficient and reliable air purifier.

# Starting Baseline After 60min
PM 2.5 104 5.2
PM 10 145.6 7.2
Particles 150848 7582
AQI 136 7

To be honest, I am positively surprised and delighted with this test’s results, which confirm the quality of the H13 HEPA filter used by this air purifier.

560 sq. ft. Room Test

I decided to test this air purifier in a room larger than recommended to see how far the DREO could exceed its performance. I have to say that I was positively surprised and that although the DREO Macro Max S stumbled a little, it performed excellently on the test.

In a room of 560 sq. ft., in 60 minutes of operation, on Turbo Mode, this air purifier improved the air quality by approximately 88%, which, I repeat, is a fantastic result, given that it is designed for rooms of much smaller dimensions.

# Starting Baseline After 60min
PM 2.5 102.4 12.7
PM 10 143.3 17.9
Particles 148569 18559
AQI 134 16

Operating Costs

Although the DREO Macro Max S uses a motor of 56W, I have to say that I am satisfied with its consumption and that this is a very well-optimized air purifier. Namely, this air purifier consumes only 6.3W in Low Mode, while in Turbo Mode, it consumes 36.1W. This means that your electricity bill would increase by approximately $3.16 if you used this air purifier in Turbo Mode 24 hours a day for one month. This is not such a huge cost, especially considering this air purifier’s airflow.

In addition to the electricity costs, there are also filter replacement costs, which usually need to be changed about 2 times a year. Fortunately, the cost of replacement filters is not high. What is interesting, and what I found when analyzing the price of replacement filters, the electricity consumption, and the price of the device itself, is that this air purifier is almost identical to the Levoit Core 400S, so it will be an absolute pleasure for me to compare these two and see which would be better.

Speed Power Usage (W)
Standby 0.8W
Sleep Mode 3.3W
Low Mode 6.3W
Medium Mode 10.5W
High Mode 18.2W
Turbo Mode 36.1W

Summing up the power consumption and the price of replacement filters, we can conclude that the DREO Macro Max S is affordable for annual maintenance.

DREO Macro Max S Video Review

DREO Macro Max S is my recommendation, but before you make a final decision take a look at this powerful air purifier in the video above.

FAQ on DREO Macro Max S

Does the Dreo Macro Max S produce ozone?

DREO does not produce ozone in unallowed amounts, as certified by CARB. CARB is a certification issued by California that ensures that an air purifier does not produce illegal quantities of ozone and can be sold freely in California.

How often should I change the filters on my DREO air purifier?

The DREO does not use washable filters, meaning you must change them periodically when the filter reset indicator appears. The filters on a DREO air purifier last 6-8 months on average.

Is it mandatory to connect the air purifier to a smart app to work properly?

No, it is not. However, by connecting to the smart app, you open up many options and possibilities that are only available through the app, so it is my warm recommendation and suggestion to connect to the app.

What is the warranty on this model?

The DREO Macro Max S comes with a highly generous 5-year warranty. However, to activate the extended warranty, you must register on the DREO website and follow the steps to extend your warranty.

Pros and Cons

To revise, here are the advantages and disadvantages of the DREO Macro Max S air purifier:


  • 3-stage filtration technology
  • Smart DREO app
  • H13 HEPA filter
  • Brushless motor
  • Air quality sensor
  • Intelligent air quality monitoring
  • Auto Mode
  • Covers rooms up to 423 sq. ft.
  • Manual operation with up to 18 fan speeds
  • Voice control
  • Filter last 6-8 months


  • No carrying handles
  • It could have more carbon pellets in the filter

Final Thoughts

There have been a lot of different brands on the market lately. Somehow I get the impression that the practice is for brands to start producing lower-quality devices first, which are then improved over time, or new, better models are released. This is not the case with the DREO Macro Max S, which is a complete, high-quality, and, I can say, very competitive air purifier.

To be honest, the DREO pleasantly surprised me in almost all tests. It performed well in the performance test, passed the noise level test perfectly, and is not expensive to maintain. In addition, the DREO smart app works flawlessly, the air quality sensor is fine, and the design is very luxurious.

All this, together with the excellent price-performance ratio, is more than enough reason to make the DREO Macro Max S my absolute recommendation.

Suppose you have any questions about this air purifier. In that case, you can leave a comment in the comment box below the article.



Review Breakdown





Operating cost


Value for money


Ease of use


2 responses to “DREO Macro Max S Air Purifier – Trusted Review (2023)”

  1. Anonymous

    Does this produce any ozone I am sensitive to ozone

    • Milan Antonic

      This air purifier is CARB certified, which means it’s safe to use. But, it produces an insignificant amount of ozone, so if you are ozone-sensitive, I suggest trying another air purifier.

      You can check the Levoit Core 400S, which is equivalent to this DREO air purifier.

Leave a Reply

Your email address will not be published. Required fields are marked *