Blueair Classic 203 Slim HEPA Silent Air Purification System Review

This is a good quality air purifier for those on a budget since the Blueair Classic 203 slim HEPA silent air purification system is half the earlier models. When choosing an air purifier, it can seem not very easy, but if you know what you should be looking for, it can be made easier. This is a sleek and elegant looking machine that we will review, so keep reading on more to find out what makes the Blueair Classic 203 slim HEPA silent air purification system a top choice.Blueair Classic 203 Slim HEPA Silent Air Purification System Review


  • Made of the highest quality materials
  • Has all of the features of the higher-end model for a lower price
  • 5-year warranty


  • Low ACH and CADR ratings
  • Pretty noisy for a small space
  • Filters are expensive for the price made for the machine

Design, Size, and Placement

This is a 21” machine, and the Blueair Classic 203 slim HEPA silent air purification system isn’t the best in terms of design. It is larger than other models, but the body is made of durable steel that makes us feel certainty and power when looking at it. There is an LED on and off indicator at the front of the model that makes it very easy to use when it is in place, but you can’t change how long you want it to operate for.

However, because this is a larger model, it isn’t going to be as easy to move around as other options, so you will need to find the right spot for it. Also, there are no casters, making it even harder to move, so place it in a central location where it can reach the entire space. You might not want to place this in your bedroom or even your office since it can be quite a bit noisier than some other options, especially those that have carpet since it can make it much harder to place it.

How It Works and What Sources of Indoor Pollution it Destroys

The Blueair Classic 203 slim HEPA silent air purification system only has a single filter there, but it is the smoke stop or the particle filter. This means that the single filter will be able to remove all of the larger and the smaller particles that might be floating around in the air. The particle filter can remove viruses, bacteria, mold spores, pet dander, dust, and pollen, or you can purchase the more expensive smoke stop model.

Key Features

The Blueair Classic 203 slim HEPA silent air purification system can handle a room of about 240 square feet, which means it is perfect for smaller rooms or apartments. There are a few features and additional features that you need to be aware of when it comes to this model, such as:

  • Ability to change out the filters depending on your need and budget
  • A timer that can be removed to notify you when the filters should be replaced
  • Compact design in terms of the fans
  • Durable and sturdy exterior to ensure it lasts a long time
  • Can purchase various accessories for the machine

These are just some of the main features that one wants to be aware of when looking at the available options.

Noise Level

If you are looking for something that will be quiet and perfect for a bedroom, then the Blueair Classic 203 slim HEPA silent air purification system is not the right option. This one is great for cleaning the air, but it isn’t very quiet, even on the lowest available setting. The lowest noise level you can get for this machine is 32dB, which is a lot noisier than other available options. The highest setting has a reading of 56dB. This isn’t going to be an ideal machine for a bedroom, but it can work in an office space or a public setting where the noise won’t matter.


There are also other important statistics that you need to know about the Blueair Classic 203 slim HEPA silent air purification system like the CADR ratings. When it comes to smoke, dust, and even pollen, this machine has a capacity of 263 m3 every hour. It can clean the air around 5 times in the smaller room every hour, depending on the speed level that you choose. This can be something to consider since other models would have higher ratings and better cleaning of the rooms faster.

Maintenance and Upkeep

This machine requires you to replace the filters rather than just cleaning them, which is an expensive proposition considering machine costs. The filters would need to be replaced at least 2 times every year, but this is easy. Ensure that you have the required filters ready and available and that you are cleaning out the door in the front of any debris or dirt when you are doing this. A timer will let you know when the filters need to be replaced, which makes the upkeep of this model relatively simple if a bit more on the expensive side.

Final Thoughts

For those looking for something that isn’t going to break the bank while still cleaning the air at a decent speed, then the Blueair Classic 203 slim HEPA silent air purification system is good. However, if you are searching for something that will be quiet and useful in your bedroom or other small space, this isn’t the best. The price is great, but this is not an easy model to move around your home or even push around on castors like other models. If you don’t mind a bit of noise and if you want to keep it in a single space, then this is the machine for you, but otherwise, it might not work for you all that well.

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My name is Ryan. I have had a hard time dealing with my allergies. Happily, I found that an air purifier was effective to ease my allergy symptoms. I spent a lot of time researching the best air purifier. I know how hard it can be to find the suitable one. During the reading period, I also read a lot about humidifiers and dehumidifiers. I learned the mechanisms behind the technologies as well as the manufacturers and organizations within the industry. I now feel convinced that I have built a guide that shows you all you need to know about air purifiers, humidifiers, and dehumidifiers. So I came up with the idea of creating this website.

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