Blueair Classic 605 Review

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Updated March 4, 2023
76 Expert Rating

Having an air purifier in your house allows you to breathe good, high-quality air, and if you tend to suffer from respiratory conditions, having the Best Air Purifier overall, or the Best Purifier for Allergies and Asthma, can be very much worthwhile, especially if the air around the region or city that you live in isn’t as good as it could be.

The Blueair Classic 605 is a great example of what a highly-rated air purifier is, and with enough power to handle a room size of almost 700 sq ft, it would be perfect for anyone with large rooms. However, we wouldn’t go as far as claiming that it’s the best large room air purifier. At the cost of almost $800, its pricing is in the region of what you’d expect to pay for the best smart air purifier, so you can bet that it’s got a lot of features in store.

Why We Like It – Blueair Classic 605

The Blueair Classic 605 boasts of HEPAsilent filtration technology, is WiFi enabled, and can be used for large room sizes of almost 800 square feet, and with a body that’s built of steel, it’s going to be in good working condition for a long time.

  • Allows for Smartphone control through the Blueair Friend App since it’s WiFi enabled
  • HEPAsilent filtration allows for more efficient functioning
  • 5 air changes per hour
  • Expensive


The Blueair Classic 605 is a pretty powerful unit, with a Certified Clean Air Delivery rate (CADR) of 500 cubic feet per minute. It’s also got 3 fan speeds, giving you options as to how you’d like to use it. Its filtration process involves the use of Hepasilent Filtration technology, and this, together with its true HEPA filter, allows it to capture up to 99.97% of particles such as dust pollen, mold, and pet dander. The technology combines mechanical filtration with the use of an electrostatic charge to be efficient, and is capable of doing up to 5 air changes per hour. The Classic 605 is different from the Rabbit Air Minusa2 Air Purifier in that it’s got a dual protection filter, and this is basically a carbon filter that helps get rid of smoke and bad odors, making sure that the air quality in your home remains nice and fresh.


With an energy star certification, the Blue Air Classic 605 is a very efficient unit in terms of performance, so it will hardly have your electricity costs jump from what they currently are. Of course, this model is quite expensive during the purchase, but you can check out the Blueair Classic 605 air purifier review for a more affordable air purifier. Its 3 different fan speed options give you the opportunity to use it on the lowest setting so that it can consume even less power. Alternatively, you could also switch it to night mode to keep it quiet and emit less light, but on the Airmega 400S, this would be a more automatic process thanks to its ability to sense ambient light.


The use of Hepasilent technology on the Classic 605 is something you won’t find with many other air purifiers. This technology makes the work of the true HEPA filter a little easier since it electrifies particles and pollutants, and once they gain electrostatic attraction, they get drawn onto the HEPA filter faster, hence hastening the whole process.


Unlike the Bissell air purifier, which is largely made of plastic, the Classic 605 sports a durable steel body, making it a lot more likely to stay in good shape over a longer period. A 1-year warranty also backs the unit, so you can bet that you’ll get continuous support even after you purchase the unit. There’s also a filter change indicator on the control panel to let you know exactly when you ought to do a filter change, so there’s no guessing that you’d have to for when you need to get new HEPA filters.

However, if you want to avoid regularly buying filters, you might want to look into the best air purifier with a washable filter.


You’ll be able to connect the Blueair Classic 605 to your smartphone thanks to its support for WiFi connectivity, and you’ll be able to manage the air purifier through the Blueair Friend App. Through it, you’ll also be able to get notifications on when filter replacement is due, monitor air quality through Blueair Aware, or even regulate the airflow by changing the unit’s fan speeds. You may also want to review our Blueair Sense air purifier review to find another one with smart capabilities.

Blueair Classic 605 Wrap Up

Keeping your indoor air clean should no longer be a problem with the Classic 605 Blueair air purifier, as long as you get its replacement filter when needed. If you’re not quite sure yet as to whether this is the right product for you, go ahead and see what other customers have to say on its Amazon page. This way, you’ll be able to make a more informed decision.

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