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AEG AX91-404GY review

£379.00 View retailers

Test scoreShow Context

Key features

    At first glance, the AEG AX91-404GY, also known as the AX9 400 AP, doesn’t look like an air purifier, as its grey mesh covering makes it look more like an audio speaker. With a five-stage filtration system and an app that lets you control your home’s air quality even when you’re not there, is this air purifier the key to consistently clean air? Read our review to find out.

    Included in our expert review
    • Pros and cons
    • What is it?
    • What’s it great at?
    • Is there anything I should watch out for?
    • Is there anything else I need to know?
    • Should I buy it?
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    Last checked by Which?

    August 2021

    First reviewed by Which?

    September 2020

    Released

    April 2020

    Test results

    The overall Which? test score is made up of the following star ratings, all determined by our rigorous lab tests.

    Find out how we test air purifiers>
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    Make smarter choices

    We have tested 39 air purifiers and found that there are 3 Don't Buys and 6 Best Buys.
    Range of Air purifier scores
    1. 25%
      Lowest score
    2. 64%
      Average score
    3. 85%
      Highest score
    We'll show you where this model sits on the scale so that you can see how it compares to air purifiers we've tested
    First month only £5, then £9.99 per month, cancel any time

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    Our Test Labs compare features and prices on a range of products. Try Which? to unlock our reviews. You'll instantly be able to compare our test scores, so you can make sure you don't get stuck with a Don't Buy.

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