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Blue Signature™ Large Replacement Filter
Blue Signature™ Large Replacement Filter
Blue Signature™ Large Replacement Filter
Blue Signature™ Large Replacement Filter
Blue Signature™ Large Replacement Filter
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Blue Signature™ Large Replacement Filter
Blue Signature™ Large Replacement Filter
Blue Signature™ Large Replacement Filter
Blue Signature™ Large Replacement Filter
Blue Signature™ Large Replacement Filter
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Blue Signature™ Large Replacement Filter

Compatible with Blue Signature™ Large Air Purifier

4.8
Rated 4.8 out of 5 stars
9 Reviews
Use code FILTER15 for 15% off
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This filter is only compatible with the Blue Signature™

  • Designed for easy replacements, ensuring hassle-free maintenance for continuous clean air
  • Crafted with durable materials for a long-lasting filter
  • Effectively captures allergens like dust, pollen, and pet dander

  • Alerts when you need a new filter
  • RealTrack Technology® filter monitoring
  • Double* the
filter lifetime

Smart filtration, you can trust

7 stages of filtration,
10x more odour removal


HEPASilent filtration technology captures at least 99.97%² of tiny airborne pollutants down to 0.1 microns while OdourFence Technology captures common odour gases and breaks them down. It’s deep, effortless clean air you can feel, and smell, every day.

  • Ship next day free

  • 30 day home trial

  • Authenticity guaranteed

4.8
Rated 4.8 out of 5 stars
Based on 9 reviews
Total 5 star reviews: 8 Total 4 star reviews: 0 Total 3 star reviews: 1 Total 2 star reviews: 0 Total 1 star reviews: 0
89%would recommend this product
9 reviews
  • SS
    SINA S.
    Verified Buyer
    3 minutes ago
    Rated 5 out of 5 stars
    Easy to Install.

    Great and easy to install.

  • RD
    ROBERT D. W. J.
    Verified Buyer
    1 week ago
    Rated 5 out of 5 stars
    Easy to replace, lasts a long time.

    The replacement was very easy to put on my unit. The app on my phone walked me through all the steps. Nice!

  • CH
    Charles H.
    Verified Buyer
    2 weeks ago
    Rated 5 out of 5 stars
    Blue Air Signature

    Five stars for PM1,2.5,10 removal and ease of operation. One star for ability of OdorFence to remove persistent odors from a room.

  • CS
    Cindy S.
    Verified Buyer
    1 month ago
    Rated 3 out of 5 stars
    No option to have first delivery delayed

    I didn't need the filter this soon after purchasing the unit in January, but I wanted to activate the additional warranty and to join the filter subscription program. Unfortunately, there was no option to delay delivery for 9 months, so I guess I will know in 9 months, when it is due for a change, if I like the filter or not.

    BU Profile picture for Blueair UK
    Blueair UK
    4 weeks ago

    Thank you for joining our filter subscription program and for activating your extended warranty for your Blue Signature. We appreciate you planning ahead. We understand timing matters. Within your subscription, you can easily skip, delay, or pause upcoming shipments directly from your Blueair account to better match your replacement schedule. If you would like help adjusting your next delivery, please don't hesitate to reach out to our support team. We'll be happy to assist.

  • MH
    Mathew H.
    Verified Buyer
    1 month ago
    Rated 5 out of 5 stars
    Replacement filter

    I was forced to purchase a factory filter because Blueair makes it difficult to figure out what the correct filter is for your machine. So rating to filter is useless really.

² Tested on PM2.5 up to 90 minutes.