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Overview

Keep the air in your room clean and fresh with the Blueair Blue Signature large replacement filter. This genuine filter precisely fits the Blueair Blue Signature SP4i air purifier and captures 99.97% of particles as tiny as 0.1 microns. With HEPASilent dual filtration technology, it purifies faster, quieter than standard HEPA filters.

Blueair Blue Signature Replacement Filter - Large

Model: Blueair Sig L Fltr
Web Code: 19723831
Sold and shipped by Best Buy

Available for deliveryAvailable online only

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30 days to return or exchange

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Manufacturer's Warranty

Check with the manufacturer for details or add Best Buy Protection for extra coverage.

For Quebec residents: See the Availability Guarantee disclosure in the Specifications section below.

What's included:

  • Air Purifier Filter
  • Patent-pending replacement filter designed and tested exclusively to fit Blueair Blue Signature SP4i air purifier
  • Ensures seamless compatibility and delivers peak purifier performance with every replacement
  • Six-layers of filtration trap 99.97% of airborne particles as small as 0.1 microns, including pollen, dust, pet dander, and smoke
  • HEPASilent dual filtration delivers faster, quieter, and more energy‑efficient purification than standard HEPA filters
  • OdorFence technology uses bio-based enzymes and minerals to neutralize odours and gases
  • With a lifespan of up to 12 months, it ensures extended use and consistent performance
  • Proprietary RealTrack algorithm monitors actual usage and sends precise alerts when it's time to replace
  • Quick‑swap design ensures hassle-free maintenance and allows easy replacement without the need for tools

For Quebec residents – Disclosure under the Consumer Protection Act

In compliance with Bill 29, Best Buy and third-party sellers on Best Buy Marketplace do not guarantee the availability of replacement parts, repair services, or maintenance information for any products. Coverage provided through any Best Buy Protection programs and applicable manufacturer warranties, if any, remain in place. Please contact the manufacturer directly for information about their availability guarantee.