Blue Signature SP4i Large Replacement Filter

Blue Signature SP4i Large Replacement Filter

£59.00

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Back in stock: 08/10/2026

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Product description

Key Benefits

• Compatible with the Blue Signature™ SP4i Large.
• Captures dust, pollen, pet dander and other airborne particles.
• Easy to replace for simple maintenance.
• Durable design for long-lasting performance.
• Works with RealTrack Technology® for accurate filter life monitoring.

The Blue Signature™ SP4i Large Replacement Filter is designed exclusively for use with the Blue Signature™ SP4i Large air purifier. It helps maintain powerful air purification by capturing common airborne allergens such as dust, pollen and pet dander, supporting cleaner, fresher indoor air.

Made from durable materials, the filter is built for long-lasting performance and quick, hassle-free replacement, making routine maintenance simple. RealTrack Technology® accurately monitors filter life and alerts you when it's time for a replacement, helping ensure your air purifier continues to perform at its best.

Why Blueair is Healf

Blue Signature™ SP4i Large combines HEPASilent™ filtration with OdourFence™ Technology to remove both airborne pollutants and unwanted household odours. HEPASilent™ filtration captures at least 99.97% of airborne particles as small as 0.1 microns, including fine dust, pollen and other microscopic pollutants, while OdourFence™ Technology captures and breaks down common odour-causing gases rather than simply masking them. This advanced seven-stage filtration system helps you enjoy cleaner, fresher indoor air throughout larger living spaces.

Blueair was founded in 1996 in Stockholm by Bengt Rittri, driven by a simple goal: to ensure his children could breathe the same clean air indoors as they did in the Swedish archipelago. With a deep commitment to environmental responsibility, Rittri built Blueair into a global brand focused on healthier indoor living. The brand develops high-performance air purifiers using precision-engineered filtration technologies designed to capture airborne particles, allergens, and pollutants efficiently and reliably. Each system reflects a science-led approach, combining smart design with carefully tested components to deliver consistent air quality. Through this commitment to clean, effective solutions, Blueair helps create healthier homes so you can breathe easier every day.

With our Healf Curation Process, we do the work for you. Shop with confidence knowing that every item has been tried, tested, and curated for you.

Learn more about each step—Brand Discovery, Expert Validation, and Community Testing— here.

Suggested use

For use with Blue Signature SP4i Large air purifiers. Replace filter every 12 months.

Recommended pairing

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