Blueair Blue Signature SP1i Air Purifier

Sees what you can't

✔SMART VOC SENSING

Most air purifiers this size only measure particles. The SP1i also tracks volatile organic compounds – the gases released by cleaning products, paint, new furniture, cooking and adhesives. You get a real picture of your air, not half of one.

✔AUTO MODE THAT ACTUALLY REACTS

Built-in PM2.5 and gas sensors feed Auto Mode continuously, so fan speed rises when you start cooking or open a window onto a smoky street, and settles again once the air clears. No dial-watching required.

✔GLANCEABLE AIR QUALITY

The air quality indicator shows current pollution levels across five colours, from blue for excellent through to red for poor, with a subtle animation while it is actively cleaning.

Superior filtration

✔7-STAGE HEPASILENT™ FILTRATION

HEPASilent™ pairs mechanical filtration with an electrostatic charge, so particles are drawn to the filter rather than forced through it. That means 99.97%¹ capture down to 0.1 microns – smoke, dust, pollen, pet dander, mould and dust mite allergen – at lower noise and lower power draw than conventional HEPA.

✔ODOURS BROKEN DOWN, NOT MASKED

OdorFence™ uses bio-based enzymes and minerals to break odour and gas molecules apart, removing up to 10x² more odour than a standard carbon layer. Useful for cooking smells, pets, smoke and damp.

✔EFFICIENT BY DESIGN

20 W at full tilt, and a fraction of that on lower speeds – less than a household light bulb, so it is genuinely affordable to leave running.

Smartest display

✔WAKES AS YOU APPROACH

A dot matrix screen with top-facing controls detects motion and lights up as you walk past – wave a hand above it and the panel illuminates. No stooping, no hunting for a button.

✔ANIMATIONS THAT MEAN SOMETHING

Settings are shown through small animations rather than cryptic icons, so the current mode is obvious at a glance.

✔DISPLAY LOCK

Lock the panel to stop settings being changed by curious kids, pets or a stray elbow.

A little maintenance, a lot of comfort

✔ONE FILTER, UP TO 12 MONTHS

A single quick-swap filter, no tools needed. The patent-pending design doubles³ the usable life compared with the previous generation, so you are replacing it roughly once a year.

✔REALTRACK TECHNOLOGY®

Rather than counting down from a fixed date, RealTrack® calculates remaining filter life from actual fan speed, run time and pollution levels. The indicator turns red when it is genuinely time, and the app will tell you too.

✔WASHABLE PRE-FILTER

The fabric pre-filter catches dust, hair and pet dander before it reaches the main filter, extending its life. Vacuum it or rinse it and put it back.

What owners noticed