How we test air purifiers
Our reviews are built on real-world measurements, not marketing claims. Here's exactly how we score, and how we stay independent.
Our scoring criteria
Particle-removal performance from published, independent test data (e.g. Intertek), weighted for the PM2.5 and allergen sizes that matter indoors.
Measured at the speed you'd actually run it, not the marketing "quiet mode". Anything above 35 dB loses points because that's when people turn it down.
Annual cost to run continuously at UK electricity prices. A purifier only works while on, so cost-to-run is a filtration issue in disguise.
Filter cost and availability, warranty, UK/EU shipping and returns — the things that decide whether you keep using it a year later.
Editorial independence
We're reader-supported: when you buy through our links we may earn a commission. That never changes our rankings or scores — the criteria above are applied identically to every product, including ones we earn nothing from. We do not accept payment for placement, and we show competing products by category rather than trading on brand names.
Spotted something we've got wrong, or a purifier we should test? We update reviews as new data and models appear. Our top-pick range is independently tested by Intertek and holds Energy Star Most Efficient 2026.
Explore our guides
Tested advice for the exact problem you're solving.
An honest, evidence-based explainer on what a purifier can and can't do.
By needThe hub for pollen, dust mites, pet dander and mould spores.
By needCut airborne pollen indoors through the UK hay-fever season.
By needReduce airborne particle triggers — with the medical caveats made clear.
By needTackle cat and dog dander, hair and odours in a busy home.
By needWhy smoke needs activated carbon, not just a particle filter.
Meet Veya — your clean-air companion
Every CleanAirKits purifier comes with Veya, a free app that turns it into a smart, self-managing clean-air system for your home.
- ✓Live air quality for every room
- ✓3-day air-quality forecast
- ✓Auto-protect — switches your purifier on before the air turns
- ✓Filter-change reminders
See our current top pick
The purifier that scored highest across filtration, noise and running cost.
See the range →