Overview
- Tests and buyer guides published on Tuesday show models with true HEPA H13 or H14 plus an activated carbon stage remove the vast majority of airborne particles and reduce pollen, smoke and urban fine dust in single rooms.
- Sizing matters: reviewers say Clean Air Delivery Rate (CADR) must match room volume and recommend values around or above 200 m³/h for meaningful results, with higher targets for allergy sufferers or large open spaces.
- Experts and the German Environment Agency stress that purifiers treat airborne particles as a symptom and do not replace window ventilation for fresh air, CO₂ control or moisture management.
- Safety and cost warnings are clear: avoid ozone-generating devices, use only fully enclosed UV‑C systems if present, and plan for recurring filter replacements every 6–12 months plus modest electricity costs at typical draws of 20–60 W.
- Recent 2026 comparisons name category winners for different uses — large-room leaders, quiet bedroom units and price‑performance picks — and reviewers advise buying by need rather than brand to balance noise, running cost and CADR.