
AirDoctor AD3500
Coverage: 1274 sq ft (118 m²)
High-capacity 4-stage purifier with UltraHEPA filtration claiming capture down to 0.003 µm. Large coverage area suits open-plan living.
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CADR, noise, filter cost — measured the same way.
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Top-performing models across key metrics.

Coverage: 1274 sq ft (118 m²)
High-capacity 4-stage purifier with UltraHEPA filtration claiming capture down to 0.003 µm. Large coverage area suits open-plan living.

Coverage: 610 sq ft (57 m²)
Mid-size 4-stage purifier with UltraHEPA and carbon filtration. Simple controls with auto and sleep modes.

Coverage: 240 sq ft (22 m²)
Compact smart-enabled purifier with solid CADR for small to medium rooms. Wi-Fi control and quiet sleep mode.
Select any models and view every specification in a single, structured comparison.
Structured guides to make informed decisions.
Understanding the mechanics behind high-efficiency particulate air filtration and what H13 vs H14 really means.
Read guideClean Air Delivery Rate decoded: how it's measured, what the numbers mean, and why it matters for your room size.
Read guideWhich filter types, CADR ranges, and features to prioritize if allergies are your main concern.
Read guidePM2.5, VOCs, AQI — a concise reference for the numbers that define indoor air quality.
Read guidePractical questions from people making real purchasing decisions.
I just furnished my apartment with new furniture and the chemical smell is strong. I know VOCs are gases, not particles. Does a HEPA filter help at all, or do I specifically need activated carbon? How long does furniture off-gassing typically last?
My roommate smokes on the balcony but the smoke drifts into the common area (about 35 m²). I need a purifier that handles secondhand smoke effectively. Prioritizing smoke CADR and carbon capacity. Budget up to €300.
Every time I install a new HEPA filter, there's a chemical-like smell for the first day or two. Is this normal off-gassing? Should I run the purifier on high to clear it, or is the smell itself a concern?
Every product evaluation is based on structured specifications, industry standards, and transparent criteria. We document CADR ratings, noise measurements, filter specifications, energy consumption, and long-term maintenance costs. We do not accept payment for placement or rankings.
Information is for educational purposes, not medical advice.