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Frequently Asked Questions
Which is quietest for bedrooms?
AirDoctor on low is ~28 dB (whisper-quiet). IQAir on low is ~44 dB. Austin Air on low is ~50 dB. For bedroom use, AirDoctor wins on noise.
Which has the cheapest filter replacements?
AirDoctor filters cost ~$60-120 per change. IQAir pre-filter + HEPA runs $150-200. Austin Air filters are $200-250 but last up to 5 years (vs 6-12 months for others).
Is AirDoctor really medical-grade?
AirDoctor uses UltraHEPA filtration rated to 0.003 microns — 100x smaller than standard HEPA's 0.3 micron threshold. While not FDA-cleared as a medical device, the filtration specs exceed most hospital units.