Air Purifiers Under $100: What Reviewers Say About Noise, Filters, and Room Size

What buyers like

• Noticeable reduction in odors and dust in small rooms.
• Low-noise sleep modes for bedrooms.
• Simple controls and filter-change indicators.

Common complaints

• Filter replacement costs that add up over time.
• Overstated room-size claims for larger spaces.
• Noticeable fan noise on higher speeds.

Simple checklist

• Match coverage to your room size, not your whole home.
• Check filter prices and how often replacements are needed.
• If it’s for sleep, prioritize quiet modes under 30–35 dB.