Data-only rankings

Each list states its criteria and uses only ENERGY STAR certification data and EIA electricity rates. None is a hands-on test. We do not rank by noise, filter price or durability because ENERGY STAR does not publish them.

• Zero-ozone air purifiers for bedrooms
• Air purifiers for large rooms (1,000+ sq ft)
• Smart (Wi-Fi/app) air purifiers ranked by efficiency
• Air purifiers with an air-quality sensor (auto mode)
• ENERGY STAR Most Efficient air purifiers
• Air purifiers newly certified by ENERGY STAR in 2026
• Air purifiers with identical results under different brand names
• Air purifiers by filter type in the ENERGY STAR record

Lowest running cost by room size

Each room-size page lists every qualifying model, cheapest to run first: 100 sq ft · 150 sq ft · 200 sq ft · 250 sq ft · 300 sq ft · 400 sq ft · 500 sq ft · 600 sq ft · 800 sq ft · 1000 sq ft.

Highest CADR per watt overall: most energy-efficient air purifiers.