](https://www.bestbuy.com/product/blueair-blue-pure-211i-max-3000-sq-ft-hepasilent-smart-extra-large-room-air-purifier-white-gray/JX95HCYS4Z/sku/6532153) Small Rooms/Bedrooms Medium Rooms Coverage (30m) ~387 sq. ft. Coverage (30m) ~929 sq. ft. Noise Level 19–46 dB Noise Level 23–50 dB Est. Price Est. Price ~$170–$230 Key Advantage Compact & whisper quiet Key Advantage Best overall balance
: Users frequently note these units are "super silent" on low settings, making them ideal for nurseries. Energy Efficiency : Most models are Energy Star certified, with the estimated to cost only about $19/year in electricity. buy blue air purifiers
Reviewers on community forums share mixed experiences regarding the brand's smart features and support. ](https://www