Say hello to the Blueair’s most advanced air purifier ever, HealthProtect™. Every component is uniquely designed in Sweden to silently provide the maximum performance and energy efficiency. With HealthProtect™ you can be reassured knowing your family is breathing safe, clean air. The 7740i is a perfect solution for large rooms with its high clean air flow. It’s recommended for rooms up to 62 m2 (5 air exchanges per hour according to AHAM).