Beurer LR330 Comfort 2-in-1 Air Purifier White 4.6L Enjoy fresh and pure air with this air purifier, which uses a three-layer filtration system. With an 85% purification performance, enjoy perfectly pure air for spaces up to 35 square meters. This device also has features such as automatic shut-off, night mode, and a timer to give you ease of use while saving energy.