I received the room air purifier to evaluate and provide my honest review. After using the air purifier for several weeks I can fully endorse and recommend this air purifier. With the HEPA filter continuously cleaning the air in my family room, and kitchen area, the interior house air is noticeably cleaner and fresher and my family and I have not sustained any colds or breathing issues. The air purifier is very easy to us, has built in timer, and automatically shuts off at the conclusion of its timer setting. It is of very high quality and service.