These have been amazing! I ordered 2 of these and 2 of the other side so we have one in each bedroom and our living room. All of us have been getting sick all winter and allergies were wrecking havok on us also. And also being a childcare provider those kids were constantly passing everything around. It's been al.osteoporosis 2 weeks and all of our allergies are minimal! There is no dust specks flying in the air any more. And our home smells so just clean. I also got 2 Pure Guardian essential oil diffusers and have been putting PLANT therapy kid safe germ destroyer in those. It's been a great combination to keep all the germs away. Finally no more snotty noses and hacking coughs!