I have used these air filters in our home and I am completely sold on their remarkable results. I really am glad that they can take out the germs in the air and make the air in our home purer. I can almost feel and smell the difference when using these filters. Also, it is wonderful not to have to change the filter every month. I appreciate the quality and long lasting ability to keep working and in the long run, they are more economical than others. They are always available at the retair store where we shop.