I'm impressed! These filters were only installed five days ago and I already feel a huge difference in my home. Even my dog, who suffers from allergies, has improved and has had no medicine for several days. I'm a sceptic by nature, but you have made a believer out of me. Oh, and by the way, the service was courteous and promptly responsive when I needed to contact them. Highly recommend the company and the filters.
Installed on August 1st 2018 should last for 90 days but I will check it monthly. Great looking product. Over the next month and for 90 days I will be checking its performance.