I'm highly sensitive to chemicals. When I discovered that washing clothes and taking showers in the water from our county water supply was making me sick, I knew I had to buy a good whole house water filtration system. After researching different filtration systems, I felt more at ease when I found Pure Effect Filters. I have had this system for more than a year, and it's wonderful. I have a household of three, and recently replaced the filter cartridges after one year. Pure Effect -- Thank you for making such a wonderful water filtration system.