I bought two of these filters for my home. I thought I could replace them with a rotating system. I always have a clean filter when it's time to clean the built in filter. We used our first filter for a month. I could have left him alone longer, but we have four children and a dog. I thought maybe it was time for the first cleaning. It's really easy to clean which is a big plus. I figured that given the initial cost, this product would pay for itself in about two years, but I didn't take into account that we typically leave our filter on for about a month longer than we should. In my estimation, the amortization will take a little over a year. The great advantage of this product is that we always have a clean filter. This increases the lifespan of our stove and reduces the number of allergies. Overall I am very satisfied with this product. It feels very durable and seems to do a very good job of filtering. Highly recommended if you are like me. I'm always looking for ways to save money, and I don't mind some upfront cost if it means saving me money in the long run.
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