Response from the owner:Thank you for taking the time to share your feedback. Our recommended filter replacement is every 16–24 months, which is within industry standards, and we intentionally keep our replacement filters priced very competitively. Because our maintenance items are already priced low, we’re unable to offer additional discounts on them. This is also part of how we’re able to offer our systems at such a significant discount upfront. When the filter cost is spread over the recommended replacement period, it works out to roughly the cost of four bottles of water per month. We truly believe the value of having clean, great-tasting water available right in your home is well worth it. We appreciate your business and hope you’ll continue to enjoy the benefits of your system for many years to come. We’re always here if you need us!