Ours will be 3 years old next month and I have yet to flush it. We have a filter system as well as a softener system and don't have a problem with calcium buildup or clogged screens on our fixtures. It takes a while for hot water to get to the bathroom as it's on the other side of the house but it would take just as long if I had a tank heater. One great thing about having the tankless is you gain closet storage space in your garage where there would normally be a tank which is priceless.
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