Interesting, I ran the math a year and a half ago myself. For my less than 10 year old water heater it was well worth the cost. Was like 3 year break even point

Interesting, I ran the math a year and a half ago myself. For my less than 10 year old water heater it was well worth the cost. Was like 3 year break even point. I did the install myself though, wasn't bad at all.