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How do I determine the age of a Tempra tankless water heater from the serial number?
Sunday, February 7, 2021
Tempra tankless water heaters are manufactured by Stiebel Eltron and follow the same serial number format for determining their age as the company's tank-type water heaters. Look at the middle cluster of four digits in the serial number. Add 25 to the first two digits for the year of manufacture, and subtract 25 from the second two digits for the week. So the heat pump water heater with the serial number shown below was manufactured in the 28th week of 2019. Go to our blog post How can I determine the age of a Stiebel Eltron water heater from the serial number?
To determine the age of another manufacturer/brand of water heater, go to How do I determine the age of my water heater? Also, see our blog posts How can I determine the age of a water heater if the serial number is missing or decoding it is impossible? and What are the most common installation mistakes with water heater replacement? and Are water heaters required to be raised off the floor? and What's that powdery crust on the pipe connections at the water heater?
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