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How do I determine the age of an Intertek ETL heat pump or air conditioner from the serial number?
Saturday, March 5, 2022
Although the Intertek logo appears prominently on the data sticker of many Japanese, Korean, and Chinese HVAC units, it is not a manufacturer. Intertek is a testing lab, similar to Underwriters Laboratories (UL), and the ETL stands for Electrical Testing Laboratories. Their logo indicates the unit has received the required safety approval and listing by an NRTL (Nationally Recognized Testing Lab). Not all manufacturers put a logo medallion on the cabinet of their products or show their brand name prominently on the data sticker. You may have to look closely for the manufacturer name in small type, usually at the bottom of the sticker.
Go to our article How do I determine the age of my air conditioner? for how to decode the serial number after you have located the manufacturer name. Also see How can I find out the size of my air conditioner?
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To learn more about heating and air conditioning systems, see these other blog posts:
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