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McGarry and Madsen's home inspection blog for buyers of
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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:
• How can I find out the SEER of my air conditioner?
• My air conditioner won't turn on. What's wrong?
• How can I tell whether the condenser (outdoor unit) is an air conditioner or heat pump?
• Does an old air conditioner use more electricity as it ages?
• How did homes stay cool in Florida before air conditioning?
• What is wrong with an air conditioner when the air flow out of the vents is low?
• Why has the thermostat screen gone blank?
• Why does it take so long to cool a house when an air conditioner has been off for a while?
• Why is my air conditioner not cooling enough?
• What are the most common problems with wall/window air conditioners?
• Will closing doors reduce my heating and cooling costs?
Visit our HEATING AND AIR CONDITIONING page for other related blog posts on this subject, or go to the INDEX for a complete listing of all our articles.
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