Knight®-Knight XL®-Lochinvar® (Water Heaters)

Brands include:  Aquas – Armor – Cadet – Copper-Fin – Copper-Fin II -Crest – EnergyRite – FTXL – Knight – Knight XL – Lochinvar – Noble – Power-fin – Shield – Squire – SYNC and others.

How to determine the date of production/manufacture or age of Lochinvar® HVAC and Water Heater Systems.

The date of production/manufacture or age of Lochinvar® HVAC equipment can be determined from the serial number located on the data plate.

Parent Company:  Lochinvar

Example serial number styles/formats found:

The Serial Numbers shown are utilized with all Lochinvar Brand systems of Boilers, Water Heaters, Pool Heaters, etc.
  • Style 1:  KJ-1000130
  • Style 2:  1142N012345
  • Style 3:  J-93001
  • Style 4:  A07H00123456
  • Style 5:  J93-1030F
  • Style 6:  M78013
  • Style 7:  5Y013
  • Style 8:  1234569708

Style 1:   KJ-1000130

Year of manufacture can be determined by using the 1st letter digit.
Month of manufacture can be determined by using the 2nd letter digit.

Style 2:   1142N012345

Year of manufacture can be determined by using the 1st & 2nd numerical digits.
Week of manufacture can be determined by using the 3rd & 4th numerical digits.

Style 3:   J-930001

Month of manufacture can be determined by using the 1st letter digit.
Year of manufacture can be determined by using the 3rd & 4th (the 2nd digit is a dash) numerical digits.

Style 4:   A07H00123456

Month of manufacture can be determined by using the 1st letter digit.
Year of manufacture can be determined by using the 2nd & 3rd numerical digits.

Style 5:   J9312030F

Month of manufacture can be determined by using the 1st letter digit.
Year of manufacture can be determined by using the 2nd & 3rd numerical digits.

Style 6:   M78013

Month of manufacture can be determined by using the 1st letter digit.
Year of manufacture can be determined by using the 2nd & 3rd numerical digits.

Style 7:   5Y013

Month of manufacture can be determined by using the 1st numerical digit.
Year of manufacture can be determined by using the 2nd letter digit.

Style 8:   1234569708

The last four digits of the serial number represent the year and month of manufacture.


Page last updated: 7/28/2017