Need help dating Water Furnace Geothermal

Serial Number;

ATV057D110NLT

You date Appliances? Damn I knew Texas is big and can get lonely but this is just crazy! What’s her name?

No manufacturer=hard to do George

Without knowing anything else and just going off the serial number I will take a wild guess of 2005

Name of manufacturer is Waterfurnce.

Just got off of the phone with Waterfurnace. Their date codes are imbedded in the Serial Number with P being 1999. The L denotes the month.