Lennox Heat pump age

Model E12Q3-20-3P I was unable to find a serial number on the inside unit. The outside unit tag is not legible. Any ideas?
P4260109 P4260013

The style looks like “budget for replacement”.


Did you see an ansi date code? It can give you an era.

20 plus years IMO

Lennox started making that unit in 1979. No idea of actual age.

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Thanks, I very seldom see Heat pumps around here.

I recognize that style of unit, it’s 30 years old +/-

On occasion, the serial number is on the bottom of the data plate. Have snapped a few pics myself and the realized I didn’t have the serial number too. Always try to get the whole data plate.

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