Lennox age

Hey guys anyone have the ability to tell me the age of these units.

LENNOX M/N: 12HPB30 S/N: 5801M36993
Air Handler:
LENNOX M/N: CB30M-41-1P S/N: 5801A 07829


Sure about that?

Lennox: Either the first two or second two digits are the year, it varies by era, but most of them actually have a separate sticker somewhere that has the year printed on it. Newer ones are first two equals manufacturing plant #, 2nd two are year and letter in fifth slot is month (A thru M minus I). So 5898G 07568 would be Plant # 58, Year of MFR would be 98 and month would be July.

December 2001

January 2001