Singer Furnace Age

[mharris6 (Mitch Harris, CMI)]

Can anyone help me with the age of a singer 80,000 nat gas furnace serial # 0210310-E33-0614 model # G-U311080-12NMA

[bhartley (Buck Hartley, CMI)]

Mitch,

1977 - 1978, according to the Preston’s Guide

[mharris6 (Mitch Harris, CMI)]

Many thanks, Buck