Age of Lennox furnace

[Lynn W. Gerving]

Need age on a old Lennox Natural Gas furnace. S/n G9-110 M-1 67-4

Nothing I have goes back far enough for this one.

Lynn W. Gerving

[Russel Ray]

I have some inconsistent data on Lennox that would seem to indicate July 1969.

[Lynn W. Gerving]

Thanks Russel. That about what is was guessing but wasn't sure.

Lynn W. Gerving

[gbeaumont]

Hi to all,

Lynn, you and Russel are in the right area, Prestons list it as current for 1967 & 1968. 1100,000 btu input with 57% efficiency.

It is well past its intended life span and very inefficient.

Regards

Gerry

[Russel Ray]

I have some information that indicates that the "67" in the serial number is when the model first hit the market.

However, I have some conflicting information that indicates that the "67" is the ANSI date.

My research and notes continue....