Gas-Fired Boiler Age Assistance Please

Need help with age please…

1935 SF home…

Gas-Fired Boiler
Weil-McLain Co, Inc.
Model# CGM-8 (CGM Series 8)
S/N# 4

I located a pdf of the owners manual online, but no indication of age

Many thanks in advance for your help. :smiley:


The information I have only goes back to a series 5, which was built between 1977 to 1980. this unit is older but I can’t help with an exact date.

Thanks Michael. I appreciate what info you have.