Locate manufacture date on a Mueller Climatrol 119-125-3 2DR furnace

[Rex Vaughn]

I am trying to locate the manufacturing date for a Mueller Climatrol Model# 119-125-3, SN: 2DR 2DR.

Thank you and have a good day

[Jon Ellis]

Rex,

That sounds like an old boiler, but I don't have any source for dating that. For most HVAC systems, I use this site as a reference:
http://www.buildingcenter.org/first-co

Good Luck,
Jon