Age of Byrant Forced Air Furnace

Specific Inspection Topics Inspecting HVAC Systems
1

Can anyone tell me the ages of these Byrant Forced Furance’s.

  1. serial # 23A452115 series SM-C

  2. serial# 36Y348377 series SM-G

  3. serial#23A32282

Thanks!!

2

  1. 23A = 23rd week of 1972

  2. 36Y = 36th week of 1971

  3. 23A = 23rd week of 1972

3

Thanks!