I had a few cheat sheets for finding the age of Heat Pumps until my laptop crashed about 6 months ago and I wasn’t able to retrieve them. Not even sure if this particular model was even in my information. Anyhow, I’m trying to determine the Age and Size of the Heat Pump with the information below:
Armstrong, Model No. 2SHP13LE136P-1, Serial No. 1606K18878
Any help would be certainly appreciated.