Source to Determine HVAC Manufacture Date

Specific Inspection Topics Inspecting HVAC Systems
1

Probably been discussed a few time on this board but I thought I should post this website link. It has a guide for determining manufacture date on some common units. I can’t vouch for how accurate the information is.

http://hisearch.web.officelive.com/hvac.aspx

2

Here is one way NOT to do it.

3

That’s awful.