Mitsubishi slim age

anyone know how to decode the age of one of these stand alone wall units from mitsubishi?
serial is 0001854 T

Check out building I hope that helps

I did its not there.

Yipper call the company I think its in China:shock::stuck_out_tongue:
I don’t know of any other.

Last digit (before letter) is the year… 2004
I think the three digits preceding the last are the Julian day of the year