For Condensing Units – When facing the unit, it is on the right hand side underneath the silver data label, it is the second barcodes labeled Serial#xxxxxxxxxxxxxxxxxxxx.
For Air handlers – Serial number is on the face of unit underneath the silver data label, it is the second barcodes labeled Serial#xxxxxxxxxxxxxxxxxxxx.
For Cassettes – It is inside the cassette unit. Remove the filter panel and it is underneath the silver data label, it is the second barcodes labeled Serial#xxxxxxxxxxxxxxxxxxxx.
For Fan Coils – When facing the unit, it is on the right hand side of refrigerant line on the panel and underneath the silver data label, it is the second barcodes labeled Serial#xxxxxxxxxxxxxxxxxxxx.
For Highwall units – when facing the units, can be either on the right hand side of the unit or underneath the unit itself. The serial number is underneath the silver data label, it is the second barcodes labeled Serial#xxxxxxxxxxxxxxxxxxxx.
For Floor Ceiling units – When facing the unit, it is on the right hand side and serial number is underneath the silver data label, it is the second barcodes labeled Serial#xxxxxxxxxxxxxxxxxxxx.