Level 5 - DSM - Hot Water Service within 'Plant Data'

Hello,

I am trying to model an Indirect Water Cylinder within 'plant data' for a Level 5 EPC.

One of the variables that the software asks for is 'heat losses from unit' with the units being W/degree C.

Within SBEM, the heat loss is stated in MJ/month of by entering the water storage volume and insulation thickness.

Can someone please advise what this W/degree C relates to?

Many thanks

Kevin H