We are working on a project where a significant amount of the domestic hot water ring feed piping will be cast into the concrete walls, and the designer is querying if these pipes will need to be insulated as per ASHRAE 90.1. There do not seem to be any exceptions in the ASHRAE 90.1 for pipes in concrete, but we are just wanting to confirm that. Do pipes cast in concrete have to adhere to the same insulation requirements?
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