If you are in a single family dwelling then the medium setting on your water heater is all the IRC requires.
Antiscald is required in multifamily dwellings where the water heaters are heated higher than normal for a single family dwelling, then cold water is mixed into the hot water as it comes out of the commercial style water heaters.
I would not spend the money in a single family dwelling. Normally all that is necessary per the IRC is temp setting on your residential water heater. Medium temp is normally advised setting for safe use.
Hope this helps
Wg
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