It's funny because you'd think that'd be the case, but in practice the difference is night and day. Thermostatic mixers will often have a temperature dial on th

It's funny because you'd think that'd be the case, but in practice the difference is night and day. Thermostatic mixers will often have a temperature dial on the output, and it'll be within ~2 degrees of that temperature as soon as the hot water available exceeds that temperature.