My title Domestic Hot Water Operation Frequently asked questions and answers Will there be a feature that will allow us to set a maximum DHW production time? (in minutes)A: Yes. During a call for domestic hot water will the display show the temperature of the domestic hot water?A: Yes, the DHW set temperature is displayed. Will the Combi models allow DHW recirculation with a buffer tank and pump?A: The HMU controller has 2 designated pump output that can be configured as DHW supply and DHW re-circulation pump. Return to homepage For answers to additional questions, pleaseĀ contact us directly here.