120-Volt 1.8 kW 0.27 GPM Compact Point-of-Use Tankless Electric Water HeaterAQM tankless water heaters heat water instantaneously and endlessly at 99% efficiency as it flows through the unit. Unlike water heaters with a tank, they save energy because they have no stand by energy losses. AQM tankless point of use models excel at supplying warm water at a constant temperature for hand washing at a sink but must be carefully matched to the flow rate of the sink to operate properly. They are ideal for residential or commercial