The AHS18-D electric tankless water heater delivers reliable on-demand hot water in a compact, space-saving design. Built for residential and light commercial applications, this 18 kW, 240-volt tankless water heater uses advanced iHeat™ Closed Loop Modulation to automatically adjust power usage based on hot water demand, helping improve efficiency while maintaining consistent outlet temperature.
Designed with 3/4-inch NPT water connections, a 0.25 GPM minimum activation flow rate, and a durable stainless steel construction, the AHS18-D is ideal for high-demand point-of-use, multi-fixture, or whole-home applications depending on climate, incoming water temperature, and flow requirements. Its digital controls, integrated flow meter, real-time monitoring, and USB diagnostic capability make it a smart, serviceable upgrade from traditional tank-style water heaters.
With no storage tank to refill, the AHS18-D provides continuous hot water when properly sized and installed. Its compact wall-mounted design helps save space, while the stainless steel heat exchanger and enclosure help resist corrosion and support long-lasting performance. Official Drakken specs list this model as 18 kW / 75A, requiring two 40A breakers, with 3/4-inch NPT connections, 150 PSI max pressure, and dimensions of 16" H x 13.5" W x 3.5" D
