Marey ECO270 220V Self-Modulating 27 kW, 6.5 GPM Multiple Points Tankless Electric Water Heater for the Whole US Territory, Small, Silver The 220V eco 27 kW requires (3) 50 amp breakers and must be installed by a professional plumber or electrician to ensure safety and quality German-designed with high quality stainless steel water channel and heating chamber Smart technology: easy management and simple adjustments on a LCD panel allows you to program the exact desired water temperature thereby optimizing electricity consumption Recommended for 3 simultaneous Showers (1.5GPM each) in hot climates (US Southern regions). in colder regions, this unit is suitable for a shower at 2. GPM and a sink at 1.0GPM Tankless water heaters save energy because they use up to 60% less energy than conventional tank water heaters. As a result, they are cost effective and environmentally friendly