The EcoSmart 27kW Electric Tankless Water Heater is one of the most powerful models from our full line of tankless water heaters, with the capacity to handle a large single-family home and is perfect for a large Roman-style and Jacuzzi tub or high demand of hot water between multiple applications, even in colder climates. In warm climates, the ECO 27 can run four showers and a sink simultaneously without running out of hot water. Use the EcoSmart interactive sizing guide to find out which model is ideal for you. The most advanced, self-modulating technology available, meaning the ECO 27 will adjust energy usage based on how much hot water is needed. Savings of up to 50% on water heating costs. Digital temperature control in 1-degree increments allows control of hot water. Copper and stainless components designed for efficiency, durability and easy replacement. Compact size saves valuable storage space.