From: On Demand

The Series Four large-capacity electric tankless water heater is rated at 99% efficient. The whole-house unit features microprocessing temperature control. The flow activates each of the EX380T2T2’s heating elements in stages based on hot water demand. Thermostatic control delivers unlimited hot water at precise outlet temperature. Energy factor: 0.99. 800.543.6163. www.eemax.com