The ENERGY STAR® Certified Rinnai® – RU80i is a quality water heater built to provide an unlimited hot water supply for the modern home. Indeed, this compact tankless water heater is equipped with built-in Rinnai Circ-Logic™ with recirculation program cycles pump at pre-set interval while maintaining temperature for optimized comfort with efficiency. Also, this model is designed to operate with 40% less energy as compared with an ordinary tank-type water heater. In fact, having no tank to fill for storage, this unit produces hot water on demand and with high efficiency. Also, this model has an enhanced scale detection as prevention of possible serious long-term damage to the device.

As well as this model is energy and cost efficient, it also has a temperature, lock feature to avoid accidents due to unauthorized changing of pre-set temperature settings. As an added measure the Rinnai Ultra Series Tankless Water Heaters come with a limited warranty covering five years for parts and labor and twelve years for the heat exchanger.