As of April 2017 Rheem discontinued the RTE 9 and replaced it with RTEX - 8

The Rheem RTE 9 is an Electric Tankless Water Heater, perfect for point-of-use applications. It can heat a maximum of 3 gallons per minute. When compared to traditional water heaters, it's energy efficient. The Rheem RTE 9 is great for homes, condos, hospitals, boats, offices, laboratories, and anywhere hot water is needed.

Features:

Continuous hot water on demand
Industry leading low-flow activation
External temperature control
LEDs indicate active element and standby mode
1/2-Inch water connections
Rugged brass/copper heat exchanger
Pre-wired 2-foot power supply cord(s) included
RTE 9 requires a dedicated 40 AMP breaker
On-unit temperature control
Modulating power

===

Rheem RTE - 9 Electric Tankless Water Heater, 3 GPM