The Rheem RETE-18 tankless Electric Water Heater features a rugged brass and copper heater exchanger that is designed to withstand tough water conditions for long life. Its lightweight and compact design enables simple installation in a variety of locations. It is designed to provide hot water for up to two bathrooms in warmer climates or a single bathroom in colder climates. Please click the "More Info" Tab and then "Specifications" to view the Rheem Brochure Guide to assist you in your purchasing decision.
California residents: see Proposition 65 information
- Provides a maximum of 3.51 GPM continuous flow at a 35 Degree F temperature rise
- Designed to provide hot water for up to two bathrooms in warmer climates or a single bathroom in colder climates
- Flow rate provided by a tankless electric water heater is dependent on the difference in temperature of the incoming cold water supply and the desired hot water delivery temperature
- 18kW water heater requires a 240-Volt electrical service, 2 separate 40 Amp breaker(s) and 8-Gauge copper wiring
- Energy efficient, uses hot water only when needed
- On-unit temperature controls and LED lights indicate active elements and system operation
- Modulating control adjusts power consumption to meet the required hot water temperature and flow rate
- Rugged brass and copper heat exchanger is designed to withstand tough water conditions for long life
- Lightweight and compact design saves space and enables simple installation in a variety of locations
- Requires 240-Volt electrical connection
- Equipped with 1/2 in. water connections for easy installation
- Modulating Control adjusts power consumption to meet the required hot water / temperature flow rate
How to Choose Your Rheem EcoSense Tankless Electric
Choose your application, ie. shower, bath tub or vanity sink-faucet, kitchen sink faucet or washer. See chart below.
For example: you choose a kitchen sink faucet.
See application chart below and locate your flow rate. For example: your flow rate is 1.5 gpm.
On the map, locate the average water temperature in your area.
For example: your water temperature (in Atlanta) is 55°
Use the water temperature and flow rate chart to determine the model you need.
For example: 1.5 gpm flow rate + 55° = RETE 9.
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