Rheem PERFORMANCE Tankless Electric Water Heaters

PERFORMANCE® Tankless Electric Water Heaters

Offer Continuous Hot Water

Performance Features

  • On demand, consistent and continuous hot water
  • Compact and stylish with digital temperature control in increments of 1°F ranging from 80°F to 140°F*
  • Robust copper immersion heating elements with brass top increase durability and are threaded for easy replacement
  • Simple Installation
  • Digital temperature display
  • External controls to adjust temperature in increments of 1°F*

Average GPM Usage by Application

Average Gallons Per Minute (GPM) based on 2010 Plumbing Standards
Application GPM
Standard Hand Sink0.5 GPM
Washing Machine1 to 1.5 GPM
Water-Saver Shower Head1.5 GPM
Dishwasher1 to 2 GPM
Kitchen Sink1 to 2 GPM
Standard Shower Head2.0 GPM
Bath Tub≥ 4 GPM
Whole-HomeUp to 6 GPM

Warranty

5-Year heating chamber and 1-year parts limited warranty. See written warranty for complete details.

*RETEX-04 and RETEX-06 only show output temperature and are non-thermostatically controlled.

Model Categories

POINT-OF-USE

For 0.5 GPM to 2.0 GPM Applications

Models: RETEX-04, RETEX-06

MULTIPLE APPLICATIONS

For 0.5 GPM to 6.0 GPM Applications

Models: RETEX-08, RETEX-11, RETEX-13, RETEX-18, RETEX-24, RETEX-27, RETEX-36

Temperature Rise Table

Temperature Rise (°F)
MODEL NUMBER 0.5 GPM1.0 GPM1.5 GPM2.0 GPM2.5 GPM3.0 GPM4.0 GPM5.0 GPM6.0 GPM
SINGLE POINT-OF-USE
RETEX-0448°24°16°12°-----
RETEX-0675°37°25°19°-----
MULTIPLE APPLICATIONS
RETEX-08+55°36°27°22°18°14°--
RETEX-11+75°50°38°30°25°19°--
RETEX-13+89°59°44°36°30°22°--
RETEX-18++82°62°49°41°31°25°-
RETEX-24++109°82°66°55°41°33°27°
RETEX-27+++92°74°62°46°37°31°
RETEX-36++++98°82°62°49°41°

+ Temperature electronically limited setting on adjustable thermostat on front cover.

Certifications

Tested and certified by the Water Quality Association against NSF/ANSI 372 for lead-free compliance.

ETL Listed to UL 499 and CSA C22.2 No.64.

Model Specific Features

RETEX-04, RETEX-06

  • External Digital Display - shows outlet temperature
  • Durable Copper Immersion single heating element, field serviceable
  • Simple Installation - Bottom 1/2" NPT water connections

RETEX-08, RETEX-11, RETEX-13

  • External Adjustable Digital Thermostatic Control with LED display (+/- 1 degree accuracy)
  • Durable Copper Immersion two heating elements, field serviceable
  • Simple Installation – Side 1/2" compression water connections with 1/2" NPT adapters included

RETEX-18

  • External Digital Thermostatic Control with LED display (+/- 1 degree accuracy)
  • Most advanced self-modulation, adjust power to meet hot water demand
  • Durable Copper Immersion two heating elements, field serviceable
  • Simple Installation – Bottom 3/4" NPT water connections

RETEX-24, RETEX-27

  • External Digital Thermostatic Control with LED display (+/- 1 degree accuracy)
  • Most advanced self-modulation, adjust power to meet hot water demand
  • Durable Copper Immersion three heating elements, field serviceable
  • Simple Installation - Bottom 3/4" NPT water connections

RETEX-36

  • External Digital Thermostatic Control with LED display (+/- 1 degree accuracy)
  • Most advanced self-modulation, adjust power to meet hot water demand
  • Durable Copper Immersion four heating elements, field serviceable
  • Simple Installation - Bottom 3/4" NPT water connections

Tankless Electric Specifications

Specifications
DESCRIPTION MODEL NUMBER kW AMPS RECOMMENDED BREAKER SIZE VOLTAGE RECOMMENDED WIRE SIZE (CU) MIN. FLOW (GPM) MAX. FLOW (GPM) HEIGHT (INCHES) WIDTH (INCHES) DEPTH (INCHES) WATER CONN. SHIP WEIGHT (LBS.)
120V 1 HEATING CHAMBERRETEX-043.529A(1x30)A12010 AWG0.34.85-7/810-7/82-3/41/2 NPT4.5
240V* 1 HEATING CHAMBERRETEX-066.029A(1x30)A22010 AWG0.34.85-7/810-7/82-3/41/2 NPT4.5
RETEX-087.333A(1x40)A2408 AWG0.34.812-5/88-1/43-5/81/2 CF7
RETEX-1111.846A(1x50)A2406 AWG0.34.812-5/88-1/43-5/81/2 CF8.5
RETEX-1313.054A(1x60)A2406 AWG0.34.812-5/88-1/43-5/81/2 CF8.5
240V* 2 HEATING CHAMBERSRETEX-1818.075A(2x40)A2408 AWG0.37.018-1/414-1/23-1/23/4 NPT14.78
240V* 3 HEATING CHAMBERSRETEX-2424.0100A(3x40)A2408 AWG0.37.018-1/417-5/83-1/23/4 NPT17.8
RETEX-2727.0113A(3x40)A2408 AWG0.37.018-1/417-5/83-1/23/4 NPT17.8
240V* 4 HEATING CHAMBERSRETEX-3636.0150A(4x40)A2408 AWG0.38.018-1/421-5/83-1/23/4 NPT22.7

* 240V units can be used on 208V single phase with 25% reduced temperature output. Please note per UL standards the rating plate and installation instructions will all be according to a 240V applied voltage. Check with local officials prior to derating the electrical infrastructure.

Product Specifications (All Models)

Product Specifications (all models)
Specification Value
Rated Pressure25 PSI min., 150 PSI max.
CertificationsETL Listed to UL 499 and CSA
Std. Temp. Settings120°F (Adjustable 80°F-140°F)
Temp. Accuracy+/-1° at steady state flow
Turn-On0.3 GPM

Suggested Specifications

Unit shall have copper clad immersion heating element(s) with brass terminations for increased durability. External temperature control and display adjustable in 1° increments with a range of 80°-140°F. Display shall be capable of displaying setpoint temperature in Celsius or Fahrenheit temperature scales. Unit shall utilize a flow meter with a 0.3 gpm activation point and manage power based on actual flow rate and inlet temperature. Values should be processed 60 times per second. Unit shall be WQA certified lead free, certified to UL499 and CSA C22.2 No.64.

Optional Inline Flow Regulator

  • Enhanced outlet temperature control
  • Install on the outlet side of the heater
  • Limit maximum volume to the specified flow rate to ensure exiting temperature is within an acceptable range
  • Flow Regulators for 1/2" and 3/4" NPT plumbing connections
  • Flow range: 1 to 5 gallons per minute

Suggested Sizing Guide

Suggested Sizing Guide
MODEL NUMBER FLOW REGULATOR PART NO. GPM INSERT TO USE BASED ON INLET WATER TEMPERATURE
40°F 50°F 60°F 70°F
RETEX-04N/AN/AN/AN/AN/A
RETEX-06N/AN/AN/AN/AN/A
RETEX-08RTE10001A1.01.01.01.5
RETEX-11RTE10001A1.01.01.52.0
RETEX-13RTE10001A1.01.01.52.0
RETEX-18RTE10001B2.02.02.03.0
RETEX-24RTE10001B2.02.03.04.0
RETEX-27RTE10001B2.03.04.05.0
RETEX-36RTE10001B3.04.05.05.0

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