Specification Sheet

Performance Features
• On demand, consistent and endless
hot water
• Compact and stylish with digital
temperature control in increments of
1°F ranging from 80°F to 140°F*
• 99.8% Energy efficient
• Robust copper immersion heating
elements with brass top increases
durability and are threaded for easy
replacement
• Simple Installation
• Digital temperature display
• External controls to adjust temperature
in increments of 1°F*
Applications
• Whole-Home – up to 6 GPM
• Water-Saver Shower Head – 1.5 GPM
• Standard Shower Head – 2.0 GPM
• Standard Hand Sink – 0.5 GPM
• Kitchen Sink – 1 to 2 GPM
• Bath Tub – ≥ 4 GPM
• Dishwasher – 1 to 2 GPM
• Washing Machine – 1 to 1.5 GPM
Average Gallons Per Minute (GPM) based on 2010
Plumbing Standards
Warranty
• 5-Year heating chamber and 1-year
parts limited warranty
See Residential Warranty Certificate for complete
information
PRINTED IN U.S.A. 01/17 WP FORM NO. TKE-101
INTEGRATED HOME COMFOR
T
INTEGRATED HOME COMFORT
Professional Classic
®
tankless electric water heaters
offer continuous hot water quick and on demand for
single point-of-use or multiple applications
See specifications chart on back.
RTEX-08
RTEX-11
RTEX-13
RTEX-18
RTEX-24
RTEX-27
RTEX-36
RTEX-04
RTEX-06
Water
INTEGRATED HOME COMFORT
Residential Electric
Professional Classic
Tankless Water Heaters
RTEX-08, RTEX-11, RTEX-13RTEX-04, RTEX-06
Unique Features:
• External Adjustable Digital
Thermostatic Control with LED
display (+/- 1 degree accuracy)
• Durable Copper Immersion two
heating elements, field serviceable
• Simple Installation – 3 Foot
electric cable and 1/2 NPT
adapters included; Side 1/2"
compression water connections
Unique Features:
•
External Digital Display – shows
outlet temperature
• Durable Copper Immersion
single heating element, field
serviceable
• Simple Installation – 3 Foot
electric cable included; Bottom
1/2" NPT water connections
RTEX-18
Unique Features:
• 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
RTEX-24, RTEX-27
Unique Features:
• 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
Unique Features:
• 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
RTEX-36
MODEL NUMBER
TEMPERATURE RISE °F
0.5
GPM
1.0
GPM
1.5
GPM
2.0
GPM
2.5
GPM
3.0
GPM
4.0
GPM
5.0
GPM
6.0
GPM
RTEX-04 48° – – – – – – – –
RTEX-06 75° 37° – – – – – – –
RTEX-08 – 55° 36° 27° 22° 18° – – –
RTEX-08 (derated 208V performance) 79° 40° 27° 20° – – – – –
RTEX-11 – 75° 50° 38° 30° 25° – – –
RTEX-11 (derated 208V performance) – 56° 37° 28° – – – – –
RTEX-13 – 89° 59° 44° 36° 30° 22° – –
RTEX-13 (derated 208V performance) – 69° 46° 34° – – – – –
RTEX-18 – + 82° 62° 49° 41° 31° 25° –
RTEX-18 (derated 208V performance) – 90° 60° 45° 36° 30° – – –
RTEX-24 – + + 82° 66° 55° 41° 33° 27°
RTEX-24 (derated 208V performance) – + + 60° 48° 40° 30° 24° 20°
RTEX-27 – + + 92° 74° 62° 46° 37° 31°
RTEX-27 (derated 208V performance) – + + 68° 55° 45° 34° 27° 23°
RTEX-36 – + + + 98° 82° 62° 49° 41°
RTEX-36 (derated 208V performance) – + + 91 73° 61° 45° 36° 30°
+ Temperature electronically limited setting on adjustable thermostat on front cover
*RTEX-04 and RTEX-06 only show output temperature and are non-thermostatically controlled
Rheem.com
Tested and certified by the
Water Quality Association
against NSF/ANSI 372 for
lead free compliance.