Specification Sheet

Performance Features
• On demand, consistent and continuous
hot water
• Compact and stylish with digital
temperature control in increments of 1°
ranging from 80°F to 140°F*
• 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°*
Average GPM Usage by
Application
Average Gallons Per Minute (GPM) based on 2010
Plumbing Standards
PRINTED IN U.S.A. 12/20 WP FORM NO. TKE-101 Rev. 6
INTEGRATED HOME COMFOR
T
INTEGRATED HOME COMFORT
Professional Classic
®
tankless electric water
heaters offer continuous hot water
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 – Side 1/2"
compression water connections
with 1/2" NPT adapters included
Unique Features:
•
External Digital Display – shows
outlet temperature
• Durable Copper Immersion
single heating element, field
serviceable
• Simple Installation – 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
SINGLE POINT-OF-USE
RTEX-04 48° 24° 16° 12° – – – – –
RTEX-06 75° 37° 25° 19° – – – – –
MULTIPLE APPLICATIONS
RTEX-08 + 55° 36° 27° 22° 18° 14° – –
RTEX-11 + 75° 50° 38° 30° 25° 19° – –
RTEX-13 + 89° 59° 44° 36° 30° 22° – –
RTEX-18 + + 82° 62° 49° 41° 31° 25° –
RTEX-24 + + 109° 82° 66° 55° 41° 33° 27°
RTEX-27 + + + 92° 74° 62° 46° 37° 31°
RTEX-36 + + + + 98° 82° 62° 49° 41°
+ 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.
Standard Hand Sink 0.5 GPM
Washing Machine 1 to 1.5 GPM
Water-Saver Shower Head 1.5 GPM
Dishwasher 1 to 2 GPM
Kitchen Sink 1 to 2 GPM
Standard Shower Head 2.0 GPM
Bath Tub ≥ 4 GPM
Whole-Home Up to 6 GPM
Warranty
• 5-Year heating chamber and 1-year parts limited warranty
See Residential Warranty Certificate for complete information
RTEX-08, RTEX-11,
RTEX-13
RTEX-18
RTEX-24, RTEX-27
RTEX-36
RTEX-04, RTEX-06
POINT-OF-USE
For 0.5 GPM to 2.0 GPM Applications
MULTIPLE APPLICATIONS
For 0.5 GPM to 6.0 GPM Applications