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Rheem 685335 - RTEX-18 Professional Classic Tankless Electric Water Heater, 18 kW, 240 Volts

Item: RTEX-18
MFR: 685335
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Professional Classic® tankless electric water heaters offer continuous hot water quick and on demand for single point-of-use or multiple applications

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*
  • 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)
  • 5-Year heating chamber and 1-year parts limited warranty. See Residential Warranty Certificate for complete information
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


NameRheem 685335 - RTEX-18 Professional Classic Tankless Electric Water Heater, 18 kW, 240 Volts
Gemaire Item NumberRTEX-18
Manufacturer Product Number685335
SKU - PIM Number1490603613459
ERP Number369909
Unit of MeasureEA
Weight14.8 Pounds (Lb)
Length19.8 Inches (In)
Width16.8 Inches (In)
Height6.8 Inches (In)
Country of OriginCHN
Voltage240 VAC
Cycle/Hertz60 Hz
CertificationsETL Listed to UL 499 and CSA
CompositionBrass, Copper
Connection Size3/4
Connection TypeThreaded
Fuel TypeElectric
Maximum Pressure (PSI)150
Maximum Temperature140°F (60°C)
Number of Elements1
TypeTankless - Electric
Warranty OfferedYes
Wire Gauge8 AWG
Energy Star RatedNo
UL ListedYes
Product FamilyRTEX
GEM - Case Quantity


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