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Rheem Prestige™ High Efficiency Condensing Tankless Gas Water Heater
Rheem Prestige™ High Efficiency Condensing Tankless Gas Water Heater

    Rheem Prestige™ High Efficiency Condensing Tankless Gas Water Heater

    Rheem Prestige™ RTGH is a series of high efficiency condensing tankless gas water heaters designed for continuous hot water


    • 94% energy efficient with stainless steel condensing heat exchanger
    • Intelligent electronic controls designed to increase energy efficiency and safety
    • Third party efficiency listed by AHRI

    • Industry First! 0.26 GPM minimum flow rate, 0.40 GPM minimum activation flow rate
    • RTGH-95 for 3 bathroom homes*– 9.5 gal./min. at 35°F rise max., 8.4 gal./min. at 45°F rise SCAQMD rule 1146.2 compliant
    • RTGH-84 for 2-3 bathroom homes*– 8.4 gal./min. at 35°F rise max., 6.6 gal./min. at 45°F rise SCAQMD rule 1146.2 compliant

    Compact Size
    • Compact space saving design – about the size of a medicine cabinet

    Self-Diagnostic System
    • Self-diagnostic system for easy installation and service
    • Digital display shows temperature setting and maintenance codes

    • Two-pipe direct vent system designed for PVC pipe, see instructions for details
    • Hot start programming helps minimize fluctuation in water temperature, referred to as “cold water sandwich,” during periods of frequent on/off operation
    • Built-in electric blower
    • Exclusive! Guardian overheat film wrap (OFW)
    • EZ-Link cable available for higher demand applications to connect two tankless units to operate as one
    • Manifold up to six units with an optional MIC-6 manifold control board
    • Manifold up to 20 units with the optional MIC-185 plus the MICS-180 manifold control assembly

    High Altitude Compliant
    • High-altitude capability – up to 9,840 ft. elevation above sea level

    • Up to 38 ft. of 3” PVC Pipe or 5 ft. of 2” PVC Pipe, see instructions for details
    • Digital remote control and 10 ft. of thermostat wire included
    • Supplied with a 120 volt power cord (indoor models only)
    • Freeze protection to -30°F
    • EZ- Spec™ Sizing Software – advanced online tool that takes the guess work out of sizing tankless applications
    Technical specification
    • Unique ref.water_heater-tankless-rheem-rtgh
    • Product familyTankless
    • Product groupResidential Gas
    • TypeObject (single object)
    • Date of publishing2012-12-04
    • Edition number1
    • Material mainMetal
    • Designed inUnited States
    • Manufactured inUnited States
    • BIMobject CategoryHVAC - Water heaters
    • IFC classificationBoiler
    • ETIM CodeEC000392
    • ETIM NameInstantaneous water heater
    • Uniclass 2015 CodePr_60_60_96
    • Uniclass 2015 DescriptionWater heaters
    • CSI MasterFormat 2014 Code22 34 13
    • CSI MasterFormat 2014 TitleInstantaneous, Tankless, Gas Domestic Water Heaters
    • OmniClass Number23-31 29 11 13
    • OmniClass TitleGas Instantaneous Hot Water Heaters
    • CSI UniFormat II CodeD2090
    • CSI UniFormat II TitleOther Plumbing Systems

    Region availability

    North America
    United States