Professional Prestige Series: 84 Outdoor

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

  • Energy-efficient design delivers and estimated lifetime savings of up to $1000 on energy costs*

  • *Based on a comparison of a Rheem Prestige™ Condensing Tankless Water Heater (natural gas) with 0.94 EF and a 40-gallon standard residential natural gas tank-type water heater with a 0.62EF; Savings claim based on difference in annual operating costs from DOE over the 12-year warranty period of the Rheem Tankless unit; Savings higher for LP models.

    • Up to .92 EF 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
    • SCAQMD rule 1146.2 compliant
    • RTGH-95 for 3 bathroom homes*– 9.5 gal./min. at 35°F rise max., 8.4 gal./min. at 45°F rise
    • RTGH-90 for 2-3 bathroom homes*– 9.0 gal./min. at 35°F rise max., 7.5 gal./min. at 45°F rise
    • RTGH-84 for 2-3 bathroom homes*– 8.4 gal./min. at 35°F rise max., 6.6 gal./min. at 45°F rise
    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 (up to 38 ft. of 3" PVC Pipe or 5 ft. of 2" PVC Pipe). See instructions for details
    • Hot-start programming helps minimize fluctuation in water temperature, referred to as “cold water sandwich effect,” during periods of  frequent on/ off operation
    • Built-in electric blower
    • Exclusive! Guardian OFW™ overheat film wrap
    • 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
    • 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
    • Required manual gas isolation valve included
    • EZ- Spec™ Sizing Software – advanced online tool that takes the guess work out of sizing tankless applications – available at

    RTGH-84DVLN .92 EnergyStar
     OUTDOOR RTGH-84XLN .92 EnergyStar

    • ENERGY STAR® rated
    • Up to .92 EF with stainless steel condensing heat exchanger
    • Built-in Condensate Neutralizer – reduces installation cost and time


    Professional Prestige Tankless H84 Outdoor
    Brochure (US and Canada)
    Parts and Accessories Catalog (US)
    Revit Model (RTGH_84DVL-95DVL) (US and Canada)
    Specification Sheet (US and Canada)
    Tax Credit Information
    Use and Care Instructions (US and Canada)
    Warranty Information (US and Canada)


    Parts Warranty: 5 Years
    Labor Warranty: 1 Year
    Heat Exchange Warranty: 12 Years

    KwikComfort® Financing can help make your purchase even easier.
    Rheem makes it easy to find a financing option that works for you! With many options and benefits available, KwikComfort Financing is the best way to get the home comfort you need without the wait.

    • Applications made easyWe'll help you avoid lengthy contracts, headaches and hassles.
    • Kwik credit decisionsYou'll get an answer to your application within minutes.
    • Fast credit for the futureFinance your Rheem equipment and anything you want to add later.
    • Reduced interest/fixed paymentsGet low interest and fixed monthly payments until the purchase is paid.
    • Minimum monthly paymentTake advantage of convenient monthly payments that fit your budget.
    • Deferred interest/no interestEnjoy interest-free payments as long as the balance is paid by the due date.