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Rheem RTGH-90DVLN-2 HE Indoor Direct Vent Natural Gas Tankless Water Heater

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Rheem RTGH-90DVLN-2 HE Indoor Direct Vent Natural Gas Tankless Water Heater

Rheem RTGH-90DVLN-2 HE Indoor Direct Vent Natural Gas Tankless Water Heater


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


  • Up to .93 UEF - US
  • Up to .96 EF - Canada
  • With stainless steel condensing heat exchanger


  • Exclusive! Water Savings Setting – upon activation, this setting can save homeowners up to 1,100 gallons of water per year by decreasing the flow of water through the pipes until the temperature reaches the heater’s set temperature
  • Industry Leading Low Flow Activation - Minimum flow rate of .26 GPM and minimum activation flow rate of .40 GPM ensures the user will receive hot water even in low demand situations
  • Recirculation Pump Kit-Ready – Providing faster hot water at the tap and savings of up to 12,000 gallons water/year
  • Exclusive! Hot Start Programming - Minimizes cold water bursts by staying in ready-fire state for back-to-back hot water needs 

Easy Installation and Service

  • NEW! 2" Venting with band connections
  • NEW! Vent up to 150 ft with 3" PVC and 60ft with 2" PVC 
  • Built-in condensate neutralizer
  • 1/2" Gas line compatibility up to 24 ft.
  • Exclusive! Maintenance Notice Setting - Alerts homeowner, after 500 hours of use, to call for service check (optional)
  • Self-diagnostic system for easy installation and service
  • Digital remote control now pre-wired and 10 ft. of thermostat wire included 
  • Supplied with a 120-volt power cord (indoor models only)
  • High-altitude capability – up to 8,400 ft. elevation above sea level  



  • EcoNet Enabled - all Tankless products from 2010 to present can connect to EcoNet mobile app via Tankless EcoNet Accessory Kit (REWRA630TWH) 
  • For higher demand application, easily link multiple tankless units to operate as one system:
  • 2 Units: EZ Link Cable
  • Up to 6 units: MIC-6 Control Board
  • Up to 20 units: MIC-185 plus MICS-180 manifold control assembly

Environmentally Friendly Low Emissions 

  • Ultra Low NOx burner meets SCAQMD rule 1146.2 requirements Safety
More Information
Weight 87.000000
Manufacturer Rheem
UPC 020352695297
GTIN 00020352628158
Generic Product Category Tankless Water Heater
Energy Source Natural Gas
Flow Rate @ 35 F Rise 9.0 GPM
Flow Rate @ 45 F Rise 8.4 GPM
Water Connection 3/4 Inch
Gas Connection 3/4 Inch

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