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Rheem

Rheem RRTGH90DVLN3701173 Rheem RTGH Series 9 GPM 180,000 BTU 120 Volt Residential Indoor Natural Gas Tankless Water Heater Stainless Steel

  • Based on 112 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Saturday, Jul 19
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Size: 9.0 GPM


Features

  • Flow rate of 0.4 - 9 GPM
  • Available temperature settings range from 100 to 140F (default setting of 120F)
  • Includes electric ignition
  • Covered under 1 year labor, 15 year heat exchanger, and 5 year parts manufacturer warranties
  • Width 17-11/16-in

Description

Rheem’s RTGH-90DVLN-3 Super High Efficiency indoor condensing natural gas tankless gas water heater delivers continuous hot water with minimal wait, saving time, energy and water. The RTGH-90DVLN-3 features exclusive Hot Start Programming which keeps the water heater in a ready state eliminating cold water bursts with back-to-back uses. Rheem’s exclusive Overheat Film Wrap provides heat exchanger overheat protection and peace of mind while you enjoy efficient, continuous, no wait hot water in your entire home. The compact size, wall mount and industry leading installation clearance allows for installation in small spaces, saving valuable floor space.

Brand: Rheem


Product Dimensions: 17.7"W x 23.7"H


Color: Gray


Voltage: 120 Volts


Maximum Flow Rate: 9 Gallons Per Minute


Brand: ‎Rheem


Product Dimensions: ‎17.7"W x 23.7"H


Color: ‎Gray


Voltage: ‎120 Volts


Maximum Flow Rate: ‎9 Gallons Per Minute


Maximum Temperature: ‎140 Degrees Fahrenheit


Heat Output: ‎1.8E+2 British Thermal Units


Efficiency: ‎0.93


Style: ‎Indoor Installation


Mounting Type: ‎Wall


Is Electric: ‎No


Manufacturer: ‎Rheem


Item Depth: ‎9.8 inches


UPC: ‎662021564307


Part Number: ‎Natural Gas


Item Weight: ‎59.9 pounds


Country of Origin: ‎Japan


Item model number: ‎RTGH-90DVLN-3


Size: ‎9.0 GPM


Item Package Quantity: ‎1


Included Components: ‎Product Only


Batteries Required?: ‎No


Date First Available: August 7, 2023


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Jul 19

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Leasing options through Acima may also be available during checkout.

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Top Amazon Reviews

    • Works great on 1/2 line
Size: 9.5 GPM (WiFi)
This thing runs great on our half inch gas line. All the plumbers wanted to upcharge me to run a new 3/4 inch line. This thing is kicking butt, zero issues.
Reviewed in the United States on May 25, 2025 by Ross Theriault
    • Space
Size: 8.4 GPM
Better space
Reviewed in the United States on May 25, 2025 by Garpin
    • Rheem RRTGH90DVLN3701173 tankless water heater
Size: 9.0 GPM
I replaced my old tankless water heater (Bosh) with this one almost one year ago . It was easy and has been working great.
Reviewed in the United States on May 2, 2025 by etcool
    • Good investment
Size: 8.4 GPM
Works well
Reviewed in the United States on April 28, 2025 by Amazon Customer
    • It works
Size: 9.5 GPM
It works good it makes hot water
Reviewed in the United States on May 20, 2025 by Amazon Customer
    • Bad customer service
Size: 9.5 GPM
bought this heater and installed it according to the installation manual. Turned it on and start using the hot water. This heater gave me code P1 and wouldn't heat up the water even though it was set to 120 C and subsequently to 140 C. Called service and we went through the diagnostics and the service technician and us couldn't find any problem and they said they will send a local plumber to diagnose the problem and hopefully fix it. Received an email from Rheem with the Plumber information. Called the plumber to setup an appointment and told him the heater gives P1 error message. He told me that P1 error is because of the aretor in the faucet because it is dirty and it is the homeowners responsibility to clean it and he doesn't need to come. I proceeded with opening bath tub that doesn't have anything and lots of water exits into the bath tub and still had the same issue. Called the Plumber back and told him about this and he said he will come the next day. He showed up the next day and without running any diagnostics he tried to sell me things that didn't have anything to do with the water flow (Code P1). I asked him to run diagnostics to locate the actual problem and the we can discuss his recommendations and he refused unless i agree with his upsales which i refused, because it had nothing to do with the actual problem reported by the heater "Code P1". I called the service again before I return the unit and they weren't able to help either. Finally, after trying my best and nothing anywhere I returned the Unit. Here an advise for Rheem: I have 46 years experience working for big corporations and service is the only interaction you have with your customers and you are really really really lacking in that!!!!!!!!!!! You need to investigate what happened here and correct the problems. You just lost a sale here and if you don't correct this you will lose a lot more!!!!! ... show more
Reviewed in the United States on May 24, 2025 by Studio Guy
    • Excellent Product
Size: 8.4 GPM
I love this unit. Installed it myself though wouldn't recommend someone do that if they don't have a reasonable amount of experience. Remember to clean the filter based on usage. If I had it to buy over again, I'd get get one with the next level of output.
Reviewed in the United States on March 24, 2025 by ross anderson
    • Easy installation and Top Performance
Size: 9.5 GPM
Thank You ! The unit arrived in good condition and we had it running in just a few hours. Sure feels great to have hot water again. What a performer !
Reviewed in the United States on March 16, 2025 by stitch

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