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Rheem

Rheem RTG Series 7.0 GPM Natural Gas Tankless Water Heater Indoor | 160,000 BTUs High Efficiency On Demand, Continuous Hot Water | Non-Condensing

  • Based on 60 reviews
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Availability: In Stock.
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Size: 7.0 GPM (Standard)


Color: Gray


Features

  • High-efficiency tankless gas water heater delivers up to 7.0 GPM, perfect for 23 bathroom homes with multiple hot water needs like showers and laundry.
  • Powered by natural gas with 160,000 BTUs, this durable tankless unit ensures fast, reliable hot watereven during peak household demand.
  • Designed for indoor installation, this high-efficiency tankless natural gas water heater features a durable, compact metal cabinet and supports easy wall mounting by a qualified installer.
  • Hot-start programming prevents cold water bursts, making this tankless natural gas water heater ideal for back-to-back showers.
  • Rheem RTG tankless gas water heaters offer high-efficiency, space-saving designs with multiple models to fit any home size, fuel type, and hot water demand.

Description

Rheem’s RTG-70DVLN-3 High Efficiency indoor non-condensing natural gas tankless gas water heater delivers continuous hot water with minimal wait, saving time, energy and water. The RTG-70DVLN-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 LeakGuard Leak Detection and Prevention monitors for potentially costly leaks providing you 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


Capacity: 7 gallons


Power Source: Natural Gas


Product Dimensions: 13.5"W x 24.2"H


Special Feature: Integrated Digital Display, Hot-start Programming, High Energy Efficiency, Universal Venting Compatibility, 1/2 Gas Line Compatibility See more


Power Source: Natural Gas


Special Features: Integrated Digital Display, Hot-start Programming, High Energy Efficiency, Universal Venting Compatibility, 1/2 Gas Line Compatibility


Wattage: 132 watts


Voltage: 120 volts


Flow Rate: 7 gpm


Maximum Temperature: 140 °F


Heat Output: 160000 british thermal units


Mount Type: Wall


Capacity: 7 gallons


Item Dimensions W x H: 13.5"W x 24.2"H


Item Weight: 46.5 pounds


Item Depth: 10.27 inches


Material Type: Stainless Steel


Brand Name: Rheem


Model Number: RTG-70DVLN-3


Number of Items: 1


Unit Count: 1 Count


Manufacturer: Rheem


Manufacturer Warranty Description: 1 Year Labor, 15 Year Heat Exchanger, 5 Year Parts


UPC: 020352761183


Included Components: Display


Item Type Name: Water Heater


Manufacturer Part Number: RTG-70DVLN-3


Color: Gray


Style Name: Natural Gas, 7.0 GPM, Indoor


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sep 1 – Sep 3

This item is non-returnable:

Non-returnable. Transportation of this item is subject to hazardous materials regulation

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

    • Very well made and economical
Size: 7.0 GPM (Standard) Color: Gray
I have owned this tankless hot water heater for a year and half so far. It has worked great, very little maintenance. I live in an area with very hard water, so flush the unit with distilled white vinegar twice a year to keep it working like new. I can take a shower, do laundry and use my dishwasher at the same time and never run out of hot water. It has saved me a great deal of money versus my old electric hot water heater. This is a natural gas unit and uses so little gas, it has only raised my gas billed about $2 or $3 per month, when not in use, it is so much more economical than previous electric hot water heater. I can't say enough good things about it, love it. ... show more
Reviewed in the United States on July 4, 2026 by William Shoop
    • ⭐ Rheem Tankless Water Heater – Peace of Mind and a Major Upgrade for My Family
Size: 7.0 GPM (Standard) Color: Gray
Review Image by CE
Review Image by CE
Review Image by CE
⭐ Rheem Tankless Water Heater – Peace of Mind and a Major Upgrade for My Family A couple of months ago, our traditional water heater failed unexpectedly. We didn’t have hot water for days, and with a family of four, that quickly became stressful. I started researching alternatives and decided to try a tankless system—something more modern, energy-efficient, and ideally less prone to failure. I landed on this Rheem unit and took the plunge. ⸻ 🛠️ My Setup Experience I’ve done some home improvement projects in the past, so I was comfortable tackling this. I took my time preparing and reading up on installation basics. It required planning—especially around venting and connecting to the existing setup—but once installed, the heater powered up, and hot water came on right away. One of the features I really appreciated was how compact the unit is. Once mounted, it freed up a lot of space where the old tank used to sit. I even took the opportunity to clean up and reconfigure the whole area—it felt like a reset for our utility space. ⸻ ✅ Real-World Benefits We’ve Noticed • Hot water is always ready. No more cold surprises in the middle of a shower. • Energy efficiency – It only runs when needed, unlike tank heaters that constantly keep water warm. • Space-saving – It cleared out floor space and helped make the room feel more open. • User-friendly display – The interface is simple, and adjusting the temperature takes seconds. ⸻ 💡 Lessons Learned One thing I really value is peace of mind—especially when I’m not home and my family needs something to work without fail. This unit delivered that. We’ve had guests stay over, and the system handled the extra demand effortlessly. My kids now even comment on how the water heats up “way faster than before.” ⸻ ⚠️ A Few Tips • The unit does require a dedicated power source and venting, so plan ahead. • For homes with multiple bathrooms, I’d recommend checking the flow rate to ensure it fits your household needs. ⸻ 🔚 Final Thoughts: This upgrade has made a noticeable difference in our daily routines. It’s dependable, efficient, and has already made our home feel a little more modern. I’m happy I made the switch and would definitely recommend this to anyone looking for a long-term hot water solution. ⸻ Let me know if you’d like this adapted for Inspire format, a quick summary caption, or a visual storytelling layout. ... show more
Reviewed in the United States on July 9, 2025 by CE
    • Great product/price
Size: 7.0 GPM (Standard) Color: Gray
Rheem has always made a great product and this unit is one of them
Reviewed in the United States on July 25, 2026 by Will Noble
    • Endless hot water
Size: 7.0 GPM (Standard) Color: Gray
So far so good works well and water stays hot. Got it installed for 500 so happy with that
Reviewed in the United States on May 27, 2026 by Robert Baker
    • Very Satisfied
Size: 7.0 GPM (Standard) Color: Gray
Very satisfied with this water heater. Easy install as a replacement for previous tankless W.H. Had to purchase all new venting which was pricey but high quality.
Reviewed in the United States on June 16, 2026 by D Construct
    • Works well but you will be waiting a while for the water to get hoy
Size: 7.0 GPM (Standard) Color: Gray
Works well. Only issue is it takes a long time to get hot
Reviewed in the United States on August 15, 2025 by Nicole
    • surprisingly quiet
Size: 7.0 GPM (Standard) Color: Gray
It's quieter and flows water faster than the Rinnai brand water heater it replaced. The Rinnai exhaust is compatible with this unit. No issues or concerns... yet.
Reviewed in the United States on August 7, 2026 by parajared
    • Special venting required
Size: 7.0 GPM (Standard) Color: Gray
Requires special venting pipe otherwise an amazing unit
Reviewed in the United States on May 11, 2026 by mike

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