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Rheem

Rheem RTG-70XLN-3 High Efficiency Non-Condensing Outdoor Tankless Natural Gas Water Heater, 7.0 GPM, Gray

  • Based on 63 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Thursday, Jul 16
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Size: 7.0 GPM (No WiFi)


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 outdoor installation, this high-efficiency tankless natural gas water heater features a durable 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-70XLN-3 High Efficiency outdoor non-condensing natural gas tankless gas water heater delivers continuous hot water with minimal wait, saving time, energy and water. The RTG-70XLN-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 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: ac_dc


Product Dimensions: 13.5"W x 20.75"H


Special Feature: Self diagnostic program, hot-start programming, freeze protection, low activation flow rate, EZ-link cable, digital display See more


Power Source: ac_dc


Special Features: Self diagnostic program, hot-start programming, freeze protection, low activation flow rate, EZ-link cable, digital display


Flow Rate: 7 Gallons Per Minute


Maximum Temperature: 140 Degrees Fahrenheit


Heat Output: 160000 British Thermal Units


Efficiency: high


Mount Type: Wall


Is Electric: No


Capacity: 7 Gallons


Item Dimensions W x H: 13.5"W x 20.75"H


Item Weight: 39.3 Pounds


Item Depth: 9.4 inches


Material Type: Stainless Steel


Brand Name: Rheem


Model Number: RTG-70XLN-3


Manufacturer: Rheem


UPC: 020352761206


Manufacturer Part Number: RTG-70XLN-3


Included Components: Display


Item Type Name: Water Heater


Color: Gray


Style Name: Natural Gas - 7.0 GPM


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Jul 16

This item is non-returnable:

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

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • Hot Water All The Time
Size: 7.0 GPM (No WiFi) Color: Gray
Great heater. Very dependable and I never gave to run out of hot water again
Reviewed in the United States on December 30, 2025 by Boliver Shagnasti
    • Works perfectly
Size: 7.0 GPM (No WiFi) Color: Gray
Shipped fast, package was in great shape, installed replacing my old Unit in 40 mins. Works great for a 1 shower, 1 bath, all faucets running at the same time. 120 degrees in 10 seconds. I'm a handyman by trade and would recommend this over most units. However, it's only been a week. If I have problems, I'll be back with an update. ... show more
Reviewed in the United States on December 28, 2025 by Cabledog
    • Horrible Experience, don't buy this!
Size: 7.0 GPM (No WiFi) Color: Gray
I wish I could leave negative stars! we received a unit that is defective, the electrical system doesn't work, the warranty people gave me the runaround and tell me they'll send an electrician within a business day, customer service had a bad attitude, freaking awful experience, no hot water for a long time and not much support. I would definitely buy any other unit and stay away from Rheem!! ... show more
Reviewed in the United States on January 27, 2026 by Marcia Roddy
    • Small size but enough to keep up demand 3 bathrooms.
Size: 7.0 GPM (No WiFi) Color: Gray
Great tank less, never run out of hot water again. And super easy normal person installation
Reviewed in the United States on February 6, 2026 by Amazon Customer
    • Works well
Size: 7.0 GPM (No WiFi) Color: Gray
Good but delivery ain’t so good l. Was already opened when I got it which was odd but it does really work
Reviewed in the United States on February 24, 2025 by Andy Li
    • Great item was very easy to install
Size: 7.0 GPM (No WiFi) Color: Gray
Works great should of had it years ago. Will never be without one again.
Reviewed in the United States on November 21, 2025 by Gerald L Hash
    • Replacing electric water heater
Size: 7.0 GPM (No WiFi) Color: Gray
Installed this to transition my water heating to gas for economy. This unit hung on the basement wall and didn't require an enclosure except for some sheet metal to encase the feed pipes. Original heater was left in place and valved off as a backup. This unit produces a nice flow of hot water that continues until you shut the water off. It takes a bit longer to heat up due to the gas startup and the added 12' of piping which is to be expected, but it is only about 5 to 10 seconds depending on which faucet is being used. It only runs when the water is turned on, so no tank heating is required. I think it is going to save me a noticeable amount on my electric bill even after the gas bill hits. ... show more
Reviewed in the United States on January 4, 2025 by L. Smith
    • Great classes
Size: 7.0 GPM (No WiFi) Color: Gray
Awesome
Reviewed in the United States on February 15, 2026 by melton

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