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Rheem

Rheem RTG-84XLP-3 High Efficiency Non-Condensing Outdoor Tankless Liquid Propane Water Heater 8.4 GPM, 180,000 BTUs

  • Based on 65 reviews
Condition: New
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Availability: In Stock.
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Arrives Feb 25 – Feb 27
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Size: 8.4 GPM (Non-WiFi)


Color: Gray


Features

  • High-efficiency tankless gas water heater delivers up to 8.4 GPM, perfect for 23 bathroom homes with multiple hot water needs like showers and laundry.
  • Powered by liquid propane with 180,000 BTUs, this durable tankless unit ensures fast, reliable hot watereven during peak household demand.
  • Designed for outdoor installation, this high-efficiency liquid propane tankless 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 liquid propane tankless 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-84XLP-3 High Efficiency outdoor non-condensing liquid propane tankless gas water heater delivers continuous hot water with minimal wait, saving time, energy and water. The RTG-84XLP-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: 8.4 Gallons


Power Source: ac_dc


Product Dimensions: 13.5"W x 20.75"H


Special Feature: Hot-start Programming, 1/2 gas line compatibility, compact design


Brand: ‎Rheem


Product Dimensions: ‎13.5"W x 20.75"H


Special Feature: ‎Hot-start Programming, 1/2 gas line compatibility, compact design


Color: ‎Gray


Voltage: ‎120 Volts


Maximum Flow Rate: ‎8.4 Gallons Per Minute


Maximum Temperature: ‎140 Degrees Fahrenheit


Efficiency: ‎0.82 UEF" or "34% more efficient than a standard 50-gallon tank


Style: ‎Liquid Propane - 8.4 GPM


Mounting Type: ‎Wall


Is Electric: ‎No


Manufacturer: ‎Rheem


Item Depth: ‎9.4 inches


UPC: ‎020352761282


Part Number: ‎RTG-84XLP-3


Item Weight: ‎39.2 pounds


Item model number: ‎RTG-84XLP-3


Size: ‎8.4 GPM (Non-WiFi)


Finish: ‎Stainless Steel


Item Package Quantity: ‎1


Special Features: ‎Hot-start Programming, 1/2 gas line compatibility, compact design


Included Components: ‎Display


Batteries Required?: ‎No


Date First Available: October 23, 2023


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Feb 25 – Feb 27

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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  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

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Similar Products

Top Amazon Reviews

    • Very happy so far.
Size: 7.0 GPM (Non-WiFi) Color: Gray
Took about half a day to install it. We went out and bought a tall 23 gal. Propane tank. Got it filled for about $100. Now we will see how fast we go through the propane. We started with the temp at 120 degrees. Wasn't quite hot enough. We turned it up to 130 degrees and we are getting plenty of hot water! Doesn't take long for the water to get warm. But it's only a short distance from the Master bathroom. The 2nd bathroom takes a little longer. It's the guest bathroom, so not too concerned. The unit itself isn't too big. It's mounted to the house on the outside above where the old tank was. Actually looks very clean and nice. Hoping this continues to work perfectly for a very long time. :) ... show more
Reviewed in the United States on March 24, 2025 by Diana B
    • Not working
Size: 9.5 GPM (Non-WiFi) Color: Gray
The media could not be loaded. Heater doesn’t work. It beeps and has an error code that keeps coming on and water not getting hot. Contacted seller will advise
Reviewed in the United States on December 16, 2025 by Robyn G Davis
    • The right product.
Size: 7.0 GPM (Non-WiFi) Color: Gray
Need a high altitude water heater for our 4 stall shower house at a mountain campground. This did the trick! Works better than expected.
Reviewed in the United States on October 30, 2025 by J. Powell
    • Impressive
Size: 7.0 GPM (Non-WiFi) Color: Gray
I owned a competitors it worked This is very nice technology Safe and very efficient I'm sold... One thing is the company parts department is lacking... I called to get the cover for pipes long wait time 55minutes got transferred to warehouse they said yes we have 450 in stock... Cool can I get one? Yes go online and place incart select buy... You think I didn't already try that? Anyways it said in-stock placed in cart than said no longer for sale. Called next day waited again long time the said I'd have to buy a whole install kit I didn't need said okay went to buy it and wouldn't you know it unavailable. I'm very understanding but this is just a cosmetic pipe cover for a brand new unit. What if it's a important part? Heater 5 stars customer service 1 star Could be a deal breaker for some But I've never called competitors customer service I'm sure it's just a similar run around Best heater I've owned ... show more
Reviewed in the United States on March 21, 2024 by Amazon Customer
    • Unlimited hot water at last
Size: 7.0 GPM (Non-WiFi) Color: Gray
Outstanding unit, provides all the hot water a small family will need and only costs pennies to operate compared to a tank type water heater
Reviewed in the United States on September 30, 2025 by kenneth thomas
    • would not work
Size: 8.4 GPM (Non-WiFi) Color: Gray
piece of CRAP, i have installed three Rheem water heaters, this one lost me over 800.00 as we installed it an airbnb and it kept going out on us, so the gas company did their thing and that didn't work, plumber tried to help, nothing. so i had two cancellations and a bad review becasue of this wtr htr. I have had no issues with the other Rheem products, but this one was a nightmare. hoping to get my money back for it. ... show more
Reviewed in the United States on July 30, 2025 by Jonathan R. Wrightson
    • excellent hot water heater
Size: 7.0 GPM (Non-WiFi) Color: Gray
This replaces 15 year old Them tankless heater. The only issue is I run this on 40lb propane tank and had to upgrade regulator from 3/16" id hose to 3/8 id hose. On cold mornings I would get code 11 and if I turned on second hot water faucet got code 12. The 3/16" I'd line did not provide enough volume. Likely running on regular large propane tank would likely not be a problem. Would recommend at least 3/8" id line or larger. New regulator was rated at 160000 btu with 3/8" id line. Hot water heater is rated at 160000 BTU. ... show more
Reviewed in the United States on March 5, 2024 by Guy Donham
    • Provides enough hot water for our house
Size: 9.5 GPM (Non-WiFi) Color: Gray
We’ve been using it now for about a year. It’s lowered our electric bill by 1/3 which is awesome. Our home is about 2800 ft.² and it provides hot water to every portion.
Reviewed in the United States on August 31, 2025 by Michael Rodgers

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