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Natural Gas Tankless Water Heater with Vent Pipe, Indoor Max 3.6 GPM, 80,000 BTU Instant Hot Water Heater

  • Based on 346 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon

Arrives Wednesday, Jun 4
Order within 4 hours and 24 minutes
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Material Type: 3.6GPM 80,000BTU (Indoor)


Style: Natural Gas


Features

  • Performance: The on-demand tankless water heater boasts a heating capacity of 80,000 BTU and a hot water flow rate of 3.6 gallons per minute (GPM). It can provide continuous hot water for 2-3 water supply points, making it sufficient to meet the hot water needs of a household's bathroom, kitchen, and bar area.
  • No Waiting Required: Unlike traditional tank water heaters, tankless water heaters eliminate the need for a 30-minute preheating wait time, allowing you to have unlimited hot water on demand.
  • Provides 4 modes: Dish mode(100F), Fruit mode(95F), Elderly mode(104F) and Infant mode(107F). More convenient for you to use.
  • Recommendation: We strongly advise that all installations of the device adhere to local building and plumbing regulations at the installation location, and should be carried out by licensed professionals.(Not recommended for areas over 2,000 feet)

Brand: Ranein


Product Dimensions: 19.09"W x 7.67"H


Special Feature: Dry Combustion Protection, Flame Failure Protection


Color: Gray


Voltage: 120 Volts (AC)


Brand: ‎Ranein


Product Dimensions: ‎19.09"W x 7.67"H


Special Feature: ‎Dry Combustion Protection, Flame Failure Protection


Color: ‎Gray


Voltage: ‎120 Volts (AC)


Maximum Flow Rate: ‎3.6 Gallons Per Minute


Maximum Temperature: ‎149 Degrees Fahrenheit


Efficiency: ‎[NI] Not Indicated


Mounting Type: ‎Wall


Is Electric: ‎No


Manufacturer: ‎RANEIN


Item Weight: ‎22.7 pounds


Country of Origin: ‎China


Item model number: ‎RH8K-NG


Special Features: ‎Dry Combustion Protection, Flame Failure Protection


Included Components: ‎Tankless Water Heater x1, Use’s Manual x1, Vent Pipe x1, Assembly Kit x1


Batteries Included?: ‎No


Batteries Required?: ‎No


Date First Available: May 31, 2023


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Jun 4

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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Top Amazon Reviews


  • I love this water heater!!
Material Type: 4.3GPM 100,000BTU (Indoor) Style: Propane
The media could not be loaded. Editing to update, it’s now been about 3 months and I love this so much! Bills went down about 100$ and it’s just perfect! I got this about 3/4 weeks ago it’s been installed 3 weeks or so. My dad installed and I was helping. It was easy to install and hook up. The packaging comes with everything basically, you need to hook up. I’m pretty sure we had to buy the shut offs. But either way it’s cheap and works great. I have 5 kids almost 6-11 years old plus 3 adults. So far no problems with it heating and keeping temperatures. It’s quiet and definitely space saving!!! So now I can use the bathroom closet instead of having a big tank taking up all the space. This is the propane not natural gas. Sorry for the long video review but wanted to let people to know some details cause I was hesitant my own self after reading some of the reviews. Questions for will it work or not work cause I was told by Lowe’s a few years ago I need a 9-11gpm for the people I have in household. It’s actually by faucets and the rating they have and how many you have and want running at the same time. So I bought all my fancy faucets (waterfall, rain shower head) etc from Amazon as well and they do take a good bit of water output so I just checked the output and f it, let’s give this a try. My main concerns was the reviews like “I got propane but it won’t work it’s only for natural gas” or “it leaks upon installation or after a few days” I’ve had it for almost 3 weeks and it’s been good to us no leaks nothing. I’d definitely recommend this tankless heater ... show more
Reviewed in the United States on August 23, 2024 by Jessica williams

  • Awesome right out of the box.
Material Type: 3.6GPM 80,000BTU (Indoor) Style: Propane
Replaced a failed Chinese on demand propane water heater with this 3.5gpm model. Very easy to set up. Worth noting the water lines in and out of this are not pipe thread. I figured out they were same as the inlet on bottom of a toilet. I bought 2 toilet feed braided lines with sharkbite on/off valve built in, works great. Great h2o heater so far. ... show more
Reviewed in the United States on January 5, 2025 by Dana Dana

  • much better than a gas water tank
Material Type: 3.6GPM 80,000BTU (Indoor) Style: Natural Gas
The media could not be loaded. I installed the gas tankless water heater using the 1/2 pex with insulation in the outside storage (outside temp 59, I set 120 for hot water), and it's amazing how this unit works well and is easy to handle. It takes about 25-35 seconds to get hot water depending on the distance. It takes 2-3 mins to get gas through at the first time. This unit is great for a family of 3-4 people. I'll install the safety valve later after 3 months. I like to recommend it if you need a new water heater. less space, less weight, and less gas. ... show more
Reviewed in the United States on January 17, 2025 by JSF

  • LOVE IT
Material Type: 7.4GPM 190,000 BTU (Outdoor) Style: Propane
LOVE THIS ON DEMAND HOT WATER HEATER TANKLESS TOOK ABOUT 4 HOURS TO INSTALL ONLY BECAUSE WE REDONE OUR PIPES ON A DIFFERENT SET UP OTHER THEN THAT IT WAS A EASY INSTALL DIDNT COME DAMAGED OR DINTED
Reviewed in the United States on January 29, 2025 by Loren Jones

  • Good economy heater for one of two devices
Material Type: 3.6GPM 80,000BTU (Indoor) Style: Propane
Seems to be a good unit. I have it installed in a slightly heated office area in my pole barn (maybe 50-55*) I wasn't happy with the heat output on just one device (a hose to wash cars) I simply made the switch to 3/4" cold feed line. That has helped a lot. You might not need that but it can't hurt. My current ground water temp is also in the mid 40's so that's not helping the speed of the warm up either. Overall I'm happy with the unit as I bought it as a small unit for a sink and hose Super easy to install as long as you've done one before ... show more
Reviewed in the United States on January 23, 2025 by Edward J. Purcell Jr. Edward J. Purcell Jr.

  • Quality machine
Material Type: 5.3GPM 130,000 BTU (Indoor) Style: Natural Gas
Fairly easy to install. A bit louder than I anticipated, but heats water very effectively. I will update later.
Reviewed in the United States on January 22, 2025 by Daniel Behrens

  • Efficient heater.
Material Type: 4.3GPM 100,000BTU (Indoor) Style: Propane
So far, we LOVE this heater. Uses half as much propane as our old tanked water heater. Perfect for us, small home, only two people. Takes up so much less room. Also, it’s quiet. One thing to note: our home is older and all cinder block and our laundry room is the coldest place in the house. This heater does not have freeze protection as far as I can tell. So, I wrapped it with some heat tape and it’s golden!👍Inexpensive fix. Thanks Ranein for the check up call, very much appreciated! ... show more
Reviewed in the United States on December 26, 2024 by Leeloo

  • Great Appliance!!
Material Type: 4.3GPM 100,000BTU (Indoor) Style: Natural Gas
Works flawlessly!! Water gets really hot really fast!! 100/100 would recommend! Easy installation and quick setup once installed!
Reviewed in the United States on January 21, 2025 by Aaron

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