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Ranein

Ranein Natural Gas Tankless Water Heater, Indoor Max 5.3 GPM, 130,000 BTU Instant Hot Water Heater

Based on 506 reviews
Condition: New
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$609.00
Save $190.99 was $799.99

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At a glance

Condition
New
Material
5.3GPM 130,000 BTU (Indoor)
Style
Natural Gas
Model
RH13K-NG-FC-RATING
Capacity
5.3 gal
Dimensions
14.17"W x 23.15"H
Weight
38 lb
In the box
Assembly Kit x1Manual x1Tankless Water Heater x1Vent Pipe x1
Warranty
2 Year Manufacturer

Features 5

  • Fans Placed Underneath: It will be more secure in terms of safety, and no smoke backflow will occur. The blower has large power and can automatically adjust the rotating speed according to the change of external wind pressure and the change of water temperature to provide sufficient oxygen for gas combustion, ensuring full combustion and safer use. Low noise and longer service life.
  • 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.
  • Easy to Assemble and Use: Uses standard 1/2" NPT water inlet fittings and 3/4" NPT air inlets for quick installation. Its compact size of 23.15"L x 14.17" W x 5.9"H takes up almost no space. If you have any questions about installation and operation, please do not hesitate to contact us and we will serve you wholeheartedly.
  • Wide Application: 130,000 BTU high heating capacity and maximum 5.3 GPM. It is suitable for 3-5 outlet points, which can satisfy whole family.

Specs 20

Brand Ranein
Capacity 5.3 Gallons
Power Source Natural Gas
Product Dimensions 14.17"W x 23.15"H
Special Feature LED Display
Color Gray
Wattage 3.794E+4
Voltage 120 Volts (AC)

Frequently asked questions

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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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Top Amazon Reviews

A bargain, but size the heater for your household usage.
Material Type: 3.6GPM 80,000BTU (Indoor) Style: Propane
My twenty year old 40 gallon (traditional) hot water heater finally sprung a massive leak, leading me to research LPG heaters that were available. My recollection is that the heater cost around $300 in 2005. The local big box hardware chains had heaters that began around 800 and seemed to accelerate from there. Since I live by myself, this seemed to be overkill, when I had the bright idea to look at tankless heaters. The chains had some that were even more expensive. Then, I checked Amazon. I found this 3.8 gpm / 80000 BTU heater on a black Friday price of $239, with a minor delay in delivery. For the price difference, I thought I would give it a try. I also ordered a HYDRO MASTER Tankless Water Heater Service Valve Kit (62.46) to provide fittings for the water connections. I waited a couple more days for my friend (Thank you, Andrew) to assist me in mounting and plumbing the unit in. His expertise, while not absolutely necessary, allowed me a two hour installation, with no leaks. He helped me determine additional parts necessary (PEX fittings, PEX hose, exhaust pipe and couplings available locally (around $120). (One caveat: when attaching the water valves to the unit, use teflon tape and teflon paste to seal. Do not apply too much torque when installing, it can be difficult to counter hold the connection.) All plumbed up, turned on the cold and hot water valves, plugged in the electric, turned on the LPG, no leaks. turned on the hot water spigot and the unit fired right up, I could not have asked for a better outcome. I noted on the outside of the cover, the date of purchase and the 1 year warranty. We'll see how long it lasts. ... show more
Reviewed in the United States on December 9, 2025 by The Guy Who Owns Fast Cars
I love this water heater!!
Material Type: 4.3GPM 100,000BTU (Indoor) Style: Propane
The media could not be loaded. 2nd edit!—— it’s been almost a year and want to say through the winter I was almost certain it was going to be broken with the water frozen even inside the house, we had issues with the gas company (propane) blot being able to come fill so we went without heat off and on all winter, we ended up just filling a 100lb cylinder every 2 days 😳 it was expensive. But during the times we didn’t have heat and inside froze my fridge broke, (water and ice don’t work) all shut offs busted when we got heat and water thawed. But the shut offs to this didn’t! And it didn’t break! We’re still going strong and still working properly 🙌🏻 Editing to update, it’s now been about 3 months and I love this so much! Bills went down about 100$ 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
Great water heater. Highly recommend.
Material Type: 8.5GPM 190,000 BTU (Indoor) Style: Propane
Review Image by KK KK
Review Image by KK KK
Great product. It’s been 4 months or so since install and it’s working perfectly. Two showers+laundry+ 2 sinks running all at same time and keeps it at the temperature all day long. It heats up 75°F to 120°F in roughly 5-7secs. Super fast. Propane is really expensive here at Hawaii. This’ll save us a lot of money. One small thing is the installation instructions aren’t that great. And it didn’t come with the top bolt/screw thing it tells you to use to hook it on first. Just wall screws and anchor. Ended up not using it. Just bolted it to a 2x4 I installed on the wall. Much easier and more sturdy like this. Other than that installation is straight forward. ... show more
Reviewed in the United States on July 14, 2025 by KK KK
Don't buy
Wish I could give it zero. First one went out within about 3 months. They tried saying it was because of temps outside and that it needed to be drained after each use. They did send a replacement though (which I had to pay to install again) which has lasted almost a year. It never seemed to operate correctly though, it would whine and wouldn't work in the kitchen sink unless the tub was on as well. Now it keeps giving E2 code for flameout. I have reached out almost a week ago and nothing and again reached out today. ... show more
Reviewed in the United States on December 1, 2025 by Dylan Hartley
Money well spent
Material Type: 4.3GPM 100,000BTU (Indoor) Style: Natural Gas
Converted my mobile home from a tanked system to this some time ago. Vented it vertically against the instructions recommendations which made me nervous at first but it works great. Hot water on demand always. Showers, baths, laundry. All good. Occasionally it times out on me while doing dishes but I just turned the water off then on again. Does not require any push of a button in the event of a power outage if you have it installed somewhere not quite so convenient like myself but it is very compact so you could always put it somewhere more accessible if you can route the plumbing and exhaust. ... show more
Reviewed in the United States on December 28, 2025 by Adam
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