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Rinnai RL75iN Natural Gas Tankless Water Heater, 7.5 Gallons Per Minute

by Rinnai
4.3 out of 5 stars 75 customer reviews
| 48 answered questions

Price: $998.98 & FREE Shipping. Details
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  • no fabrics
  • Imported
  • 10,300 - 180,000 BTU
  • Comes standard with MC-91-1US Digital Controller with Error Code Indicator
  • 82% Thermal Efficiency
  • Residential Temperature Settings: 98°F - 140°F
  • Commercial Temperature Settings: 98°F - 160°F (commercial controller must be purchased separately)
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$998.98 & FREE Shipping. Details In Stock. Ships from and sold by Amazon.com. Gift-wrap available.

Frequently Bought Together

  • Rinnai RL75iN Natural Gas Tankless Water Heater, 7.5 Gallons Per Minute
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  • Rinnai 223182 All-Weather Termination Kit, 21-Inch
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Total price: $1,185.78
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Product Description

Product Description

Rinnai Residential/Commercial Tankless Water Heater, Interior, max. Btu 180,000, 7.5gpm w/Valve Kit Silver

From the Manufacturer

Stop planning your mornings and evenings around your water heater. Set your own schedule, thanks to the R75LSi. Ideal for two- to three-bathroom homes, the R75LSi delivers up to 7.5 gallons of hot water per minute (GPM), while saving energy and money. Mount your compact R75LSi in virtually any room, and vent directly to the outside with a single wall or roof penetration.

Product Information

Technical Details

Part Number RL75iN
Item Weight 45 pounds
Product Dimensions 14 x 9.3 x 23 inches
Origin Japan
Item model number RL75iN
Size Large
Color Silver
Item Package Quantity 1
Certification Energy Star
Batteries Included? No
Batteries Required? No
Warranty Description 12-Year Warranty on Heat Exchanger, 5 Year Parts, 1 Year Labor for Residential Installations

Additional Information

ASIN B0058DPG1C
Customer Reviews
4.3 out of 5 stars 75 customer reviews

4.3 out of 5 stars
Best Sellers Rank #71,014 in Home Improvements (See top 100)
#100 in Home Improvement > Rough Plumbing > Water Heaters & Parts > Water Heaters
Shipping Weight 65.9 pounds (View shipping rates and policies)
Domestic Shipping This item is also available for shipping to select countries outside the U.S.
International Shipping This item can be shipped to select countries outside of the U.S. Learn More
Date First Available June 27, 2011

Warranty & Support

Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

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Customer Questions & Answers

Customer Reviews

Top Customer Reviews

The Rinnai water heater works well and saves energy but there are some issues that are specific to these water heaters and I am going to tell you the whole truth.

Venting: The exhaust/combustion air vent is tested and listed for the unit and you can't use any other vent. It uses outside air for combustion and is very safe. The direct vent sealed combustion vent allows Rinnai to be installed in bath rooms and bed rooms where traditional B-Vent water heaters cannot. There are limitations of how far away and were you can terminate the vent, check out the installation manual for that.

Hot Water: It will make endless hot water until you turn off the tap, a minute, an hour, a week. It can only supply so much at a time, depending on your cold water temperature it will only run two or three fixtures at once. It is an `on demand' water heater, not an `instant' water heater, hot water will take longer to arrive at the fixture than it will from a tank water heater.

Gas Supply: These water heaters use less fuel than a tank style water heater but when they want fuel, they want it now. Your tank style water heater required a gas supply of about 40,000 btu's per hour, your Rinnai will require 180 to 199,000 btu's per hour. Check you gas supply lines to make sure they have enough capacity for the new load or your new water heater won't perform to its potential without upgrading the supply line.

Expect some maintenance: This is an energy saving, high tech machine with a combustion fan, pc board and electronic solenoid valves to control water and gas flow. Your water quality will also determine how often the unit will need to be flushed, generally every one or two years.
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6 Comments 228 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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My gas hot water heater just died. Got quotes to replace with similar. Quotes ran from $1800 to $1250 installed. The tankless unit priced out at $2000 installed which included adding a larger gas line and tapping into electric. $300 fed tax credit, $100 from Rinnai and $150 from my nat gas company gets me to $1450. So for $200 I made the leap to tankless and should save at least that much in gas first year.

First shower tonight right after install. Plenty of hot water. Can't speak to fluctuations as it was still clearing air in the lines. I gave it 4 stars only because it is too soon in ownership to award it 5 stars. More later...assuming I can update this later.

Jan 23, 2012 Update:
Update: It definitely takes a little longer to get hot water (30 seconds-1 minute). Of course once someone gets hot water upstairs the first time in the morning the lag time isn't really noticeable. And there is a "cold water sandwich" effect as mentioned on the Rennai site. I tend to get wet (turn water off), soap up, wash, (turn water on) and rinse. When I turn the water back on there is a short burst of cooler water. then right back to hot. This is more a function of how I shower but it is a consideration. Of course if you leave the hot water on it stays hot and you never run out. No issues with multiple showers - washing clothes - running dishwasher. It really delivers the hot water. I have a 5 person household (with 4 women).

So I recommend it. Even with the slight delay I keep thinking about all the time I am not paying to heat and reheat water. No real data on cost savings yet.
7 Comments 140 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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We installed an R75l for propane just about 4 years ago. It's just my wife and me, so we don't use an excessive amount of hot water. We also have softened well water. The unit worked fine for 2 years, then began to act flakey. Hot water would cut out, the flame would go out, or there would be wide temperature variations. We tried finding a 'certified Rinnai technician.' Well, there aren't many in my area. One of them wouldn't even talk to me because I wasn't one of his gas customers. I finally did get one guy who visited twice, didn't solve the problem and refused to come back. My gas company, while not on the Rinnai list, does have some experience and managed to fix the problem - also in two service calls. It involved basically taking the thing apart and resetting all the sensors. That was just about a year ago. All was well until last week and now it's doing it again. So, we're going for week without hot water. So it's looking like I have to put at least 300 bucks a year into this thing for maintenance. That's in addition to flushing out the unit yearly with vinegar, which is thankfully something I can do myself - involves pumping 4 gallons of vinegar through the thing for 45 minutes. I'm looking forward to getting rid of this thing when I change my heating system, but for now I'm stuck with this thing. Oh, an Rinnai customer service? Very nice folks, but totally useless. The problem is NEVER the unit - it's the water, it's the gas/water pressure, the gas company's fault...etc. So....if you're looking at this, talk to your gas supplier, talk to your plumber. See how many people in your area can service this thing before you sink your cash into it. By the time I can change this out, I will have paid for it again.
32 Comments 189 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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