Other Sellers on Amazon
Add to Cart
+ $38.11 shipping
Sold by: MyPlumbingStuff
Add to Cart
+ Free Shipping
Sold by: Vern's Wholesale
Add to Cart
+ $67.47 shipping
Sold by: Buy Plumbing
Have one to sell? Sell on Amazon

Image Unavailable

Image not available for
  • Rinnai RL75iN Natural Gas Tankless Water Heater, 7.5 Gallons Per Minute
  • Sorry, this item is not available in
  • Image not available
  • To view this video download Flash Player

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

by Rinnai
| 24 answered questions

List Price: $1,471.00
Price: $899.00 & FREE Shipping. Details
You Save: $572.00 (39%)
Only 7 left in stock (more on the way).
Ships from and sold by Amazon.com. Gift-wrap available.
  • 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)
See more product details
13 new from $850.99 1 used from $836.07
This item will be visible when delivered. To keep it a surprise, select This is a gift in checkout.

Frequently Bought Together

Rinnai RL75iN Natural Gas Tankless Water Heater, 7.5 Gallons Per Minute + Rinnai 223182 All-Weather Termination Kit, 21-Inch + Webstone 50443PR 3/4-Inch SWT Isolator EXP Tankless Water Heater Service Valve Kit
Price for all three: $1,111.90

These items are shipped from and sold by different sellers.

Buy the selected items together

Special Offers and Product Promotions

  • Buy Used and Save: Buy a Used "Rinnai RL75iN Natural Gas Tankless Water Heater, 7...” from Amazon Warehouse Deals and save 43% off the $1,471.00 list price. Product is eligible for Amazon's 30-day returns policy and Prime or FREE Shipping. See all Used offers from Amazon Warehouse Deals.
  • Get a $100 Amazon.com Gift Card: Get the Discover it chrome card and get a $100.00 Amazon.com Gift Card* after your first purchase within 3 months. Learn more.

Product Information

Technical Details
Part Number RL75iN
Item Weight58.4 pounds
Product Dimensions32 x 31 x 17.5 inches
Item model numberRL75iN
Item Package Quantity1
CertificationEnergy Star
Warranty Description12-Year Warranty on Heat Exchanger, 5 Year Parts, 1 Year Labor for Residential Installations
Additional Information
Best Sellers Rank #32,255 in Home Improvement (See top 100)
Shipping Weight58.4 pounds (View shipping rates and policies)
ShippingThis item is also available for shipping to select countries outside the U.S.
Shipping Advisory:This item must be shipped separately from other items in your order. Additional shipping charges will not apply.
Date First AvailableJune 27, 2011

Product Description

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.

Customer Questions & Answers

Customer Reviews

Oh, an Rinnai customer service?
Michael Maimone
If you are not a master plumber, I would recommend getting a very good plumber to install this for you.
Steve Larsen
Each unit has a Rinnai tankless hot water heater.
George Scarlatta

Most Helpful Customer Reviews

80 of 81 people found the following review helpful By M. Brooks on June 11, 2013
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.
Read more ›
1 Comment Was this review helpful to you? Yes No Sending feedback...
Thank you for your feedback. If this review is inappropriate, please let us know.
Sorry, we failed to record your vote. Please try again
88 of 93 people found the following review helpful By mersj on December 9, 2011
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 Was this review helpful to you? Yes No Sending feedback...
Thank you for your feedback. If this review is inappropriate, please let us know.
Sorry, we failed to record your vote. Please try again
100 of 111 people found the following review helpful By Michael Maimone on September 18, 2012
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.
21 Comments Was this review helpful to you? Yes No Sending feedback...
Thank you for your feedback. If this review is inappropriate, please let us know.
Sorry, we failed to record your vote. Please try again

Most Recent Customer Reviews