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Rinnai

Rinnai RUCS75iN Tankless Hot Water Heater, 7.5 GPM, Natural Gas, Indoor Installation

    • Based on 70 reviews
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Availability: 14 left in stock
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Arrives May 21 – May 22
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Features

  • Endless Hot Water: Our tankless hot water heaters let you enjoy unlimited hot water flow throughout the house with a compact and durable design that fits your home and lifestyle
  • Energy and Space Efficient Tankless Gas Water Heater: This small hot water heater conserves energy, only heating when necessary; Multiple venting options offer flexible placement, including PVC/CPVC using the Ubbink Concentric to Twin Pipe adaptor
  • Optimal Water Pressure: This tankless water heater offers a high-performance hot water flow rate up to 7.5 GPM for a powerful, constant stream that serves up to 6 appliances at once
  • Professional Installation Recommended: Visit the Find a Rinnai PRO page on our website to locate a qualified technician in your area to install your tankless water heater; We do not recommend installing a water heater without a technician
  • Guaranteed to Last: 12-, 5-, and 1-year residential factory warranty for heat exchanger, parts, and labor respectively

Description

The Rinnai Super High-Efficiency Tankless Water Heater is the ultimate solution for energy-conscious homeowners seeking a smart, compact, and efficient water heating system. This tankless hot water heater offers intelligent features and a durable design that provides an endless supply of hot water, making it perfect for households of all sizes. Enjoy unlimited hot water flow throughout your home, as well as a compact and space-saving design that conserves energy by heating water only when necessary, providing optimal energy efficiency. With a high-performance 7.5 GPM hot water flow rate, this tankless gas water heater delivers powerful and constant water pressure for a satisfying and uninterrupted stream. Say goodbye to low water pressure and enjoy a powerful hot water experience. Rest assured with our on demand water heater, backed by a guaranteed warranty. Enjoy a 12-year residential warranty for the heat exchanger, 5-year warranty for labor, and 1-year warranty for parts. Rinnai's super high-efficiency tankless water heater models offer advanced technology in water heating. Unlike traditional tank heaters that accumulate rusty sediments, our compact water heater elements have a longer lifespan as water runs continuously through the pipes.

Brand: Rinnai


Product Dimensions: 34"W x 14.5"H


Color: White


Voltage: 120 Volts


Maximum Flow Rate: 7.5 Gallons Per Minute


Brand: ‎Rinnai


Product Dimensions: ‎34"W x 14.5"H


Color: ‎White


Voltage: ‎120 Volts


Maximum Flow Rate: ‎7.5 Gallons Per Minute


Style: ‎Natural Gas, Indoor Installation


Manufacturer: ‎Rinnai


Part Number: ‎RUCS75iN


Item Weight: ‎63 pounds


Item model number: ‎RUCS75iN


Is Discontinued By Manufacturer: ‎No


Size: ‎7.5 GPM


Finish: ‎White


Shape: ‎Rectangle


Item Package Quantity: ‎1


Included Components: ‎Water Heater


Batteries Included?: ‎No


Batteries Required?: ‎No


Warranty Description: ‎See Manufacturer


Date First Available: June 23, 2015


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: May 21 – May 22

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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Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • Great so far!!
Color: White
I did a ton of research before purchasing and went with this unit. Had it professionally installed by my plumber and it is working great so far. We've been using it for a week now. Have had plenty of hot water with a family of 5. Showers and dishwasher running at same time, shower never ran out of hot water. The only thing (& I knew this is a possibility) is that it takes a while for the kitchen faucet to get "hot". But it is the farthest from the unit. Other than that we are completely happy with our Rinnai tankless. Hope it continues. ... show more
Reviewed in the United States on February 19, 2019 by Mark Wayland
    • If your on the fence, go for it
Color: White
We were on the fence about buying something like this thru amazon. We have had it for 3 mom that now, and I am still impressed. We did have it installed by our plumber. He was not too familiar with the brand, but he did some research, and is now switching to rinnai. He said installing was very easy, with multiple venting options. We have two large bath tubs, plus the normal house hold, dishwasher etc. we can fill both bath tubs, and run the dishwasher, and kitchen sink. Temp only drops 1.5 degrees. Definitely happy with the purchase! ... show more
Reviewed in the United States on December 2, 2020 by Crystal
    • Happy with this purchase
Color: White
Pros: Endless hot water, takes up less space, possible money savings in the long term Cons: small increase in the time until hot water, need for condensation drainage Note: both types require yearly maintenance, but the on-demand ones will fail quicker if you don't do it. Some say the on-demand units cost more but that isn't true if you compare high-efficiency units. The benefit of never running out of hot water outweighs everything for us. We never plan to go back to a tank heater ... show more
Reviewed in the United States on May 12, 2020 by Don
    • garden bath full of hot water
Color: White
Installed it myself. Directions are pretty straight forward but read them online before you buy so you know what you have to do. Install time with my sons help was only 4 hrs in the attic. Unit heats water fast and there is no additional delay for hot water than I had with my tank. It’s very quiet. I have run big tubs and a sing full blast hot for over 20 mins to test it out with no issues. ... show more
Reviewed in the United States on May 27, 2020 by mike gerlach
    • Hot water on demand of course
Color: White
Review Image by C. H. C. H.
I purchased the RUCS7i to attempt to save some $ on electric. After 3 solid weeks it appears the saving are there albeit minimal. According to the WWW the average savings is ~$100/year. It appears I will be getting $10-$15 / month savings. Of course this will be offset somewhat by the gas increases. Here in Florida the gas company gives rebates on changing from electric to gas...which we did, therefore expecting a $650 rebate to offset the costs. We do not expect water savings since the demand for our family will not change. Several things for me to note on the unit purchased. I like the efficiency rating, Ill get some tax break up to $300. The unit arrived damaged - mostly cosmetic dents as it looked dropped. Called Amazon and they gave me some refund. The unit works fine. Installation can be a pain due to installing the condensing vent and drain. There are no easy temperature adjustments and are varied by either setting dip switches or purchase of extra parts. There is only a single LED readout for displays....not even a power on / off switch. You just plug it in or not. I wish we could turn down the temperature. Minimum is 120 degrees. Here in FLA the ambient water temp during summer is already 75+ degrees. Not much hot water is needed to shower and adjusting for less hot water has shut off the water heater due to its minimal needed flow thus resulting in a luke warm shower which is too cold on some days. ... show more
Reviewed in the United States on June 1, 2020 by C. H. C. H.
    • No Frills, Easy Install for a DIYer
Color: White
Installed myself, installed an inline filter before the heater. Started right up after piping gas, water, and plugging into standard 110. Still running strong one year later. Hot showers for as long as you want.
Reviewed in the United States on November 5, 2020 by jeff48
    • Broken when I received it. Wouldn't help me. Just back and forth with messaging
Color: White
Review Image by Anthony G. Anthony G.
Reviewed in the United States on August 3, 2022 by Anthony G. Anthony G.
    • Must have
Color: White
Endless and on demand hot water is the way to go, i use several of the Rinnai products and they always deliver the best .
Reviewed in the United States on May 6, 2021 by Kindle Customer

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