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Rinnai RUCS75iP Tankless Hot Water Heater, 7.5 GPM, Propane, Indoor Installation

4.3 4.3 out of 5 stars 224 ratings

$547.99
Only 1 left in stock - order soon.
Propane, Indoor Installation
7.5 GPM
Brand Rinnai
Product Dimensions 33"W x 37"H
Color White
Wattage 15000 watts
Voltage 120 Volts
Capacity
7.5 Gallons
Power Source
Gas Powered
Material
Polyvinyl Chloride
Item Weight
57.3 Pounds

About this item

  • 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

From the brand


From the manufacturer

Rinnai
tankless heater

constant hot water

Never run out of hot water again

With Rinnai, hot water is always available to you, no matter how much or how often you need it

lasts twice as long

Smarter, more durable than a tank

Rinnai tankless water heaters last up to twice as long, and save energy-heating water only when needed

rinnai

The Rinnai difference

Individually tested for quality before shipping, Rinnai makes the vast majority of our key components, unlike our competitors, allowing for better, more consistent quality

energy efficient

Enjoy energy saving benefits

Rated by a Uniform Energy Factor (UEF), our tankless water heaters are highly energy efficient, saving you from expensive power and water costs

super high efficiency

Super high efficiency

Super high-efficiency models offer sleek design, maximum output, and an array of features ideal for the hot water demands of large homes

space saving design

Saves valuable space

Our suitcase-sized compact wall units fit neatly in, freeing up more usable areas in your home

rinnai RINNAI B010Q1XD1U rinnai rinnai rinnai
RE-Models REP-Models RUCS-Models RU-Models RSC Models CU-Models
Customer Reviews
4.4 out of 5 stars
45
4.3 out of 5 stars
9
4.3 out of 5 stars
224
4.8 out of 5 stars
17
4.2 out of 5 stars
68
4.0 out of 5 stars
51
Price $725.13 $950.63
Energy Star Qualified X X X
Available in Natural Gas or Propane
Indoor and outdoor versions available Indoor Only
Quick Access Isolation X X
GPM's-Gallons Per Minute 2.7-7.6 GPM 3.1-7.6 GPM 6.5-7.5 GPM 7-11 GPM 9-11 GPM 9-11 GPM
# of Fixtures Supported 2 to 6 2 to 6 2 to 6 2 to 7 2 to 7 3 to 7
Built-in Recirculation Pump X X X X
WiFi Capable (Module Sold Separately) X
Learns Hot Water Usage Patterns for Convenience and Energy Savings X X X X

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Product information

Technical Details

Additional Information

Warranty & Support

Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.
Specification Sheet click here [PDF ] Product Warranty: For warranty information about this product, please click here. [PDF ]

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Rinnai RUCS75iP Tankless Hot Water Heater, 7.5 GPM, Propane, Indoor Installation


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Product 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.

Top Brand: Rinnai

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10K+ customers rate items from this brand highly
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Rinnai RUCS75iP Tankless Hot Water Heater, 7.5 GPM, Propane, Indoor Installation
Rinnai RUCS75iP Tankless Hot Water Heater, 7.5 GPM, Propane, Indoor Installation
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Price$547.99$549.00-10% $814.59
List:$905.10
$813.81$804.00$299.99
Delivery
Get it as soon as Friday, Jan 17
Get it Jan 16 - 17
Get it as soon as Friday, Jan 17
Get it Friday, Jan 17
Get it as soon as Friday, Jan 17
Customer Ratings
Sold By
capacity
power source
mounting type
material
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Important information

Wattage

15000 watts

Bulb Voltage

120 volts

Customer reviews

4.3 out of 5 stars
224 global ratings

Review this product

Share your thoughts with other customers

Customers say

Customers find that the water heater functions well and is easy to install. They appreciate its reliable hot water supply, easy installation for DIYers, and good value for money. Many customers like its efficiency and space-saving design. However, some have issues with the water temperature and differing opinions on temperature adjustment.

AI-generated from the text of customer reviews

26 customers mention "Functionality"26 positive0 negative

Customers are satisfied with the water heater's functionality. They say it works well, has no leaks or problems, and is a quality unit.

"I'm very happy that I switched to a tankless. This Rinnai water heater is amazing...." Read more

"...Called Amazon and they gave me some refund. The unit works fine...." Read more

"...While it worked adequately for 18 months, not as well as the lower priced Rheem, but acceptable, the fact that I am still paying for it on my..." Read more

"...Not too difficult for DIY. No leaks, no problems. It fired up + has worked flawlessly! It provides hot water as quickly + steadily as our tank WH...." Read more

21 customers mention "Ease of installation"16 positive5 negative

Customers find the water heater easy to install. The directions are straightforward and organized well. They mention it's a contractor grade unit with proper clearances and maintenance.

"This is a contractor grade unit, no frills or options. I replaced a tank style unit with this model and I can't tell the difference...." Read more

"...(First week of operation) The Installation manual is organized well and has the info needed to guide a proper installation...." Read more

"...Keep in mind however that the unit was perfectly installed and maintained, and still had rubber gaskets in place in the bottom where the wires exit..." Read more

"...The unit works fine. Installation can be a pain due to installing the condensing vent and drain...." Read more

19 customers mention "Water supply"19 positive0 negative

Customers appreciate the water supply. They say it provides hot water when needed, takes long showers without warming up, and heats water quickly. The unit is efficient with its heat transfer and leaves little heat behind, making it an excellent hot water heater. It has multiple temperature settings, but temperature control is better with an optional temperature setting.

"...It provides hot water when I need it. You must purchase a valve kit to install this unit. It must be back flushed just like a coffee maker...." Read more

"...I was impressed with the amount of condensation that drained out during operation. This unit is so efficient with its heat transfer...." Read more

"...It's capable of putting out enough heat...." Read more

"...Mine 100lb tank. - excellent on demand hit water. - low temp exhaust- just use a pvc pipe with thermal tape. -..." Read more

9 customers mention "Value for money"9 positive0 negative

Customers find the water heater offers good value for money. It's quiet, takes up less space, and may save money in the long run. Many consider it simple and inexpensive to install, with no need for special exhaust.

"...This Rinnai unit is a very good value in my opinion. Priced at the lower end, while having impressive features when compared with other..." Read more

"...from a regular water tank to a tankless but in my opinion it's well worth it. It did have one little glitch when it was first installed...." Read more

"Amazing change from tanked electric. I have used all kinds of water heaters including tankless electric...." Read more

"...intake- pvc with a screen to prevent debris- very simple and cheap.- no need for special exhaust and intake plumbing fixtures...." Read more

4 customers mention "Efficiency"4 positive0 negative

Customers like the water heater's efficiency. They say it's highly recommended based on its efficiency and is about half the price.

"...I like the efficiency rating, Ill get some tax break up to $300. The unit arrived damaged - mostly cosmetic dents as it looked dropped...." Read more

"...This unit is so efficient that 95% plus of the BTUs are used in the water heating process, this then leaves little heat which creates condensate...." Read more

"...This unit comes highly recommended based on efficiency and is about half the price of comparable units. Comes with a 12 year warranty." Read more

"Wonderful and Efficent..." Read more

4 customers mention "Space saving"4 positive0 negative

Customers appreciate the water heater's space-saving design. They say it's smaller than a microwave and never runs out of hot water.

"...Saves space and I don't have to heat water when I'm not home anymore" Read more

"...We have much more room in the crawl space now. I learned a bit too late that this unit is not approved for Use above 5,500 feet altitude...." Read more

"Pros: Endless hot water, takes up less space, possible money savings in the long term..." Read more

"Complained to the one I replaced malery this unit is big and heavy installed easy and we were able to change the dip switches..." Read more

10 customers mention "Temperature adjustment"4 positive6 negative

Customers have different views on the water heater's temperature adjustment. Some find it has multiple settings and automatically adjusts the heat input to match the water flow rate. Others say they are unable to adjust temperatures, and the minimum temperature is 120 degrees.

"...There are no easy temperature adjustments and are varied by either setting dip switches or purchase of extra parts...." Read more

"This is a contractor grade unit, no frills or options. I replaced a tank style unit with this model and I can't tell the difference...." Read more

"...Another annoyance was the fact that you can't adjust the temperature lower than 120 F. I called customer service and was told to install a mixer..." Read more

"...Once heat is being applied, the unit will automatically adjust the heat input to match the water flow rate such that output temperature is..." Read more

7 customers mention "Water temperature"0 positive7 negative

Customers are unhappy with the water temperature. It no longer gets hot, even with the taps wide open for 20 minutes. The water shuts off after about 3 minutes of hot water and is absolutely freezing cold when it shuts off. Some customers have reported an error code 12 which is a flame failure, and a small explosion inside that burned up all its wiring and likely ruined the control.

"...It kept shutting off after about 3 minutes of hot water and when it shuts off it is absolutely freezing cold...." Read more

"...Well, last month the unit had a small explosion inside that burned up all its wiring and likely ruined the control board...." Read more

"...I have is on occasion I'll turn the faucet on at hot and I'll not get hot water unless I turn off the water faucet and then turn it back on to max..." Read more

"...no longer got hot at all...even with the taps wide open for 20 minutes...." Read more

Hot water on demand of course
4 out of 5 stars
Hot water on demand of course
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.
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Top reviews from the United States

  • Reviewed in the United States on October 19, 2024
    Style: Natural Gas, Indoor InstallationSize: 7.5 GPMVerified Purchase
    This is a contractor grade unit, no frills or options. I replaced a tank style unit with this model and I can't tell the difference. It provides hot water when I need it. You must purchase a valve kit to install this unit. It must be back flushed just like a coffee maker. It is very quiet. This unit is a condensing type unit so it collects moisture that must be drained. The base unit does not have a control panel. The temperature is set by dip switches. A control panel add on is available. No wifi function on this model. I would purchase this again.
    2 people found this helpful
    Report
  • Reviewed in the United States on July 6, 2023
    Style: Natural Gas, Indoor InstallationSize: 6.5 GPMVerified Purchase
    Technology in these tankless units is so advanced from what was available 20 years ago. Impressive.

    I am a DIY home owner. Was faced with a leaking tank style water heater and found that power-vent style tank heaters were becoming difficult and expensive to buy. Seems like the on-demand heaters was the way to go. This Rinnai unit is a very good value in my opinion. Priced at the lower end, while having impressive features when compared with other manufacturers.
    My caution to others is to be prepared for expensive installation costs. Plumbing and exhaust changes in my home added up to over $200 in parts plus significant labor to do things right. This is not a fault of this particular unit. It is simply a general reality when converting from a tank style heater to one of these tankless units.
    I highly recommend buying the recommended valve kit for about $50. I did not buy the kit and was out over $100 with brass hardware to perform the same level of isolation and service connections.

    Review of the RUCS65iN model: Very pleased with its performance so far. (First week of operation) The Installation manual is organized well and has the info needed to guide a proper installation. It took me a bit to understand rules and restrictions for the exhaust / combustion piping, but the manual did help me get there. Make sure you have sufficient flow at your faucet to get past the minimum flow required before heat kicks in. Once heat is being applied, the unit will automatically adjust the heat input to match the water flow rate such that output temperature is precisely 120 degress F. (Can select higher temps with dip switches.) I was impressed with the amount of condensation that drained out during operation. This unit is so efficient with its heat transfer. PVC pipe works great for exhaust and barely warms up during long operation.
    7 people found this helpful
    Report
  • Reviewed in the United States on December 29, 2024
    Style: Natural Gas, Indoor InstallationSize: 6.5 GPMVerified Purchase
    I'm very happy that I switched to a tankless. This Rinnai water heater is amazing. Be prepared for about $600 in parts to switch from a regular water tank to a tankless but in my opinion it's well worth it. It did have one little glitch when it was first installed. It kept shutting off after about 3 minutes of hot water and when it shuts off it is absolutely freezing cold. However once we figured out that the drainage line was sitting too low in the pump everything worked great. Very very happy with this product!
  • Reviewed in the United States on June 1, 2020
    Style: Natural Gas, Indoor InstallationSize: 7.5 GPMVerified Purchase
    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.
    Customer image
    4.0 out of 5 stars Hot water on demand of course
    Reviewed in the United States on June 1, 2020
    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.
    Images in this review
    Customer image
    Customer image
    4 people found this helpful
    Report