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Internet #306655610

Model #RUCS75iN

Store SKU #1003546092

Super High Efficiency 7.5 GPM Residential 160,000 BTU Natural Gas Interior Tankless Water Heater

$107160
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$undefined.00 /mo* suggested payments with months* financingApply Now
  • Enjoy endless hot water
  • Less space for heating gives you more space for living
  • Professional installation recommended; please call 833-746-6210
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Product Overview

Welcome to ultimate efficiency. With technology that operates only when hot water is needed, super-efficient heating coils, no pilot light and no storage tank to heat and reheat water, you save on energy and utility costs. In fact, Rinnai Tankless Water Heaters use up to 40% less energy than a traditional tank water heater. Plus, with premium technology, increased energy efficiency, an improved Home Energy Rating System (HERS) Index Score and optimized LEED eligibility, our tankless solutions can increase your home's value. You can even qualify for energy efficiency rebates and tax credits. It's a smart investment for now and the future.
  • ENERGY STAR qualified with an energy factor of 0.93 / Uniform Energy Factor of 0.9
  • Save time with hot water whenever and wherever you need it, any size home, even for simultaneous uses at multiple fixtures
  • Save energy and reduce utility costs by operating only when hot water is needed
  • Maximum output, minimum space; suitable for installation in non-traditional spaces such as crawl spaces and attics
  • Multiple venting options available including PVC/CPVC using the Ubbink concentric to twin pipe adaptor allow for an easy installation
  • Automatic frost protection
  • Residential warranty: limited 12-year on heat exchanger, 5-year on parts, 1-year on labor (5-year optional on labor); commercial warranty: limited 5-year on heat exchanger, 5-year on parts, 1-year on labor (2-year optional on labor)
  • Rinnai is changing the language in its warranty terms and conditions found in the current User Installation manuals; The existing statement will be replaced by the following: "This Limited Warranty applies only to products that are installed in the United States and Canada. Improper installation may void this Limited Warranty; It is recommended that a trained and qualified professional who has attended a Rinnai installation training class complete your installation" All warranties (old or new manual) will be honored as written above
  • You can be confident in choosing to install Rinnai tankless technology in your home; our commitment to quality has made us the #1 selling tankless water heating brand in North America; your family deserves nothing less
  • Professional installation recommended; please call 833-746-6210
  • Rinnai branded accessories will ensure optimal performance of your Rinnai Tankless Water Heater.






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BrandRinnaiRinnaiRheemRinnai
NameSuper High Efficiency 6.5 GPM Residential 130,000 BTU Natural Gas Interior Tankless Water HeaterSuper High Efficiency 7.5 GPM Residential 160,000 BTU Natural Gas Interior Tankless Water HeaterPerformance Platinum 9.5 GPM Natural Gas High Efficiency Indoor Tankless Water HeaterSuper High Efficiency Plus 9 GPM Residential 160,000 BTU Natural Gas Interior Tankless Water Heater
Price
$92820
$107160
$134900
$146325
Ratings
(83)
(241)
(405)
(344)
Indoor/OutdoorIndoorIndoorIndoorIndoor
Gas TypeNatural GasNatural GasNatural GasNatural Gas
Number of Showers1-21-32-41-3
Application TypeResidentialResidentialResidentialResidential
Flow Rate @ 45°F Rise (gallons/min)5.36.78.56.8
Efficiency LevelHighHighSuper HighSuper High
Water Heater FeaturesFreeze Protection,Wall Mounted,WiFiFreeze Protection,Wall Mounted,WiFiUltra LoNox,Wall MountedFreeze Protection,Wall Mounted,WiFi
Fuel TypeGasGasGasGas
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Specifications

Dimensions

Product Depth (in.)
10 in
Product Height (in.)
26 in
Product Width (in.)
18.5 in
Vent diameter (in.)
5
Water Connection Size (in.)
.75

Details

Application Type
Residential
BTU Rating
160000
Commercial/Residential
Residential
Efficiency Level
High
Finish Family
White
Flow Rate @ 35°F Rise (gallons/min)
7.5 gal (US)/min
Flow Rate @ 45°F Rise (gallons/min)
6.7
Flow Rate @ 55°F Rise (gallons/min)
5.3
Flow Rate @ 65°F Rise (gallons/min)
4.5
Fuel Type
Gas
Gas Connection Size
.75
Gas Type
Natural Gas
Heat Exchanger Warranty
12 Year
Indoor/Outdoor
Indoor
Maximum Temperature (F)
185
Minimum Activation Rate (gpm)
.4
Minimum Temperature (F)
98 °F
Number of Showers
1-3
Pack Size
1
Product Weight (lb.)
70 lb
Required Volt Connection
120 volt
Returnable
90-Day
Total BTU
160000
Uniform Energy Factor
0.9
Vent Type
Single Wall
Water Heater Features
Freeze Protection,Wall Mounted,WiFi
Wattage (watts)
89

Warranty / Certifications

Certifications and Listings
CSA Listed
Labor Warranty
1 Year
Part Warranty
5 Year

Questions & Answers

Typical questions asked about products:

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Customer Reviews

  • 4.4
    out of 241 reviews
  • 85% recommend this product
Filter by:
Showing 1-30 of 241 reviews
This unit is amazing! The HD price was hard to beat anywhere, and even the installer was impress...
This unit is amazing! The HD price was hard to beat anywhere, and even the installer was impressed. I went with this unit as the low end of the Top of the Line RUCS condensing units. The Rinnai quality is amazing and with a certified installer I found the replacement of the boiler to be the single best home improvement I've done. Hot water does take 30 secs to 1 minute to show at the faucet depending on where in the house I need it, but once it starts flowing there is nothing quite like it! The Rinnai unit is attic mounted and I hear no mechanism noise and haven't seen any undesirable side effects. This 7.5 unit can run both showers and the kitchen sink and my HE washing machine a the same time. I literally cat imagine going back to a tank heater now, and its only been installed for a week. If you have natural gas already heating your water this is the ONLY way to go. And with the special pricing it will show a much earlier return on investment for me!
by
  • Verified Purchase
  • Recommended
13 people found this helpful
Great product
Very Economical .Saving a lot of water heating charges unnecessarily esp during long vacation times
by
    Good Performance so far
    The water warms pretty well but not beyond tolerance. I had this product for 4 months now and like it's performance.
    by
      Efficient Unit
      Water is hot within 30 seconds, however, sometimes have to reset unit to have it heat water
      by
        Constant hot water!
        Although it takes awhile for our hot water to reach the showers and faucets, once there, we can count on an unending supply.
        by
          So far, so good
          Really enjoy hot water on demand. No more heating 40+ gallons of water just to have it sit there and do nothing. Less utility cost as well.
          by
            Tankless water heater review
            It came with our house and has worked perfectly. We have had no issues. Hot water when you need it. Too bad we don't have little ones near every faucet, it still takes time for hot water to get to some faucets that are far from it, but that's not the water heater's problem
            by
              Space saving, energy saving and reliable product.
              Energy saving is standing out the most. Like it when you don't have to wait for hot water, dislike when no hot water with low water flow. I have it for 6 mos. Yes, it meet my expectations.
              by
                Rinnai Review
                Positives are not having a hot water heater, ability to take showers and run appliances like dishwashers and wagers at the same time without running out of hot water and great warranty period. On the negative side, it takes a long time to get hot water; kitchen sink, one bathroom sink and shower. A lot of wasted water.
                by
                  Rating provided by a verified purchaser...
                  Rating provided by a verified purchaser
                  by
                  • Verified Purchase
                  Can’t use just a little hot water. Water heater only...
                  Can’t use just a little hot water. Water heater only comes on with faucet wide open.
                  by
                  • Verified Purchase
                  Do not buy this if you residence elevation is over 5400 feet above sea level.
                  Do not buy this if you residence elevation is over 5400 feet above sea level.
                  by
                    Having problems finding someone to work on this wa
                    Has a broken heat exchanger .Used it from August tooDecember and heat exchanger broke,
                    by
                      While cheaper model comes with connection valves, this MORE expensive model does NOT!
                      While cheaper model comes with connection valves, this MORE expensive model does NOT!
                      by
                      • Verified Purchase
                      Waste of Water
                      I am very disappointed in the RINNAI system for several reasons: 1) VERY slow to heat up, 2) water does not get hot in all areas of the house, 3) the 'hot' water is NOT consistent....the heater keeps turning off while I am trying to get hot water.
                      by
                        Works reasonably well
                        I like that when it works, it works extremely well. However, the flow rate requirement, in my opinion, is far too high. My kitchen sink has trouble hitting the mark reliably and my bathroom sinks both need to be on in order to get it to fire up.
                        by
                          The limited control range (120-140) was mentioned no where. Former...
                          The limited control range (120-140) was mentioned no where. Former Rinnai model allowed lower set points (108 was used). This was a huge disappointment
                          by
                          • Verified Purchase
                          Be sure and read the checklist. So you don't miss something simple. Product works great takes a b...
                          Be sure and read the checklist. So you don't miss something simple. Product works great takes a bit to get warm in futherest bathroom but stays hot once its there.
                          by
                          • Verified Purchase
                          • Recommended
                          Figuring out he venting and the sizing for the gas line was a bit of a challenge as we were repla...
                          Figuring out he venting and the sizing for the gas line was a bit of a challenge as we were replacing an old tankless heater. I works MUCH better than the old one for sure. I wish we would not waited so long to make the upgrade. It uses MUCH less water to start the heater and even less to keep it going. The only issue is out dog does not appreciate the sound it makes...but she is getting used to it!
                          by
                          • Verified Purchase
                          • Recommended
                          Nice water heater.
                          This is my first tankless water heater so I have no experience with other products. This water came with our new home and seems to work well so far,
                          by
                            Great Product
                            I have had a Rinnai Hot water heater in my old house and in my new one. Very cost efficient and you never run out of hot water. The only draw back is that it takes over a minute (sometimes 2 minutes) to get hot water out of the faucet, even when you insulate the pipes.
                            by
                              disappointed with constantly running out of hot wa
                              new construction, 2months in house, have run out of hot water several times
                              by
                                Great product
                                Water heats up pretty quickly and hot water lasts a long time! The only thing you need to be aware of is keeping the drain line clear; it can freeze up causing the hot water to turn off (so it doesn't overflow inside the unit), and then it's super chilly! I didn't realize what was happening the first few times, but it's a super easy fix once I knew what was going on (knock the ice out of the drain line and/or open the release valve located under the unit).
                                by
                                  All the hot water you need
                                  It is nice to know I can have all the hot water I need without it getting cold. The only issue is that it takes a long time to actually get hot water flowing.
                                  by
                                    Tankless is better
                                    Fairly quiet but water does take a bit longer to get really hot
                                    by
                                      Rating provided by a verified purchaser...
                                      Rating provided by a verified purchaser
                                      by
                                      • Verified Purchase
                                      New user
                                      As a new user of only 3 months, I am very satisfied with the unit. It is space saving and it supplies plenty of volume. One thing to be aware of is the altitude setting. We had a very bad experience with the flame not igniting unless you had the faucet wide open........so no hot water. Once we read the manual and saw the altitude section and set the dip switch to the high altitude setting, it worked perfectly. We are only at 2300 feet, but that is apparently high altitude to this unit.
                                      by
                                        Highly Recommended product
                                        Energy savings with on demand water heating, saves space with compact size, continuous hot water..
                                        by
                                          2633 Via Romana
                                          Have had it approx 4 months. It is small, out of the way, noiseless,and instant hot water
                                          by
                                            Overall, quite happy
                                            This unit puts out hot water quickly. Installation was easy, and everything worked as advertised. The main issue that I had was with the condensate neutralizer. It took a few days to get it in just the right position so that it wouldn't cause a backup error and stop putting out hot water without a reset. I eventually got it dialed in, but it was frustrating at first.
                                            by
                                              Showing 1-30 of 241 reviews