Rinnai RL75iN Tankless Water Heater Review

Rinnai RL75iN

Pros

  • Reliable, continuous hot water for up to 4 fixtures
  • Easy temperature control ranging from 120-140-degrees
  • Small wall-mounting unit that can fit anywhere in the home
  • 12-year manufacturer warranty on heat exchanger, 5-year warranty overall
  • Protective water shut-off and anti-frost capabilities• Approved for installation in mobile and manufactured homes

Cons

  • Will need yearly vinegar flushing to remove hard water deposits (if applicable)
  • Expensive if the home does not need 7.5 gallons per minute
  • Will need to reset the temperature control if temporarily adjusted

High Performance, High Capacity for the Busy Household

Though you need hot water for cooking meals, washing yourself and cleaning your home, some water heaters are better than others.

Tankless models do not have the large tank that other models do and let you save money on heating costs. Water moves over heated coils to reach the temperature that you desire.

The EcoSmart ECO 36 36kw 240V Electric is one of the excellent tankless water heaters we’ve seen. It can help you save significantly on your water heating bills and also save on the space that your old product used.

Detailed Review and Breakdown

Features

The RL75iN is a natural gas tankless water heater that constantly heats the supply of water as it passes through the unit’s heat exchanger. As the model name implies, you can rely on it to provide up to 7.5 gallons of hot water per minute. That rate of water delivery is adequate to run four fixtures at one time: two showers, a dishwasher, and a laundry machine (or the equivalent thereof).

The Rinnai RL75iN will come at a pre-set temperature control of 120-degrees. You can save on your natural gas bill by lowering the output to 98-degrees, or if you’re running a long plumbing line or need to fill a hot tub, you can raise the temperature up to 140-degrees.

If there is a problem in your water line, the Rinnai RL75iN’s leak detection feature will automatically close the valve to the water supply, helping to prevent further damage and flooding. It also has a built-in thermometer to detect the ambient temperature. If the environment gets too cold, it will activate its anti-frost protection, running at low energy to prevent the water currently in the unit from freezing and bursting the pipe.

Though not included, it is important to note that the RL75iN is compatible for recirculation. With an added recirculation pump, the water heater will continuously reheat the same water flowing through your pipes so that you’ll have hot water the moment you turn on a faucet or open a valve.

Specs

  • Weight: 50 pounds
  • Width: 14 inches
  • Height: 23 inches
  • Depth: 9.3 inches
  • Color: Silver
  • Voltage: 120
  • Gas Type: Natural Gas
  • Gas Line Fitting: .5 inches

The RL75iN tankless water heater fits comfortably on your wall and runs easily on the same amount of voltage as a regular light switch or power outlet.

Ease of Use & Reliability

The RL75iN’s user interface is simple to operate, and if there is a problem with the unit, its error indicator lightswill help you diagnose and troubleshoot the issue. You can expect this unit to last 20 years or more, and Rinnai covers the heat exchanger with a no-cost warranty for 12 years (5 years for all other parts).

With such easy operation and long life expectancy, the RL75iN is a nearly hassle-free investment for your home.

Because it is so small and taps into your existing plumbing and electrical lines, you can easily install the Rinnai RL75iN tankless water heater in almost any room of your house. Place it in a central location between the bathrooms, kitchen, and laundry room to ensure fast hot water delivery to your showers, appliances, and faucets.

Note that adjusting the temperature control will raise or lower the output of all of your fixtures. You can change the temperature setting as often as you like, but remember to reset it when you’re finished with your Jacuzzi spa time and want to turn on the faucet to do the dishes. 140 will feel pretty hot when you’re not expecting it.

Cost

The RL75iN is a high capacity tankless water heater that it is compatible for recirculation. It is competitively priced at less than $1200. You will most likely need additional parts for installation (~$180) or professional installation services (~$1200) to complete the task.

Any Other Criteria?

You will need to install and connect the RL75iN. Doing so will require cutting into your drywall and roof, performing electrical, plumbing, and gas line maintenance, and then finishing the project with flanges and roof sealer, patching and repainting your wall. You can purchase the valve and termination kits to make your job a little easier.

If you’re not comfortable performing the installation yourself, however, you will need to hire a professional. 

Attempting to install a tankless water heater without the proper tools or training can be dangerous and can cause damage both to your home and the water heater.

Is This Tankless Water Heater For You?

Rinnai RL75iN

Heating 7.5 gallons per minute, the Rinnai RL75iN is sufficient for families of 5-6 or those who need a large amount of hot water at peak times.

If you have a large home, install the water heater in a central location between bathrooms and the kitchen to minimize wait time for hot water delivery.

Our Opinion

The Rinnai RL75iN does jump in price compared to lower capacity models, but that extra gallon of water per minute does make a difference. Five hundred dollars spread out over 20 years is a negligible amount to pay for the convenience of supplying your whole family with hot water.

This model rarely fails or needs maintenance, especially if you soften your water. You can also add a recirculation pump to the system for immediate hot water.

Overall, we’re impressed with the Rinnai RL75iN and would recommend it to any family with the need for an increased hot water supply.

Other Options Worth Looking At

The Rinnai RL75iN does jump in price compared to lower capacity models, but that extra gallon of water per minute does make a difference. Five hundred dollars spread out over 20 years is a negligible amount to pay for the convenience of supplying your whole family with hot water.

This model rarely fails or needs maintenance, especially if you soften your water. You can also add a recirculation pump to the system for immediate hot water.

Overall, we’re impressed with the Rinnai RL75iN and would recommend it to any family with the need for an increased hot water supply.