Customize Your Rinnai RL75I Tankless Water Heater Series

Customizing a product with us is simple and flexible. Following these steps, you can easily customize a product to meet your needs.

1. Choose a base product model.
2. Explore available options.
3. Select choices to view the total price.
4. Add the customized product to the cart and checkout.

Status: In Stock

Termination Kit

Rinnai Water Heater Roof Discharge Termination 38" (US$178.00)
Rinnai Water Heater Termination Kit 11.5" (US$139.00)
Rinnai Water Heater Termination Kit 21" (US$147.00)
Rinnai Water Heater Termination Diverter Kit 21" (US$147.00)
Extension Pipe

Rinnai Water Heater Extension Vent Pipe 10" (US$50.00)
Rinnai Water Heater Extension Vent Pipe 19.5" (US$86.99)
Rinnai Water Heater Extension Vent Pipe 39" (US$112.99)
Main Item Price US$ 1,422.05
Optional Item Price US$ 0.00
Price for this Configuration US$ 1,422.05



Introducing the RL Series Tankless Water Heaters by Rinnai is the perfect solution for indoor hot water needs. Say goodbye to the hassle of bulky tanks and hello to endless hot water on demand. Enjoy an endless supply of hot water with this high-efficiency non-condensing gas tankless water heater.

The RL Series is designed with efficiency and durability in mind, featuring a compact and space-saving design that delivers hot water at a constant, reliable flow rate. With its sleek and modern design, it's sure to blend in seamlessly with any home decor.

The RL Series is available in multiple sizes to fit any household and simultaneously delivers hot water for up to five plumbing and appliance outlets. Its advanced technology allows for precise temperature control, ensuring you get the perfect temperature every time.

Installation is a breeze, and maintenance is minimal with the RL Series. It's equipped with a self-diagnostic system, making troubleshooting and servicing simple and easy.

Not only will the RL Series save you space and time, but it will also save you money. Its energy-efficient design helps reduce energy costs and conserve water, making it an eco-friendly choice for your home.

Upgrade your indoor hot water system with the RL Series Tankless Water Heaters by Rinnai, and experience the convenience and comfort of endless hot water on demand.



  • ENERGY STAR Qualified
  • Energy Factor of .82 for Natural Gas and Propane
  • Certified for Installation in Manufactured (Mobile) Homes
  • Enhanced scale detection lessens possibility of serious, long-term damage to unit
  • Temperature lock function prevents accidental or unauthorized changes to water temperature
  • Complies with South Coast Air Quality Management District 14 ng/J or 20 ppm NOx emission levels
  • Wi-Fi Ready
  • Available in Natural Gas or Propane
  • Isolation Valves Included
  • Smart Home Automation



Width: 14"
Height: 23"
Depth: 9.3"
Weight: 46 lbs.
Ignition: Direct Electronic
Hot Water Capacity: 0.26 to 7.5 GPM
Minimum Activation Rate: 0.4 GPM
Minimum/Maximum Gas Rate (Input BTUs ): 10,300 - 180,000
Energy Factor: 0.82 for Natural Gas and Propane
Energy Star: Yes
Approved Gas Types: Natural Gas or Propane
Temperature Settings: 98°F - 140°F with MC-91-2US
Temperature Settings: 98° F - 160° F with MCC-91-2US
Ultra Low NOx Yes
Electrical: AC 120 Volts, 60 Hz
Gas Supply: 3/4 Inch MNPT
Cold Water Inlet:

3/4 Inch MNPT

Hot Water Outlet: 3/4 Inch MNPT




To top