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Rinnai RL75iLP Liquid Propane Internal Whole House Liquid Propane Tankless Water Heater 7.5 Gallons Per Minute with Isolation Valves

Item #: BCI1840398
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Liquid Propane Tech Specs
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Product Details for the Rinnai RL75iLP in Liquid Propane

Luxury Collection Liquid Propane, Internal Whole House Tankless Water Heater with 7.5 GPM at 40° F Rise for Three Bathroom Home

Stop planning your mornings and evenings around your water heater. Set your own schedule, thanks to the RL75i. Ideal for two- to three-bathroom homes, the R75LSi delivers up to 7.5 gallons of hot water per minute (GPM), while saving energy and money. Mount your compact R75LSi in virtually any room, and vent directly to the outside with a single wall or roof penetration.

Qualifies For Federal Tax Credit

A tankless water heater is an energy-efficient water heating system that heats water only when it’s needed. These space-saving, long-lasting water heaters provide an endless stream of clean, hot water for all your appliances simultaneously without temperature fluctuations. And all while saving you up to 40% in energy costs!


  • Appropriate for 3 Showers and 1 Sink
  • ENERGY STAR® Qualified
  • Certified for Installation in Manufactured (Mobile) Homes
  • Commercial-grade Heat Exchanger for Residential and Commercial Applications
  • Hot Water Capacity: 0.4 to 7.5 GPM @ 40° F Rise
  • 82% Thermal Efficiency
  • Liquid Propane Fuel
  • Indoor Installation Only
  • Pre-set at 120°F
  • 98° F to 140° F Temperature Range
  • Gas Rate Input BTU's: 10,300 - 180,000
  • Electronic Ignition
  • EZConnect®(Connects Two Units Together)
  • Meets California and Texas NOx Emissions Standards
  • Compatible with Full Line of Rinnai Digital Controllers
  • GSA Approved
  • 12-Year Warranty on Heat Exchanger, 5 Year Parts, 1 Year Labor for Residential Installations
  • Includes:
    • MC-91-1 Digital Controller with Error Code Indicator
    • Isolation Valve
    • Pressure Relief Valve
    • Wall Mounting Hardware


  • Width: 14"
  • Height: 22-15/16"
  • Depth: 9-5/8"
  • Weight: 50 lbs
  • Factory Set Temperature: 120°
  • Gas Connection: 3/4"
  • Water Connection: 3/4"
Our SKU: Rinnai RL75iLP

This product is listed under the following manufacturer number(s):

*Denotes a finish or option that has been discontinued

4 Questions from the Community
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Is this suitable for heating an entire home?

That depends on the size of your home. However, 7.5 gallons is adequate for heating a home in most circumstances.

What is the minimum water temperature? Is there a way to extend the vertical rise an additional 3 inches?

The Rinnai RL75iLP has a minimum temperature of 98 degrees F. There is a telescoping vent length that should handle your vertical rise. The pipe length part number is 224054 and telescopes from 2.2 inches to 12 inches.

Will the 6"condensation collar give me 3 additional inches?

The Rinnai RL75iLP condensation collar is built into the device and is included in the product height already.

Can this water heater be installed using existing through-the-roof venting?

The Rinnai RL75iLP uses direct vent type venting. If your existing venting is a direct vent type system, assuming all other necessary conditions are met, you will be able to use your existing venting.

Click the link labeled "Owners Manual" or "Installation Guide" below the Product Details on this page for additional details regarding the installation of this product.

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