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    Rinnai Tankless Water Heater Reviews

    Tankless Geek currently reviews 6 Rinnai models. Each review separates our editorial score from Amazon customer ratings and links the source documents used for specifications, installation and warranty details.

    Specifications verified on the date shown in each review. Product availability and documents can change.

    Rinnai RU180eP
    PREMIUM
    Premium

    Rinnai RU180eP

    4.4

    Outdoor condensing propane tankless from Rinnai's SENSEI line — 180,000 BTU/h and up to 10.0 GPM at ~0.95 UEF. High-flow whole-home hot water for propane households, with no indoor venting required and a 15-year heat-exchanger warranty.

    Amazon customer rating as of the last specification review. Not the Tankless Geek editorial score.

    Flow Rate:10.0 GPM
    Energy Type:Propane
    Installation:Outdoor
    Best For:Large propane homes, High simultaneous demand (multiple showers), Installs favoring outdoor mounting over indoor venting
    $900
    Rinnai RE140iN
    PREMIUM
    Premium

    Rinnai RE140iN

    4.4

    Compact indoor non-condensing natural-gas tankless heater rated at 140,000 BTU/h and 5.3 GPM max — a value-priced entry into Rinnai's ecosystem for small-to-medium homes, backed by a 15-year heat-exchanger warranty.

    Amazon customer rating as of the last specification review. Not the Tankless Geek editorial score.

    Flow Rate:5.3 GPM
    Energy Type:Natural Gas
    Installation:Indoor
    Best For:Small to medium homes, 2–3 bathrooms, up to ~2 simultaneous fixtures, Mild-to-moderate climates
    $999
    Rinnai V65iN
    MID-RANGE
    Mid-Range

    Rinnai V65iN

    4.5

    Indoor, non-condensing natural-gas tankless from Rinnai's Value series — 150,000 BTU/h and 6.5 GPM at 0.80 UEF. A long-proven, budget-friendly indoor gas unit for small-to-medium homes, high-altitude approved.

    Amazon customer rating as of the last specification review. Not the Tankless Geek editorial score.

    Flow Rate:6.5 GPM
    Energy Type:Natural Gas
    Installation:Indoor
    Best For:Small-to-medium homes, Moderate climates, up to ~2 simultaneous fixtures, High-altitude installations
    $827
    Rinnai RU160iN
    PREMIUM
    Premium

    Rinnai RU160iN

    4.4

    Indoor condensing natural-gas tankless from Rinnai's SENSEI Super High Efficiency Plus line — 160,000 BTU/h and up to 9.0 GPM at ~0.92 UEF, a whole-home condensing unit for 3–4 bath homes with a 15-year heat-exchanger warranty.

    Amazon customer rating as of the last specification review. Not the Tankless Geek editorial score.

    Flow Rate:9.0 GPM
    Energy Type:Natural Gas
    Installation:Indoor
    Best For:3–4 bathroom homes, Whole-home use with multiple simultaneous fixtures, Owners prioritizing efficiency and lower gas bills
    $1,172
    Rinnai V53DeN
    PREMIUM
    Premium

    Rinnai V53DeN

    4.4

    Outdoor, non-condensing natural-gas tankless from Rinnai's Value series — 120,000 BTU/h and 5.3 GPM at 0.81 UEF. The most affordable way into Rinnai for a small warm-climate home, with exterior mounting that removes indoor venting.

    Amazon customer rating as of the last specification review. Not the Tankless Geek editorial score.

    Flow Rate:5.3 GPM
    Energy Type:Natural Gas
    Installation:Outdoor
    Best For:Small homes, cabins, and ADUs, Warm-to-mild climates, Budget installs favoring outdoor mounting
    $799
    Rinnai V53DeP
    PREMIUM
    Premium

    Rinnai V53DeP

    4.4

    Outdoor, non-condensing propane tankless from Rinnai's Value series — 120,000 BTU/h and 5.3 GPM at ~0.82 UEF. A low-cost endless-hot-water option for small or seasonal propane homes, mounted outdoors with no indoor venting.

    Amazon customer rating as of the last specification review. Not the Tankless Geek editorial score.

    Flow Rate:5.3 GPM
    Energy Type:Propane
    Installation:Outdoor
    Best For:Cabins, rural homes, and ADUs on propane, Warm-to-mild climates, Light, single-fixture hot-water demand
    $899

    How to compare Rinnai models

    Compare usable flow at your required temperature rise, energy input, installation requirements, efficiency, service access and written warranty. A maximum GPM value without its test conditions is not enough to size a system.

    Sizing guideDownload the specification dataset