Rinnai V53De

Last updated: October 31, 2026

Rinnai V53De
2.7/5#19 of 20 in gas tankless water heaters
2.7

A low cost outdoor heater from a major brand for a small home, cabin or condo in a mild climate.

  • 120,000 BTU/hHeating power
  • 5.3 GPMMax flow
  • 0.81UEF
  • 10 yearsHeat exchanger warranty
Check price at Amazon$741.65Check price at Amazon$741.65

Price checked October 31, 2026. As an Amazon Associate we earn from qualifying purchases.

Pros
  • The cheapest Rinnai outdoor model, light enough at 30 lb for an easy wall mount
  • No vent pipe needed
  • Covers two fixtures at once for a small home or cabin
Cons
  • 120,000 BTU/h struggles with two showers in winter in cold regions
  • Shorter heat exchanger warranty than Rinnai’s RE series
  • A 0.81 UEF uses more gas than a condensing heater

How it scores

The rating comes from 4 measured or published factors, each scored 0-100 against fixed reference points for its fuel. How we rank explains each one.

Specifications

Model numberREU-AM1620WD-US
Heating
FuelGas
Gas typeNatural gas or propane
Gas input15,500 to 120,000 BTU/h
Max flow5.3 GPM
UEF0.81
CondensingNo
ENERGY STARNo
Installation
VentingOutdoor
Weight29.7 lb
Features
Built-in recirculationNo
Wi-FiNo
Heat exchanger warranty10 years
Parts warranty5 years

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