Rinnai REHP50 Running Cost (Electric Water Heater)
Running cost for the Rinnai REHP50
The Rinnai REHP50 is certified by ENERGY STAR at 844 kWh a year, cheaper than most models in its category to run among electric water heaters currently certified.
The $159 figure above uses the simple average of all 51 published state rates. Pick your state for the real number.
Where this ranks
That's 23.6% below the electric water heater category average of 1,105 kWh/yr, and ranks 33 of 596 certified electric water heaters for annual running cost, 1 being cheapest. Every one of the 596 currently-certified electric water heaters feeds that average, putting this model about $49/year under it. See how it's calculated on the how it is calculated page.
The closest alternatives by cost
Sorted by running cost among electric water heaters, one step cheaper is Navien NWP500S050AUMB ($158/yr, 840 kWh/yr), and one step pricier is Rinnai REHP50BM ($159/yr, 844 kWh/yr).
Same brand, different models
Rinnai sells 15 certified electric water heaters; this one runs cheapest of them, $74/year under the REHP65C, its priciest.
Cost over its typical lifespan
NAHB's Study of Life Expectancy of Home Components puts a typical electric water heater's service life at 11 years; run the Rinnai REHP50 that long and it costs about $1,745 in electricity, on top of whatever it cost to buy.
Shopping for a new one
The Rinnai REHP50 is already efficient for its category at $159/year. If you're shopping and comparing options, this is roughly what a well-chosen new electric water heater costs to run.
Worth comparing a few current certified models before deciding.
Protecting what you have
$159/year to run is the predictable cost of the Rinnai REHP50; a protection plan covers the unpredictable one, a repair bill.
The data behind this page
Ranked 33 of 596, the Rinnai REHP50 sits in the middle of the electric water heater category, see the guide to why your state changes this number for the other half of the math. The 844 kWh/yr figure is ENERGY STAR's own certification, not a wattage estimate; exact dataset IDs are on the data sources page.