Ruud PROUH40 T0 RU120-M Running Cost (Electric Water Heater)
Running cost for the Ruud PROUH40 T0 RU120-M
At 780 kWh/yr, the Ruud PROUH40 T0 RU120-M's ENERGY STAR certification puts it one of the cheaper models in its category to run against every other certified electric water heater.
That $147 is priced at 18.8¢/kWh, the average of all 51 state rates this site tracks. Your own state's rate is one click away.
Efficient, or not, for a electric water heater
Against the category average of 1,105 kWh/yr, this model uses 29.4% less, ranking 17 of 596 electric water heaters tracked here for running cost. That average is drawn from all 596 electric water heaters ENERGY STAR currently certifies, not an outside number, a $61/year gap from this model at the national rate. Full sourcing is in the sourcing notes.
Right next to it on the list
A rank or two either side of the Ruud PROUH40 T0 RU120-M: Richmond 10E40-HP120MS ($147/yr, 780 kWh/yr), then Ruud PROUH40 T0 RU120-MSO ($147/yr, 780 kWh/yr).
Same brand, different models
Ranked 2 of Ruud's 51 certified electric water heaters, this sits between the PROUH40 T2 CD400-15 ($121/yr, the brand's cheapest) and the PROUH80 T0 RU120-MSO ($264/yr, 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 Ruud PROUH40 T0 RU120-M that long and it costs about $1,613 in electricity, on top of whatever it cost to buy.
Shopping for a new one
Efficient as certified electric water heaters go, $147/year is a reasonable baseline if you're comparing what else is on the market.
Compare current ENERGY STAR certified electric water heaters before buying.
If you're keeping it
The Ruud PROUH40 T0 RU120-M already costs $147/year to run; a repair bill on top of that is the kind of expense a protection plan exists to smooth out.
Where this number comes from
Nothing here is estimated from a nameplate wattage; the 780 kWh/yr is ENERGY STAR's own certified figure for this model. The full Electric Water Heater category page shows all 596 electric water heaters ranked by cost; the state-rate guide covers the half of this number that isn't the appliance.