Rheem PROPH40 T0 RH120-MSO Running Cost (Electric Water…
What the Rheem PROPH40 T0 RH120-MSO costs to run
At 780 kWh/yr, the Rheem PROPH40 T0 RH120-MSO's ENERGY STAR certification puts it one of the cheaper models in its category to run against every other certified electric water heater.
The $147 figure above uses the simple average of all 51 published state rates. Pick your state for the real number.
Rheem PROPH40 T0 RH120-MSO against the category
That's 29.4% below the electric water heater category average of 1,105 kWh/yr, and ranks 12 of 596 certified electric water heaters for annual running cost, 1 being cheapest. The category average comes from every electric water heater ENERGY STAR currently certifies (596 models), not an outside benchmark, about $61/year below that average at the national rate. See the methodology page.
What sits beside it in the ranking
Rheem XE40T10HM00U0 ($147/yr, 780 kWh/yr) costs a little more to run than the Rheem PROPH40 T0 RH120-MSO. Rheem PROPH40 T0 RH120-M ($147/yr, 780 kWh/yr) costs a little less.
Comparing Rheem's own models
Rheem makes 77 ENERGY STAR certified electric water heaters; this one ranks 2 of 77 for running cost, between the brand's cheapest, the PROPH40 T0 RH120-M at $147/yr, and its priciest, the XE80T10HMS00U0 at $264/yr.
What this adds up to over time
NAHB's Study of Life Expectancy of Home Components puts a typical electric water heater's service life at 11 years; run the Rheem PROPH40 T0 RH120-MSO that long and it costs about $1,613 in electricity, on top of whatever it cost to buy.
Weighing a replacement
The Rheem PROPH40 T0 RH120-MSO is already efficient for its category at $147/year. If you're shopping and comparing options, this is roughly what a well-chosen new electric water heater costs to run.
Compare current ENERGY STAR certified electric water heaters before buying.
Protecting what you have
$147/year to run is the predictable cost of the Rheem PROPH40 T0 RH120-MSO; a protection plan covers the unpredictable one, a repair bill.
Sourcing
Nothing here is estimated from a nameplate wattage; the 780 kWh/yr is ENERGY STAR's own certified figure for this model. Ranked 12 of 596, the Rheem PROPH40 T0 RH120-MSO 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.