Ruud PROUH40 T2 CD400-15 Running Cost (Electric Water…
Running cost for the Ruud PROUH40 T2 CD400-15
ENERGY STAR certifies the Ruud PROUH40 T2 CD400-15 at 643 kWh/yr, one of the cheaper models in its category to run for its category.
That $121 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 41.8% less, ranking 2 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 $87/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 T2 CD400-15: Richmond 10CE40-HP5U15 ($121/yr, 643 kWh/yr), then Eco-Logical OMNI-50HP1-1A ($128/yr, 681 kWh/yr).
Comparing Ruud's own models
Of the 51 ENERGY STAR certified electric water heaters Ruud makes, the PROUH40 T2 CD400-15 is the cheapest to run, $143/year less than Ruud's priciest, the PROUH80 T0 RU120-MSO.
What this adds up to over time
Over the 11-year service life NAHB reports for this category, running the Ruud PROUH40 T2 CD400-15 costs roughly $1,330 in electricity, separate from the purchase price.
Shopping for a new one
Efficient as certified electric water heaters go, $121/year is a reasonable baseline if you're comparing what else is on the market.
Worth comparing a few current certified models before deciding.
If you're keeping it
At $121/year just to run, a electric water heater is worth protecting against an unplanned repair bill on top of that.
Where this number comes from
Two sourced numbers, nothing modeled: ENERGY STAR's certified kWh/yr for this exact model, and EIA's published state electricity rate. The Ruud PROUH40 T2 CD400-15 is among the cheapest 596 electric water heaters tracked here to run, see the full Electric Water Heater category page for the rest of the range. How much of that ranking is rate rather than appliance is in the guide to why your state changes this number.