Waykar; KESNOS; YAUFEY; Fehom YDA-80: running cost
At 282 kWh/yr, the Waykar; KESNOS; YAUFEY; Fehom YDA-80's ENERGY STAR certification puts it one of the cheaper models in its category to run against every other certified dehumidifier.
That $53 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 dehumidifier
Against the category average of 378 kWh/yr, this model uses 25.4% less, ranking 154 of 546 dehumidifiers tracked here for running cost. That average is drawn from all 546 dehumidifiers ENERGY STAR currently certifies, not an outside number, a $18/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 Waykar; KESNOS; YAUFEY; Fehom YDA-80: LEVOIT LDH-H251S-WUS ($53/yr, 281 kWh/yr), then Waykar; KESNOS; YAUFEY; Fehom YDG-80 ($53/yr, 282 kWh/yr).
Comparing Waykar; KESNOS; YAUFEY; Fehom's own models
Of the 16 ENERGY STAR certified dehumidifiers Waykar; KESNOS; YAUFEY; Fehom makes, the YDA-80 is the cheapest to run, $45/year less than Waykar; KESNOS; YAUFEY; Fehom's priciest, the YDW-150PM.
Lifespan
NAHB's Study of Life Expectancy of Home Components does not publish a figure for dehumidifiers, so no lifetime cost is shown here rather than a guessed one. The annual and monthly figures above stand on their own.
Weighing a replacement
Efficient as certified dehumidifiers go, $53/year is a reasonable baseline if you're comparing what else is on the market.
Compare current ENERGY STAR certified dehumidifiers before buying.
If you're keeping it
The Waykar; KESNOS; YAUFEY; Fehom YDA-80 already costs $53/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
Two sourced numbers, nothing modeled: ENERGY STAR's certified kWh/yr for this exact model, and EIA's published state electricity rate. Ranked 154 of 546, the Waykar; KESNOS; YAUFEY; Fehom YDA-80 sits in the middle of the dehumidifier category, see the guide to why your state changes this number for the other half of the math.