Waykar; KESNOS; YAUFEY; Fehom YDZ-120: running cost
The Waykar; KESNOS; YAUFEY; Fehom YDZ-120 is certified by ENERGY STAR at 382 kWh a year, about average for its category to run among dehumidifiers currently certified.
That $72 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
The category average is 378 kWh/yr; this model runs 1.1% above it, ranking 336 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 $1/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 YDZ-120: Waykar; KESNOS; YAUFEY; Fehom YDY-120 ($72/yr, 382 kWh/yr), then BLACK+DECKER BDM36WCDA ($72/yr, 383 kWh/yr).
Same brand, different models
Ranked 10 of Waykar; KESNOS; YAUFEY; Fehom's 16 certified dehumidifiers, this sits between the YDA-80 ($53/yr, the brand's cheapest) and the YDW-150PM ($98/yr, its priciest).
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.
Shopping for a new one
Efficient as certified dehumidifiers go, $72/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
A dehumidifier like the Waykar; KESNOS; YAUFEY; Fehom YDZ-120 is a real household expense whether or not it needs replacing yet; a protection plan is one way to budget for a repair rather than a full replacement.
Where this number comes from
At rank 336 of 546 for running cost, see the dehumidifier category page for the rest of the field, or the guide to how much your state matters. The 382 kWh/yr figure is ENERGY STAR's own certification, not a wattage estimate; exact dataset IDs are on the data sources page.