WattCost

Data through April 2026

Running cost · Room Air Conditioners · ENERGY STAR certified

DELLA 048-TL-W10KI

The DELLA 048-TL-W10KI is certified at 500 kWh per year (based on 750 standardized hours), roughly $94 at the national average — though seasonal use means your real bill lands in a few months, not twelve. Efficiency-wise it's unremarkable in a good way: within 6% of the median certified room air conditioner (rank 144 of 396). Where you live moves the bill from $62 a year in North Dakota to $233 in Hawaii.

Estimated annual running cost · U.S. average rate 18.8¢/kWh

$94/yr

$52 · cheapest certified room air conditioners$395 · priciest
Per month
$7.85
Per day
26¢
Certified use
500 kWh/yr
Cooling capacity
10,000 BTU/hr
CEER
15
Mounting
Does Not Straddle Window or Windowsill
Variable-speed compressor
Yes
274 kWh2,096 kWh
Where the DELLA 048-TL-W10KI (▮) sits among all 396 certified room air conditioners, by annual kWh

What it costs in every state

DELLA 048-TL-W10KI: 500 kWh/yr × each state's average residential rate (EIA)
StateRate ¢/kWhThis model $/yrRelative cost
Alabama17.4¢$87
Alaska27.4¢$137
Arizona15.5¢$77
Arkansas14.2¢$71
California35.3¢$176
Colorado16.5¢$83
Connecticut32.2¢$161
Delaware18.8¢$94
District of Columbia25.4¢$127
Florida15.4¢$77
Georgia15.4¢$77
Hawaiipriciest46.6¢$233
Idaho12.7¢$64
Illinois20.5¢$102
Indiana17.9¢$90
Iowa13.9¢$69
Kansas15.8¢$79
Kentucky15.0¢$75
Louisiana14.4¢$72
Maine28.4¢$142
Maryland22.1¢$110
Massachusetts29.4¢$147
Michigan21.4¢$107
Minnesota16.4¢$82
Mississippi16.8¢$84
Missouri14.0¢$70
Montana13.9¢$70
Nebraska13.3¢$66
Nevada14.3¢$71
New Hampshire27.2¢$136
New Jersey23.5¢$118
New Mexico15.2¢$76
New York29.4¢$147
North Carolina16.3¢$81
North Dakotacheapest12.3¢$62
Ohio19.5¢$97
Oklahoma13.3¢$67
Oregon15.8¢$79
Pennsylvania21.5¢$107
Rhode Island28.3¢$142
South Carolina17.1¢$85
South Dakota14.5¢$73
Tennessee14.9¢$75
Texas17.0¢$85
Utah13.3¢$66
Vermont24.6¢$123
Virginia17.4¢$87
Washington14.4¢$72
West Virginia16.1¢$80
Wisconsin19.2¢$96
Wyoming14.7¢$73

Certified models closest in efficiency

room air conditioners within reach of 500 kWh/yr
ModelkWh/yr$/yr (US avg)
BLACK+DECKER BD10NWES500$94
Century RXTS-101A500$94
Comfort Aire RXTS-101A500$94
Danby DAC100B8IWDB-6500$94
ELEMENT EHWR10BE500$94
Friedrich CCV10A10A500$94

Run your own numbers

Your rate, your numbers

Per day
26¢
Per month
$7.85
Per year
$94

500 kWh/yr × 18.8¢/kWh = $94/yr

Prefilled with this model's certified 500 kWh/yr — adjust if your usage differs from the DOE test basis. The certified annual kWh assumes 750 cooling hours per year (the DOE standard). In hot climates real usage can run well above that; in mild ones, below.

Certified variants covered by this entry

048-TL-W10KI · 048-TL-W10KI

Questions, answered with the data

How much electricity does the DELLA 048-TL-W10KI use?
ENERGY STAR certifies the DELLA 048-TL-W10KI at 500 kWh per year. The certified annual kWh assumes 750 cooling hours per year (the DOE standard). In hot climates real usage can run well above that; in mild ones, below.
How much does the DELLA 048-TL-W10KI cost to run per month?
About $7.85 a month at the U.S. average residential rate (18.8¢/kWh) — 26¢ a day, or $94 a year. Your state's rate moves this up or down; see the table above.
Is the DELLA 048-TL-W10KI energy efficient?
It uses 6% less electricity than the median certified room air conditioner.
What does the DELLA 048-TL-W10KI cost to run in the cheapest vs. priciest state?
At current residential rates it costs about $62 a year in North Dakota (12.3¢/kWh) and $233 in Hawaii (46.6¢/kWh).
Does this figure cover other model numbers?
Yes — 2 certified retail variants (color, finish, and store-specific SKUs) share this exact energy certification. They're listed under "Certified variants" on this page.

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