Appliances / Window air conditioners / DELLA
DELLA 048-TL-W10KI
10,000 BTU · Window room air conditioner
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About the DELLA 048-TL-W10KI
The DELLA 048-TL-W10KI is a 10,000 BTU window room air conditioner certified by ENERGY STAR. Its official test figure is 500 kWh of electricity a year, which at the U.S. average price of 18.19¢ per kWh comes to $91 a year, or $910 over a typical 10-year life.
That is 38% less energy than the federal maximum for this type of air conditioner (806 kWh a year), a saving of about $56 a year compared with a model that only just meets the standard.
Among 492 window models it ranks #215 for running cost. The cheapest model of this type would save $437 in electricity over 10 years, though it may differ in size and features.
If you want the same type and a similar size for less to run, the K�hl KCVS08B10B uses 384 kWh a year and would save about $211 over 10 years.
Cost to run where you live
500 kWh a year (ENERGY STAR test figure) × 18.19¢ per kWh, the average residential price in the U.S. for Jan–Aug 2026 (EIA). Your bill depends on your utility and how you use it.
Cheaper to run, same type and size
Or see every medium rooms (8,000 to 10,000 btu) model ranked.
| K�hl KCVS08B10B | 8700 BTU | $70/yr | saves $211 |
| Midea MAH09B1AGR | 9500 BTU | $74/yr | saves $173 |
| Midea MAH09H1AGR | 9500 BTU | $74/yr | saves $173 |
| Midea MAH09N1AGR | 9500 BTU | $74/yr | saves $173 |
Specs
| Brand | DELLA |
| Model | 048-TL-W10KI |
| Type | Window |
| Energy use | 500 kWh / year |
| Federal maximum for this type | 806 kWh / year |
| Size | 10,000 BTU |
| Width | 20.7 in |
| Efficiency (CEER) | 15 |
| Mounting | Does Not Straddle Window or Windowsill |
| Voltage | 115 V |
| Inverter (variable speed) | Yes |
| Heat mode | No |
| Refrigerant | R-32 |
| Height | 13.4 in |
| Depth | 19.3 in |
| Weight | 57.8 lb |
Specs and energy use from the ENERGY STAR certified products list (U.S. EPA). An asterisk in a model number stands for colour or finish codes. HouseholdLeak is not affiliated with ENERGY STAR or the EPA.
Questions people ask
How much does the DELLA 048-TL-W10KI cost to run?
About $91 a year at the U.S. average electricity price (18.19¢/kWh), based on its ENERGY STAR rating of 500 kWh a year. In a state with expensive power it can be much more; pick your state on this page to see your number.
How much will the DELLA 048-TL-W10KI cost in electricity over its life?
About $910 over 10 years, a typical life for a room air conditioner. Add that to the price you pay to get the true cost to own.
Is the DELLA 048-TL-W10KI energy efficient?
Yes. It is ENERGY STAR certified and uses 38% less energy than the federal maximum for its type.
Is there a cheaper air conditioner to run of the same type and size?
Yes. The K�hl KCVS08B10B uses 384 kWh a year, about $211 less in electricity over 10 years.
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