Model
Lg LW8024IVSM
Rank #119 means 118 of the 404 room air conditioner models we track cost less to run each year; the 70th efficiency percentile means it uses less energy for its size than 70% of those models.
What does the Lg LW8024IVSM cost to run per year?
The Lg LW8024IVSM is a relatively cheap runner for its class: about $79 a year, rank #119 of 404. It uses 38% less energy than the U.S. federal standard model in its class, which would cost about $127/yr to run, a saving of roughly $48 a year. Once capacity is factored in, its 70th efficiency percentile puts it ahead of most peers in its class. Its CEER of 15 reflects combined energy efficiency ratio, one of the class's core efficiency levers.
Immediately around it on the leaderboard, the Gradient CCHP11 at $77/yr runs a little cheaper and the Midea MAT08R1FWTK at $79/yr runs a little more, a sense of how tightly models are packed at this point in the ranking. A room air conditioner typically stays in service for somewhere around 10 years; over that span, the Lg LW8024IVSM's $79/yr adds up to roughly $790 in electricity alone, before purchase price or repairs.
By the numbers
The Lg LW8024IVSM normalized against its whole class, so each figure means something.
What it costs you over time
Running cost is an every-year number, so it compounds. At $79/yr, here is what the Lg LW8024IVSM adds up to before purchase price, water, or repairs enter the math.
Left running for a decade at today's US average rate, the Lg LW8024IVSM costs about $790. That is roughly $480 less than a standard model in its class, which would run closer to $1270 over the same ten years.
How the Lg LW8024IVSM compares
The room air conditioner class we track runs from $51 to $389 a year. At $79/yr, it runs about $20 a year cheaper than the class median of $99, and it is about $28 a year more than the cheapest room air conditioner to run at $51. Against the US federal standard model for its class at about $127/yr, the Lg LW8024IVSM uses 38% less energy.
What drives its running cost
At 8500 BTU/hr, the Lg LW8024IVSM is a small room air conditioner for its class, which spans 5000 to 34100 BTU/hr with a median of 10100 BTU/hr, at the small end of the class, capacity itself is doing a lot of the work to keep that figure down, separate from how efficient the unit actually is. Beyond size, its CEER of 15, above the class median of 15, is the class's own efficiency yardstick, combined energy efficiency ratio, and it is what separates two similarly sized models with different running costs.
- Combined Energy Efficiency Ratio (CEER). CEER captures cooling output per watt, including standby power; a higher CEER means less electricity for the same BTU of cooling.
- BTU cooling capacity. A higher-BTU unit is sized for a bigger room and generally uses more electricity per hour of operation than a smaller unit, regardless of efficiency.
- Thermostat and mode usage. Running on a fixed low temperature around the clock uses far more energy than using a thermostat setting, eco mode, or a timer to match cooling to when the room is actually occupied.
Common questions
Is the Lg LW8024IVSM cheap to run?
Yes, relatively. At $79 a year it ranks #119 of 404 room air conditioner models we track, in the cheaper part of its class to run.
How much does the Lg LW8024IVSM cost per month?
Roughly $6.57/mo, spreading the $79/yr estimate evenly across twelve months at $0.1856/kWh. Actual monthly bills swing with your rate and usage pattern.
How is this running-cost figure calculated?
We take the model's published annual energy use of 425 kWh from ENERGY STAR and multiply it by the US average residential electricity rate of $0.1856/kWh, giving about $79 a year. It is an electricity-only estimate and does not include purchase price, water, or installation.
How efficient is the Lg LW8024IVSM for its size?
70th percentile once size is factored in, a fairly typical result for the class.
Cheaper to run in the same class
Source
ES_1118034_LW8024IVSM_11202023125113_80190902View certified room air conditioner listingsENERGY STAR data as of July 2026Lg and LW8024IVSM are used here for identification only and are not endorsements. Figures are computed by WattWise Labs from public ENERGY STAR data, not measured in our own lab.