Model
Lg LW1522IVSM
Rank #336 means 335 of the 404 room air conditioner models we track cost less to run each year; the 19th efficiency percentile means it uses less energy for its size than 19% of those models.
What does the Lg LW1522IVSM cost to run per year?
Not many room air conditioner models we track cost more to run than the Lg LW1522IVSM: about $133 a year, rank #336 of 404. It uses 37% less energy than the U.S. federal standard model in its class, which would cost about $210/yr to run, a saving of roughly $77 a year. Adjusted for size, it is only more efficient than 19% of room air conditioner models we track, so its headline cost is mostly a function of its capacity rather than efficiency. The CEER figure of 14.7 on this model captures combined energy efficiency ratio, the main efficiency lever ENERGY STAR tracks for this class.
Immediately around it on the leaderboard, the Lg LW1522FVSM at $133/yr runs a little cheaper and the K�Hl KCVS16B30B at $134/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 LW1522IVSM's $133/yr adds up to roughly $1330 in electricity alone, before purchase price or repairs.
Also sold as: Lg LW1522FVSM.
By the numbers
The Lg LW1522IVSM 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 $133/yr, here is what the Lg LW1522IVSM 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 LW1522IVSM costs about $1330. That is roughly $770 less than a standard model in its class, which would run closer to $2100 over the same ten years.
How the Lg LW1522IVSM compares
The room air conditioner class we track runs from $51 to $389 a year. At $133/yr, it runs about $34 a year above the class median of $99, and it is about $82 a year more than the cheapest room air conditioner to run at $51. Against the US federal standard model for its class at about $210/yr, the Lg LW1522IVSM uses 37% less energy.
What drives its running cost
At 14000 BTU/hr, the Lg LW1522IVSM is a large room air conditioner for its class, which spans 5000 to 34100 BTU/hr with a median of 10100 BTU/hr, among room air conditioner models, bigger capacity is the most common reason a running-cost figure lands on the high side, all else being equal. Beyond size, its CEER of 14.7, below 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 LW1522IVSM cheap to run?
Not especially. At $133 a year it ranks #336 of 404 room air conditioner models we track, in the pricier part of its class to run, though its size and features may still justify that for your needs.
How much does the Lg LW1522IVSM cost per month?
Roughly $11.05/mo, spreading the $133/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 714 kWh from ENERGY STAR and multiply it by the US average residential electricity rate of $0.1856/kWh, giving about $133 a year. It is an electricity-only estimate and does not include purchase price, water, or installation.
How efficient is the Lg LW1522IVSM for its size?
19th percentile once size is factored in. That means its size-adjusted efficiency is not the main reason for the running-cost figure above; its capacity plays a large role too.
Cheaper to run in the same class
Source
ES_1118034_LW1522IVSM_092620230506611_6980335View certified room air conditioner listingsENERGY STAR data as of July 2026Lg and LW1522IVSM 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.