Model
Frigidaire FHWW245WE2
Rank #381 means 380 of the 404 room air conditioner models we track cost less to run each year; the 5th efficiency percentile means it uses less energy for its size than 5% of those models.
What does the Frigidaire FHWW245WE2 cost to run per year?
Do the math and the Frigidaire FHWW245WE2's $251/yr puts it at rank #381 of 404, one of the costlier room air conditioner models we track to keep running. It uses 41% less energy than the U.S. federal standard model in its class, which would cost about $426/yr to run, a saving of roughly $175 a year. Adjusted for size, it is only more efficient than 5% of room air conditioner models we track, so its headline cost is mostly a function of its capacity rather than efficiency. At a CEER of 13.3, its combined energy efficiency ratio is the single figure that best explains how it earns its running-cost number.
Immediately around it on the leaderboard, the Comfort Aire RADS-253R03 at $251/yr runs a little cheaper and the Keplerx KBRC24RSVE2 at $251/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 Frigidaire FHWW245WE2's $251/yr adds up to roughly $2510 in electricity alone, before purchase price or repairs.
Also sold as: Comfort Aire RADS-253R03.
By the numbers
The Frigidaire FHWW245WE2 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 $251/yr, here is what the Frigidaire FHWW245WE2 adds up to before purchase price, water, or repairs enter the math.
Left running for a decade at today's US average rate, the Frigidaire FHWW245WE2 costs about $2510. That is roughly $1750 less than a standard model in its class, which would run closer to $4260 over the same ten years.
How the Frigidaire FHWW245WE2 compares
The room air conditioner class we track runs from $51 to $389 a year. At $251/yr, it runs about $152 a year above the class median of $99, and it is about $200 a year more than the cheapest room air conditioner to run at $51. Against the US federal standard model for its class at about $426/yr, the Frigidaire FHWW245WE2 uses 41% less energy.
What drives its running cost
At 24000 BTU/hr, the Frigidaire FHWW245WE2 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 13.3, 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 Frigidaire FHWW245WE2 cheap to run?
Not especially. At $251 a year it ranks #381 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 Frigidaire FHWW245WE2 cost per month?
Roughly $20.93/mo, spreading the $251/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 1,353 kWh from ENERGY STAR and multiply it by the US average residential electricity rate of $0.1856/kWh, giving about $251 a year. It is an electricity-only estimate and does not include purchase price, water, or installation.
How efficient is the Frigidaire FHWW245WE2 for its size?
5th 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_1021080_FHWW245WE2_12072023101732_80189695View certified room air conditioner listingsENERGY STAR data as of July 2026Frigidaire and FHWW245WE2 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.