Model
Gree GJC08BU-A6DRNJ2A
Rank #47 means 46 of the 404 room air conditioner models we track cost less to run each year; the 86th efficiency percentile means it uses less energy for its size than 86% of those models.
What does the Gree GJC08BU-A6DRNJ2A cost to run per year?
At $72 a year to run, the Gree GJC08BU-A6DRNJ2A is among the cheapest room air conditioner models we track, ranking #47 of 404. It uses 47% less energy than the U.S. federal standard model in its class, which would cost about $136/yr to run, a saving of roughly $64 a year. Once capacity is factored in, it outperforms 86% of the room air conditioner models we track on efficiency, not just on headline running cost. At a CEER of 16, 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 Midea MWFUQB-8CRFN8-BCN11 at $72/yr runs a little cheaper and the House Kobo KOBOGJC08BU at $73/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 Gree GJC08BU-A6DRNJ2A's $72/yr adds up to roughly $720 in electricity alone, before purchase price or repairs.
By the numbers
The Gree GJC08BU-A6DRNJ2A 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 $72/yr, here is what the Gree GJC08BU-A6DRNJ2A adds up to before purchase price, water, or repairs enter the math.
Left running for a decade at today's US average rate, the Gree GJC08BU-A6DRNJ2A costs about $720. That is roughly $640 less than a standard model in its class, which would run closer to $1360 over the same ten years.
How the Gree GJC08BU-A6DRNJ2A compares
The room air conditioner class we track runs from $51 to $389 a year. At $72/yr, it runs about $27 a year cheaper than the class median of $99, and it is about $21 a year more than the cheapest room air conditioner to run at $51. Against the US federal standard model for its class at about $136/yr, the Gree GJC08BU-A6DRNJ2A uses 47% less energy.
What drives its running cost
At 8300 BTU/hr, the Gree GJC08BU-A6DRNJ2A is a small room air conditioner for its class, which spans 5000 to 34100 BTU/hr with a median of 10100 BTU/hr, and smaller room air conditioner models generally cost less to run for the same job, all else being equal. Beyond size, its CEER of 16, 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 Gree GJC08BU-A6DRNJ2A cheap to run?
Yes, relatively. At $72 a year it ranks #47 of 404 room air conditioner models we track, in the cheaper part of its class to run.
How much does the Gree GJC08BU-A6DRNJ2A cost per month?
Roughly $6.02/mo, spreading the $72/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 389 kWh from ENERGY STAR and multiply it by the US average residential electricity rate of $0.1856/kWh, giving about $72 a year. It is an electricity-only estimate and does not include purchase price, water, or installation.
How efficient is the Gree GJC08BU-A6DRNJ2A for its size?
86th percentile once size is factored in. That means its size-adjusted efficiency is a real factor in the running-cost figure above; its capacity plays a large role too.
Cheaper to run in the same class
| Rank | Model | Cost/yr |
|---|---|---|
| 46 | Midea MWFUQB-8CRFN8-BCN117800 BTU/hr | $72 |
| 45 | Midea MAW08V1KYWT-S7800 BTU/hr | $72 |
| 44 | Midea MAW08V1KWT-A7800 BTU/hr | $72 |
| 43 | Lg LW8022IVSM8000 BTU/hr | $72 |
| 42 | K�Hl KCVS08B10B8700 BTU/hr | $71 |
Source
ES_1105164_GJC08BU-A6DRNJ2A_12092024163219_80232913View certified room air conditioner listingsENERGY STAR data as of July 2026Gree and GJC08BU-A6DRNJ2A 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.