Model
House Kobo KOBOGJC08BU
Rank #48 means 47 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 House Kobo KOBOGJC08BU cost to run per year?
The House Kobo KOBOGJC08BU holds rank #48 of 404 on running cost, at about $73 a year, a genuinely cheap result for the class. It uses 42% less energy than the U.S. federal standard model in its class, which would cost about $125/yr to run, a saving of roughly $52 a year. Its size-adjusted efficiency percentile of 86 sits well above the class median, a clearly above-average efficiency result. At a CEER of 15.5, 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 Gree GJC08BU-A6DRNJ2A at $72/yr runs a little cheaper and the Midea MAW08HV1KWT-A at $74/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 House Kobo KOBOGJC08BU's $73/yr adds up to roughly $730 in electricity alone, before purchase price or repairs.
By the numbers
The House Kobo KOBOGJC08BU 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 $73/yr, here is what the House Kobo KOBOGJC08BU adds up to before purchase price, water, or repairs enter the math.
Left running for a decade at today's US average rate, the House Kobo KOBOGJC08BU costs about $730. That is roughly $520 less than a standard model in its class, which would run closer to $1250 over the same ten years.
How the House Kobo KOBOGJC08BU compares
The room air conditioner class we track runs from $51 to $389 a year. At $73/yr, it runs about $26 a year cheaper than the class median of $99, and it is about $22 a year more than the cheapest room air conditioner to run at $51. Against the US federal standard model for its class at about $125/yr, the House Kobo KOBOGJC08BU uses 42% less energy.
What drives its running cost
At 8100 BTU/hr, the House Kobo KOBOGJC08BU 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. The CEER of 15.5 on this model, above the class median of 15, measures combined energy efficiency ratio; it is the number to compare directly against another model's CEER if capacity is similar.
- Combined Energy Efficiency Ratio (CEER). Two units with the same BTU rating can post very different running costs, and CEER is the figure that explains most of that gap.
- BTU cooling capacity. BTU rating scales with room size, and it is usually the first driver of an air conditioner's running cost, ahead of its CEER figure.
- Thermostat and mode usage. How the unit is actually operated, thermostat cycling versus a fixed setting, moves real electricity use more than the rated BTU or CEER figure alone.
Common questions
Is the House Kobo KOBOGJC08BU cheap to run?
Yes. Its $73/yr running cost puts it at rank #48 of 404, below what most room air conditioner models we track cost to run.
How much does the House Kobo KOBOGJC08BU cost per month?
About $6.06 a month, which is the $73 annual estimate spread across twelve months at the US average rate of $0.1856/kWh. Your own bill scales with your local electricity rate and how heavily you use it.
How is this running-cost figure calculated?
The formula is annual kWh times price per kWh: 392 kWh from ENERGY STAR times the US average of $0.1856/kWh comes to about $73 a year. It covers electricity only, not the purchase price, water, or installation.
How efficient is the House Kobo KOBOGJC08BU 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 |
|---|---|---|
| 47 | Gree GJC08BU-A6DRNJ2A8300 BTU/hr | $72 |
| 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 |
Source
ES_1150317_KOBOGJC08BU_08202025122250_80262526View certified room air conditioner listingsENERGY STAR data as of July 2026House Kobo and KOBOGJC08BU 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.