Model
Midea MAH09S1AGR
Rank #107 means 106 of the 404 room air conditioner models we track cost less to run each year; the 100th efficiency percentile means it uses less energy for its size than 100% of those models.
What does the Midea MAH09S1AGR cost to run per year?
At $75 a year to run, the Midea MAH09S1AGR runs cheaper than most models in its class, ranking #107 of 404 room air conditioner models we track. It uses 80% less energy than the U.S. federal standard model in its class, which would cost about $376/yr to run, a saving of roughly $301 a year. Once capacity is factored in, it outperforms 100% of the room air conditioner models we track on efficiency, near the very top of the normalized ranking. The CEER figure of 17.6 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 Midea MAH09N1AGR at $75/yr runs a little cheaper and the Midea MAH09W1AGR at $75/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 Midea MAH09S1AGR's $75/yr adds up to roughly $750 in electricity alone, before purchase price or repairs.
Also sold as: Midea MAH09B1AGR.
By the numbers
The Midea MAH09S1AGR 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 $75/yr, here is what the Midea MAH09S1AGR adds up to before purchase price, water, or repairs enter the math.
Left running for a decade at today's US average rate, the Midea MAH09S1AGR costs about $750. That is roughly $3010 less than a standard model in its class, which would run closer to $3760 over the same ten years.
How the Midea MAH09S1AGR compares
The room air conditioner class we track runs from $51 to $389 a year. At $75/yr, it runs about $24 a year cheaper than the class median of $99, and it is about $24 a year more than the cheapest room air conditioner to run at $51. Against the US federal standard model for its class at about $376/yr, the Midea MAH09S1AGR uses 80% less energy.
What drives its running cost
At 9500 BTU/hr, the Midea MAH09S1AGR is a small room air conditioner for its class, which spans 5000 to 34100 BTU/hr with a median of 10100 BTU/hr, less capacity to service is usually the first reason a running-cost figure lands on the low side, before efficiency even enters the picture. Its CEER of 17.6, above the class median of 15, reflects combined energy efficiency ratio: a higher figure means it wrings more useful work out of every kilowatt-hour, so it is the efficiency lever to weigh against raw size.
- 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 Midea MAH09S1AGR cheap to run?
Yes, relatively. At $75 a year it ranks #107 of 404 room air conditioner models we track, in the cheaper part of its class to run.
How much does the Midea MAH09S1AGR cost per month?
Roughly $6.26/mo, spreading the $75/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 405 kWh from ENERGY STAR and multiply it by the US average residential electricity rate of $0.1856/kWh, giving about $75 a year. It is an electricity-only estimate and does not include purchase price, water, or installation.
How efficient is the Midea MAH09S1AGR for its size?
100th percentile once size is factored in, a fairly typical result for the class.
Cheaper to run in the same class
| Rank | Model | Cost/yr |
|---|---|---|
| 109 | Midea MAH09N1AGR9500 BTU/hr | $75 |
| 108 | Midea MAH09H1AGR9500 BTU/hr | $75 |
| 107 | Midea MAH09B1AGR9500 BTU/hr | $75 |
| 106 | Zokop TIWC-08CRD18000 BTU/hr | $74 |
| 105 | Windmill 08W2Wi8000 BTU/hr | $74 |
Source
ES_1138537_MAH09S1AGR_04032025111848_80249678View certified room air conditioner listingsENERGY STAR data as of July 2026Midea and MAH09S1AGR 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.