Model
Midea MAT14R2SWTK
Rank #340 means 339 of the 404 room air conditioner models we track cost less to run each year; the 18th efficiency percentile means it uses less energy for its size than 18% of those models.
What does the Midea MAT14R2SWTK cost to run per year?
Rank #340 of 404 puts the Midea MAT14R2SWTK among the pricier room air conditioner models we track to keep running, at roughly $140 a year. It uses 49% less energy than the U.S. federal standard model in its class, which would cost about $275/yr to run, a saving of roughly $135 a year. Its size-adjusted efficiency percentile of 18 means the low running cost, where it exists, is driven almost entirely by capacity rather than efficiency. At a CEER of 13.9, 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 MAT14R2FWTK at $140/yr runs a little cheaper and the Midea MWEUTW-14CRFN8-MCM9 at $140/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 MAT14R2SWTK's $140/yr adds up to roughly $1400 in electricity alone, before purchase price or repairs.
Also sold as: Midea MAT14R2FWTK.
By the numbers
The Midea MAT14R2SWTK 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 $140/yr, here is what the Midea MAT14R2SWTK 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 MAT14R2SWTK costs about $1400. That is roughly $1350 less than a standard model in its class, which would run closer to $2750 over the same ten years.
How the Midea MAT14R2SWTK compares
The room air conditioner class we track runs from $51 to $389 a year. At $140/yr, it runs about $41 a year above the class median of $99, and it is about $89 a year more than the cheapest room air conditioner to run at $51. Against the US federal standard model for its class at about $275/yr, the Midea MAT14R2SWTK uses 49% less energy.
What drives its running cost
At 14000 BTU/hr, the Midea MAT14R2SWTK is a large room air conditioner for its class, which spans 5000 to 34100 BTU/hr with a median of 10100 BTU/hr, and larger room air conditioner models generally cost more to run than smaller ones in the same class, simply because there is more to keep cold, spin, heat, or light. Its CEER of 13.9, below 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). 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 Midea MAT14R2SWTK cheap to run?
Its $140/yr running cost, rank #340 of 404, is above what most room air conditioner models we track cost to run, so this is not one of the cheaper picks on electricity alone.
How much does the Midea MAT14R2SWTK cost per month?
About $11.68 a month, which is the $140 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: 755 kWh from ENERGY STAR times the US average of $0.1856/kWh comes to about $140 a year. It covers electricity only, not the purchase price, water, or installation.
How efficient is the Midea MAT14R2SWTK for its size?
18th 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
| Rank | Model | Cost/yr |
|---|---|---|
| 340 | Midea MAT14R2FWTK14000 BTU/hr | $140 |
| 339 | Friedrich WCVT12B30A13600 BTU/hr | $136 |
| 338 | K�Hl KCVS16B30B15400 BTU/hr | $134 |
| 337 | Lg LW1522IVSM14000 BTU/hr | $133 |
| 336 | Lg LW1522FVSM14000 BTU/hr | $133 |
Source
ES_1138537_MAT14R2SWTK_06192026111311_80299303View certified room air conditioner listingsENERGY STAR data as of July 2026Midea and MAT14R2SWTK 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.