Model
Midea MRW34B4A**
Rank #19 means 18 of the 1,000 refrigerator models we track cost less to run each year; the 37th efficiency percentile means it uses less energy for its size than 37% of those models.
What does the Midea MRW34B4A** cost to run per year?
Rank #19 of 1,000 puts the Midea MRW34B4A** at the very top of the cheapest-to-run leaderboard for its class, at roughly $27 a year. It uses 21% less energy than the U.S. federal standard model in its class, which would cost about $34/yr to run, a saving of roughly $7 a year. Efficiency-wise, once size is accounted for, it trails most of the class, ahead of only 37% of the models we track. This class has no published efficiency-factor figure beyond annual kWh itself, so at 3.3 cu ft (the class spans 1.2 to 31.7), size is the clearest lever we can point to for this model's running cost.
Immediately around it on the leaderboard, the Avallon AWC152DPRGLH at $27/yr runs a little cheaper and the Xo XOU15WGSL at $27/yr runs a little more, a sense of how tightly models are packed at this point in the ranking. A refrigerator typically stays in service for somewhere around 12 years; over that span, the Midea MRW34B4A**'s $27/yr adds up to roughly $324 in electricity alone, before purchase price or repairs.
Also sold as: Xo XOU15WGSL.
By the numbers
The Midea MRW34B4A** 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 $27/yr, here is what the Midea MRW34B4A** 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 MRW34B4A** costs about $270. That is roughly $70 less than a standard model in its class, which would run closer to $340 over the same ten years.
How the Midea MRW34B4A** compares
The refrigerator class we track runs from $8 to $149 a year. At $27/yr, it runs about $37 a year cheaper than the class median of $64, and it is about $19 a year more than the cheapest refrigerator to run at $8. Against the US federal standard model for its class at about $34/yr, the Midea MRW34B4A** uses 21% less energy.
What drives its running cost
At 3.3 cu ft, the Midea MRW34B4A** is a small refrigerator for its class, which spans 1.2 to 31.7 cu ft with a median of 12.6 cu ft, less capacity to service is usually the first reason a running-cost figure lands on the low side, before efficiency even enters the picture.
- Interior volume. More cubic feet of cold air to maintain generally means a bigger compressor and a higher running-cost figure, even among efficient models.
- Counter depth vs standard depth. Standard-depth models generally offer more interior volume per unit of width than counter-depth models, a tradeoff between built-in looks and cubic feet.
- Compressor technology. How a compressor cycles, full on/off versus a variable-speed inverter design, is one of the biggest hidden differences behind two fridges with similar cubic feet but different running costs.
- Placement and ventilation. Ventilation clearance around the back and top matters more than most owners expect; a fridge starved of airflow runs its compressor longer to hold the same temperature.
Common questions
Is the Midea MRW34B4A** cheap to run?
Yes. Its $27/yr running cost puts it at rank #19 of 1,000, below what most refrigerator models we track cost to run.
How much does the Midea MRW34B4A** cost per month?
About $2.21 a month, which is the $27 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: 143 kWh from ENERGY STAR times the US average of $0.1856/kWh comes to about $27 a year. It covers electricity only, not the purchase price, water, or installation.
How efficient is the Midea MRW34B4A** for its size?
37th 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 |
|---|---|---|
| 18 | Avallon AWC152DPRGLH3.1 cu ft | $27 |
| 17 | Fisher & Paykel RS2435SB*T*4.6 cu ft | $25 |
| 16 | Stirling S4-D250SS5.1 cu ft | $25 |
| 15 | Stirling S4-D200SS5.1 cu ft | $25 |
| 14 | Stirling S4-100SS5.3 cu ft | $25 |
Source
ES_1129046_MRW34B4A**_012720260553136_4835302View certified refrigerator listingsENERGY STAR data as of July 2026Midea and MRW34B4A** 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.