Model
Omnimax 3730-937
Rank #105 means 104 of the 1,000 refrigerator models we track cost less to run each year; the 98th efficiency percentile means it uses less energy for its size than 98% of those models.
What does the Omnimax 3730-937 cost to run per year?
The Omnimax 3730-937 holds rank #105 of 1,000 on running cost, at about $39 a year, a genuinely cheap result for the class. It uses 29% less energy than the U.S. federal standard model in its class, which would cost about $55/yr to run, a saving of roughly $16 a year. Few refrigerator models we track are more efficient for their size than this one; its size-adjusted efficiency percentile of 98 is near the top of the class. This class has no published efficiency-factor figure beyond annual kWh itself, so at 13.8 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 Midea HS-507FWEN at $39/yr runs a little cheaper and the Emerson CR0026*** at $40/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 Omnimax 3730-937's $39/yr adds up to roughly $468 in electricity alone, before purchase price or repairs.
Also sold as: Ellipse EFVC14W.
By the numbers
The Omnimax 3730-937 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 $39/yr, here is what the Omnimax 3730-937 adds up to before purchase price, water, or repairs enter the math.
Left running for a decade at today's US average rate, the Omnimax 3730-937 costs about $390. That is roughly $160 less than a standard model in its class, which would run closer to $550 over the same ten years.
How the Omnimax 3730-937 compares
The refrigerator class we track runs from $8 to $149 a year. At $39/yr, it runs about $25 a year cheaper than the class median of $64, and it is about $31 a year more than the cheapest refrigerator to run at $8. Against the US federal standard model for its class at about $55/yr, the Omnimax 3730-937 uses 29% less energy.
What drives its running cost
At 13.8 cu ft, the Omnimax 3730-937 is a mid-size refrigerator for its class, which spans 1.2 to 31.7 cu ft with a median of 12.6 cu ft, putting it squarely in the middle of the class on the size lever that drives most of the cost.
- 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 Omnimax 3730-937 cheap to run?
Yes. Its $39/yr running cost puts it at rank #105 of 1,000, below what most refrigerator models we track cost to run.
How much does the Omnimax 3730-937 cost per month?
About $3.26 a month, which is the $39 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: 211 kWh from ENERGY STAR times the US average of $0.1856/kWh comes to about $39 a year. It covers electricity only, not the purchase price, water, or installation.
How efficient is the Omnimax 3730-937 for its size?
98th 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
Source
ES_1136068_3730-937_11272025115630_80274160View certified refrigerator listingsENERGY STAR data as of July 2026Omnimax and 3730-937 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.