Model
Omnimax 3750-247
Rank #716 means 715 of the 1,000 refrigerator models we track cost less to run each year; the 75th efficiency percentile means it uses less energy for its size than 75% of those models.
What does the Omnimax 3750-247 cost to run per year?
At roughly $86 a year to run, ranking #716 of 1,000, the Omnimax 3750-247 costs more than the typical refrigerator model we track. It uses 10% less energy than the U.S. federal standard model in its class, which would cost about $97/yr to run, a saving of roughly $11 a year. Size-adjusted, this model beats 75% of refrigerator models we track on efficiency, better than most of its class. This class has no published efficiency-factor figure beyond annual kWh itself, so at 18.7 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 Moffat MBE19D***** at $86/yr runs a little cheaper and the Commercial Cool CCR2000GIMB at $87/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 3750-247's $86/yr adds up to roughly $1032 in electricity alone, before purchase price or repairs.
Also sold as: Criterion CBMR187M4*.
By the numbers
The Omnimax 3750-247 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 $86/yr, here is what the Omnimax 3750-247 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 3750-247 costs about $860. That is roughly $110 less than a standard model in its class, which would run closer to $970 over the same ten years.
How the Omnimax 3750-247 compares
The refrigerator class we track runs from $8 to $149 a year. At $86/yr, it runs about $22 a year above the class median of $64, and it is about $78 a year more than the cheapest refrigerator to run at $8. Against the US federal standard model for its class at about $97/yr, the Omnimax 3750-247 uses 10% less energy.
What drives its running cost
At 18.7 cu ft, the Omnimax 3750-247 is a large refrigerator for its class, which spans 1.2 to 31.7 cu ft with a median of 12.6 cu ft, size is usually the single biggest lever behind a running-cost figure, and at this end of the range there is more capacity to service, which tends to push the number up.
- 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 3750-247 cheap to run?
Its $86/yr running cost, rank #716 of 1,000, is above what most refrigerator models we track cost to run, so this is not one of the cheaper picks on electricity alone.
How much does the Omnimax 3750-247 cost per month?
About $7.21 a month, which is the $86 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: 466 kWh from ENERGY STAR times the US average of $0.1856/kWh comes to about $86 a year. It covers electricity only, not the purchase price, water, or installation.
How efficient is the Omnimax 3750-247 for its size?
75th 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 |
|---|---|---|
| 721 | Moffat MBE19D*****18.7 cu ft | $86 |
| 720 | L2 LRB19B5A***18.7 cu ft | $86 |
| 719 | Ikea VÄLGRUNDAD18.7 cu ft | $86 |
| 718 | Eurodesign RDBM191**18.7 cu ft | $86 |
| 717 | Element ERBM19***18.7 cu ft | $86 |
Source
ES_1136068_3750-247_041120220543261_8718861View certified refrigerator listingsENERGY STAR data as of July 2026Omnimax and 3750-247 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.