Model
Omnimax 3730-922
Rank #9 means 8 of the 622 freezer 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 Omnimax 3730-922 cost to run per year?
Rank #9 of 622 puts the Omnimax 3730-922 at the very top of the cheapest-to-run leaderboard for its class, at roughly $32 a year. It uses 10% less energy than the U.S. federal standard model in its class, which would cost about $36/yr to run, a saving of roughly $4 a year. Size-adjusted, this model ranks near the bottom of its class on efficiency, ahead of just 18% of freezer models we track. This class has no published efficiency-factor figure beyond annual kWh itself, so at 3.5 cu ft (the class spans 1.1 to 23), size is the clearest lever we can point to for this model's running cost.
Immediately around it on the leaderboard, the Midea MRC04M3C** at $32/yr runs a little cheaper and the Epic ECF50W-1 at $34/yr runs a little more, a sense of how tightly models are packed at this point in the ranking. A freezer typically stays in service for somewhere around 14 years; over that span, the Omnimax 3730-922's $32/yr adds up to roughly $448 in electricity alone, before purchase price or repairs.
Also sold as: Arctic King ARC04B2C**.
By the numbers
The Omnimax 3730-922 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 $32/yr, here is what the Omnimax 3730-922 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 3730-922 costs about $320. That is roughly $40 less than a standard model in its class, which would run closer to $360 over the same ten years.
How the Omnimax 3730-922 compares
The freezer class we track runs from $25 to $120 a year. At $32/yr, it runs about $43 a year cheaper than the class median of $75, and it is about $7 a year more than the cheapest freezer to run at $25. Against the US federal standard model for its class at about $36/yr, the Omnimax 3730-922 uses 10% less energy.
What drives its running cost
At 3.5 cu ft, the Omnimax 3730-922 is a small freezer for its class, which spans 1.1 to 23 cu ft with a median of 13.8 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. As with refrigerators, more cubic feet of frozen storage generally means a bigger compressor and a higher annual energy figure.
- Insulation and defrost type. Better-insulated cabinets lose less cold to the surrounding room, and frost-free (automatic-defrost) freezers run a periodic heating element that a manual-defrost model does not.
- Chest vs upright design. Door orientation affects how much cold air escapes per opening: top-opening chest designs generally hold cold better than front-opening upright ones.
Common questions
Is the Omnimax 3730-922 cheap to run?
Yes. Its $32/yr running cost puts it at rank #9 of 622, below what most freezer models we track cost to run.
How much does the Omnimax 3730-922 cost per month?
About $2.69 a month, which is the $32 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: 174 kWh from ENERGY STAR times the US average of $0.1856/kWh comes to about $32 a year. It covers electricity only, not the purchase price, water, or installation.
How efficient is the Omnimax 3730-922 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 |
|---|---|---|
| 11 | Midea MRC04M3C**3.5 cu ft | $32 |
| 10 | Master Chef 043-0292-23.5 cu ft | $32 |
| 9 | Arctic King ARC04B2C**3.5 cu ft | $32 |
| 8 | Arctic King AC35ESKCR1RCM3.5 cu ft | $32 |
| 7 | Danby DCF035A5WDB3.5 cu ft | $32 |
Source
ES_1136068_3730-922_121720250124933_3501957View certified freezer listingsENERGY STAR data as of July 2026Omnimax and 3730-922 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.