Model
Koolmore KM-RER36-FDPR
Rank #850 means 849 of the 1,000 refrigerator models we track cost less to run each year; the 47th efficiency percentile means it uses less energy for its size than 47% of those models.
What does the Koolmore KM-RER36-FDPR cost to run per year?
Rank #850 of 1,000 puts the Koolmore KM-RER36-FDPR among the pricier refrigerator models we track to keep running, at roughly $109 a year. It uses 10% less energy than the U.S. federal standard model in its class, which would cost about $120/yr to run, a saving of roughly $11 a year. Size-adjusted, this model sits close to the class median on efficiency, ahead of 47% of refrigerator models we track. This class has no published efficiency-factor figure beyond annual kWh itself, so at 19.6 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 Frigidaire FGHG2368T* at $109/yr runs a little cheaper and the Cosmo COS-FDR223GWSS at $110/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 Koolmore KM-RER36-FDPR's $109/yr adds up to roughly $1308 in electricity alone, before purchase price or repairs.
By the numbers
The Koolmore KM-RER36-FDPR 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 $109/yr, here is what the Koolmore KM-RER36-FDPR adds up to before purchase price, water, or repairs enter the math.
Left running for a decade at today's US average rate, the Koolmore KM-RER36-FDPR costs about $1090. That is roughly $110 less than a standard model in its class, which would run closer to $1200 over the same ten years.
How the Koolmore KM-RER36-FDPR compares
The refrigerator class we track runs from $8 to $149 a year. At $109/yr, it runs about $45 a year above the class median of $64, and it is about $101 a year more than the cheapest refrigerator to run at $8. Against the US federal standard model for its class at about $120/yr, the Koolmore KM-RER36-FDPR uses 10% less energy.
What drives its running cost
At 19.6 cu ft, the Koolmore KM-RER36-FDPR is a large refrigerator for its class, which spans 1.2 to 31.7 cu ft with a median of 12.6 cu ft, and larger refrigerator 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.
- 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 Koolmore KM-RER36-FDPR cheap to run?
Its $109/yr running cost, rank #850 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 Koolmore KM-RER36-FDPR cost per month?
About $9.11 a month, which is the $109 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: 589 kWh from ENERGY STAR times the US average of $0.1856/kWh comes to about $109 a year. It covers electricity only, not the purchase price, water, or installation.
How efficient is the Koolmore KM-RER36-FDPR for its size?
47th 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 |
|---|---|---|
| 849 | Frigidaire FGHG2368T*22.4 cu ft | $109 |
| 848 | Zline RFM-3622.5 cu ft | $109 |
| 847 | Smeg FQ55UFX22.5 cu ft | $109 |
| 846 | Midea MRQ23P4AST22.5 cu ft | $109 |
| 845 | Midea MDRM848FGF04PRR22.5 cu ft | $109 |
Source
ES_1147715_KM-RER36-FDPR_03222025104526_6737939View certified refrigerator listingsENERGY STAR data as of July 2026Koolmore and KM-RER36-FDPR 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.