Model
Kitchenaid KRMF436SPS
Rank #973 means 972 of the 1,000 refrigerator models we track cost less to run each year; the 71st efficiency percentile means it uses less energy for its size than 71% of those models.
What does the Kitchenaid KRMF436SPS cost to run per year?
Do the math and the Kitchenaid KRMF436SPS's $136/yr puts it at rank #973 of 1,000, in the bottom five percent on cost for its class. It uses 10% less energy than the U.S. federal standard model in its class, which would cost about $150/yr to run, a saving of roughly $14 a year. Normalized for capacity, it beats 71% of refrigerator models we track, a better-than-average efficiency result. At 28.9 cu ft, it is a large refrigerator for the class, which runs 1.2 to 31.7 cu ft; size and efficiency are the two levers behind the figure above, and this dataset does not carry a separate efficiency-factor column for this class.
Immediately around it on the leaderboard, the Samsung RF70F27SE* at $135/yr runs a little cheaper and the Whirlpool WRMF3536SZ at $136/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 Kitchenaid KRMF436SPS's $136/yr adds up to roughly $1632 in electricity alone, before purchase price or repairs.
Also sold as: Whirlpool WRMF3536SZ, Whirlpool WRMF3736SW.
By the numbers
The Kitchenaid KRMF436SPS 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 $136/yr, here is what the Kitchenaid KRMF436SPS adds up to before purchase price, water, or repairs enter the math.
Left running for a decade at today's US average rate, the Kitchenaid KRMF436SPS costs about $1360. That is roughly $140 less than a standard model in its class, which would run closer to $1500 over the same ten years.
How the Kitchenaid KRMF436SPS compares
The refrigerator class we track runs from $8 to $149 a year. At $136/yr, it runs about $72 a year above the class median of $64, and it is about $128 a year more than the cheapest refrigerator to run at $8. Against the US federal standard model for its class at about $150/yr, the Kitchenaid KRMF436SPS uses 10% less energy.
What drives its running cost
At 28.9 cu ft, the Kitchenaid KRMF436SPS is a large refrigerator for its class, which spans 1.2 to 31.7 cu ft with a median of 12.6 cu ft, among refrigerator models, bigger capacity is the most common reason a running-cost figure lands on the high side, all else being equal.
- Interior volume. Cubic feet of interior volume is the first thing that scales a fridge's running cost up or down, before compressor quality even enters the picture.
- Counter depth vs standard depth. Counter-depth models sit flush with cabinets but usually hold less interior volume than a standard-depth model of the same width, which can nudge the per-cubic-foot running cost either way.
- Compressor technology. Newer variable-speed (inverter) compressors modulate output instead of cycling fully on and off, which tends to use less energy for the same cooling job than an older fixed-speed compressor.
- Placement and ventilation. A fridge pushed tight against a wall or cabinet, or standing next to an oven or in direct sun, works harder to shed the heat its compressor produces, which can push real-world cost above the published figure.
Common questions
Is the Kitchenaid KRMF436SPS cheap to run?
Not especially. At $136 a year it ranks #973 of 1,000 refrigerator models we track, in the pricier part of its class to run, though its size and features may still justify that for your needs.
How much does the Kitchenaid KRMF436SPS cost per month?
Roughly $11.34/mo, spreading the $136/yr estimate evenly across twelve months at $0.1856/kWh. Actual monthly bills swing with your rate and usage pattern.
How is this running-cost figure calculated?
We take the model's published annual energy use of 733 kWh from ENERGY STAR and multiply it by the US average residential electricity rate of $0.1856/kWh, giving about $136 a year. It is an electricity-only estimate and does not include purchase price, water, or installation.
How efficient is the Kitchenaid KRMF436SPS for its size?
71st 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 |
|---|---|---|
| 972 | Samsung RF70F27SE*25.5 cu ft | $135 |
| 971 | Lg LRFS28XB*27.9 cu ft | $135 |
| 970 | Ge Profile PFE28KYN****27.8 cu ft | $135 |
| 969 | Ge GFE28GEL****27.8 cu ft | $135 |
| 968 | Frigidaire FRFS282LAF27.9 cu ft | $135 |
Source
ES_22856_KRMF436SPS_052120250206757_7872083View certified refrigerator listingsENERGY STAR data as of July 2026Kitchenaid and KRMF436SPS 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.