c/kWh
Total capacity
323 L
219 L fridge + 104 L freezer
Energy rating
2.5
Star rating index 2.51
Annual electricity use
401 kWh
Label figure (comparative energy consumption)
Estimated running cost
$132 / year
$11.03 / month Β· $1,323 over 10 years

37% more electricity than the median of 59 comparable 300–399 L bottom-mount fridge freezer registrations (293 kWh a year). It uses less than 3% of them. At 33c/kWh that is about $36 a year more than the median, $356 over 10 years.

Uses 18% less than the maximum allowed for its size and type under the minimum energy performance standard (487 kWh a year MEPS level).

Cost = label kWh Γ— 33c/kWh in NZD; change the price above to your tariff.

How efficient is it for its size?

kWh per year. Bar: the middle 80% of 59 comparable 300–399 L bottom-mount fridge freezer registrations. Dot: this model (above the median). Hover or tab to a mark for its value.

Cohort: every currently registered 300–399 L bottom-mount fridge freezer sold in New Zealand, counted once per registration. Star ratings already account for size through the GEMS adjusted-volume formula; this comparison is in raw kWh against models a buyer would actually consider instead.

Omega OBMF357B running cost

Per month
$11.03
Per year
$132
5 years
$662
10 years
$1,323

401 kWh Γ— 33c/kWh. No inflation or tariff change assumed. Fridges run continuously, so the label figure is a whole-year estimate under standard test conditions.

Capacity and compartments

Total gross volume
323 L
Fresh food (fridge) volume
219 L
Frozen storage volume
104 L
GEMS adjusted volume
405 L
freezer compartment
104 L gross
fresh food compartment
219 L gross

Gross volumes exclude shelving. Fresh food = fresh food, chill and cellar compartments; frozen = freezer, two-star and ice-making (zero-star) compartments. Adjusted volume weights frozen space more heavily and is what the government uses to set the star rating for the size.

Similar bottom-mount fridge freezers that use less electricity

Same type, total capacity within 12% of 323 L, at least 3% lower annual kWh.

ModelStarsEst. cost / yrCompare
Liebherr CNef 4315350 L187 kWh/yr6$62
Liebherr SCNsdh 5253332 L194 kWh/yr6$64
Miele KFN 4375 DD edt/cs330 L194 kWh/yr6$64
Whirlpool WB3260IUXX290 L195 kWh/yr5.5$64
Whirlpool WB3260IUBL290 L195 kWh/yr5.5$64

Fridges similar to the Omega OBMF357B

ModelCapacityStarskWh / yr
Coldstream CBR320
same capacity, same door count, similar external size, similar star rating
323 L2.5401
Robinhood RHBMF323MSD
same capacity, same door count, similar external size, similar star rating
323 L2.5401
Panasonic NR-BC321BUH8
same capacity, same door count, similar external size
322 L5238
Panasonic NR-BC321BUK8
same capacity, same door count, similar external size
322 L5238
Konka KRF-314W
4% smaller, same door count, similar external size, similar star rating
310 L2.5360
Konka KRF-314SS
4% smaller, same door count, similar external size, similar star rating
310 L2.5360
Ikea ALINGSΓ…S 80567961
2% smaller, same door count, similar external size
316 L4298
Miele KFN 4375 DD edt/cs
2% larger, same door count, similar external size
330 L6194

Same consumer type, total capacity within 12% of 323 L; ordered by closeness of capacity, then lowest annual kWh.

Compare OBMF357B with another fridge

Omega OBMF357B specifications

Type
Bottom-mount fridge freezer
Configuration
Upright
Doors
2
Defrost
Variable defrost controller
Ice maker
–
Width
600 mm
Height
1,850 mm
Depth
685 mm
Annual energy (label)
401 kWh
Star rating index
2.510
MEPS level (maximum allowed)
487 kWh
kWh per adjusted litre
0.991
Country of manufacture
China

Other model numbers on registration ZRF0983

Registered together with the same test results, usually colour or finish variants.

New Zealand E3 registration details

Registration number
ZRF0983
GEMS registration id
180773
Status
approved, available (self-reported)
Registration expires
n/a (NZ registration)
Registered for sale in
New Zealand
Family
OBMF357
Designation
Refrigerator/freezer
Product class
Class 6
GEMS group
Group 5B: refrigerator-freezer, automatic defrost, bottom-mounted freezer
Regulatory standard
EE Amendment Regulations 2025 Schedule 2E
Test standard
AS/NZS IEC 62552.3:2018
Consumer type rule
GEMS group 5B (frost-free fridge freezer, bottom-mounted freezer) with one or two doors

Source: E3 programme registration data (EECA, New Zealand) (trans-Tasman E3 registration data published by DCCEEW on data.gov.au, CC BY 3.0 AU). Dataset published 25 September 2026; last checked 26 September 2026. How the derived figures are calculated.