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Kostch KOS-36RF*##*-**

21.6 cu ft bottom freezer. Uses 10% less energy than the federal limit for its class. #403 of 432 bottom-freezer fridges 18–22 cu ft, by yearly cost.

Source: EPA ENERGY STAR Certified Residential Refrigerators dataset, data.energystar.gov. Refreshed Oct 24, 2026.

$119 at 18.16¢/kWhper year
$1,195 at 18.16¢/kWhover 10 years
$127 at 18.16¢/kWh10-yr extra vs. similar size

Recall check

No CPSC recall found for this brand's fridges as of Oct 24, 2026

We search CPSC recall titles and product names for refrigerators, fridges and freezers. Always confirm at cpsc.gov.

Rebates

Rebates change by ZIP code and store. Check rebates near you.

Your electric rate18.16¢per kWh. Find it on your bill. Default is the U.S. average.

Yearly cost, side by side

This model$119 at 18.16¢/kWh
Typical similar-size model (404 bottom freezer models)$107 at 18.16¢/kWh
Federal max for this class$131 at 18.16¢/kWh
Thirstiest certified bottom-freezer fridges$145 at 18.16¢/kWh
Good to know
Fridges run all day, so the EPA test figure is close to real use. A warm kitchen, frequent door opening and an ice maker can push it higher.

Also sold as

The symbols * may be replaced by A to Z. The symbols # may be replaced by 0 to 9. It means the color of enclosure.

An asterisk in the model number stands for color or trim codes, so those finishes share these figures.

Certification history

ENERGY STAR certified 2024-11-15. On the market since 2024-11-11. EPA record 3798701.

Energy and specs

TypeBottom Freezer
Product class5A - Refrigerator-freezers - automatic defrost with bottom-mounted freezer with through-the-door ice service
Total capacity21.6 cu ft
Adjusted volume26.7 cu ft
Height × width69.9 × 35.8 in
Counter depthNo
CompactNo
Built-inNo
Ice makerYes
Through-door dispenserYes
DefrostAutomatic
Connected (smart)No
Annual energy use658 kWh
Federal max for its class722 kWh
MarketsUnited States, Canada

Source: EPA ENERGY STAR Certified Residential Refrigerators, record 3798701. Most Efficient reflects the EPA field "meets most efficient criteria".

Similar models from other brands

Rule: certified bottom-freezer fridges within 2 cu ft of this one (19.6 to 23.6 cu ft), other brands only, lowest energy first.

BrandModelSizeEnergyCost
Fisher & PaykelRF201A*****20.1 cu ft448 kWh$81 at 18.16¢/kWh/yr
Fisher & PaykelRS3684W* Ice & Water19.6 cu ft457 kWh$83 at 18.16¢/kWh/yr
TCLTRF20S5AL-S120.3 cu ft461 kWh$84 at 18.16¢/kWh/yr
Hamilton BeachHBF206720.3 cu ft461 kWh$84 at 18.16¢/kWh/yr
Hamilton BeachHBF2067/HZ760220.3 cu ft461 kWh$84 at 18.16¢/kWh/yr
KenmoreKKFDR36x20.3********20.3 cu ft461 kWh$84 at 18.16¢/kWh/yr
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