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BoschKIR21NSE0G

Integrated
Under-counter

£519View retailers

Test score

Lowest available price

£519Buywise

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Looking for a built-in fridge? The Bosch KIR21NSE0G is a fuss-free option, but is it any good at keeping food fresh? In a category of appliances that tend to overindulge with their energy use, we took this into account when we tested it. Read our full review to see what they made of it.

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cons

What's included?

What is it?
Does it chill food well?
Does it maintain a stable temperature in hot rooms?
How energy-efficient is it?
How easy is it to use and clean?
Is there anything else I should know?
Should I buy it?

KEY TEST RESULTS
Cooling power
Energy efficiency
Accuracy of thermostat setting

May 2025Last checked by Which?
Dec 2023First reviewed by Which?
Sept 2022Released

The overall Which? test score is made up of the following star ratings, all determined by our rigorous lab tests.

How we test fridges

14 May 2025

Cooling power

How we test cooling power

We test cooling power by seeing how quickly a fridge chills, as the faster food cools the longer it will last, the more nutrients it will retain and the less chance there is for harmful bacteria to thrive.

Accuracy of thermostat setting

How we test accuracy of thermostat setting

To see whether you can rely on a fridge's thermostat to create perfect temperatures for storing chilled food, we set the fridge up following the manufacturer's recommended thermostat setting. Models scoring five stars have reliable thermostats that are spot on, whereas for models scoring two stars or less you would need to set the temperature using a separate fridge thermometer.

Energy efficiency

How we test energy efficiency

How energy-efficient the fridge is for the amount of usable space it offers. Fridges are switched on 24/7, so it's important to choose one that won't cost a fortune to run. The best fridges score four or five stars and use a minimal amount of energy to cool food. You can spot the real energy guzzlers as they're awarded a poor one or two stars in this test.

Quietness

How we test quietness

We assess how noisy each fridge is when the compressor's running and when it switches on and off.

Ease of use

How we test ease of use

To see whether a fridge is easy to use, we rate aspects such as how sturdy the shelves and drawers are, how smoothly the drawers slide in and out, whether there are enough door racks and shelves for the size of the fridge, whether the fridge is easy to programme and whether the thermostat is easy to adjust.

Ease of cleaning

How we test ease of cleaning

We spray cherry juice inside each fridge, let it dry to a sticky mess and then rate how easy it is to clean, to see how likely food and drink spills are to seep into hard-to-reach spots and crevices.

General
Type	Integrated
Size	Under-counter
Colour	white
Height	88cm
Width	55cm
Usable storage	100 litres
Climate class (°C)	10 to 38
Material of rear backing	Aluminium laminate
Flame-retardant backing?	Yes
Energy rating	E
Annual energy cost (£)	£33.34

Features
Ice box	No
Number of shelves	3
Bottle grip?	No
Adjustable door racks?	Yes

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Buywise
In Stock£519

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