Temp log
Frozen storage −18°C or colderChilled foods 0 to 5°C typicalBananas avoid below ~13°CDanger zone 5–60°CIce cream hardening −25°C to −30°CLeafy greens 0–2°C, high humidityChocolate around 15–18°C, dryLive seafood species-specificBlast freezer air −30°C to −40°CCured vanilla cool, dry, sealedFrozen storage −18°C or colderChilled foods 0 to 5°C typicalBananas avoid below ~13°CDanger zone 5–60°CIce cream hardening −25°C to −30°CLeafy greens 0–2°C, high humidityChocolate around 15–18°C, dryLive seafood species-specificBlast freezer air −30°C to −40°CCured vanilla cool, dry, sealed

Food Tech

Commercial kitchen refrigeration energy efficiency: practical upgrades for foodservice operators

Refrigeration runs around the clock in a commercial kitchen. Small maintenance habits and targeted upgrades can cut energy use without risking food safety.

By Editorial desk · · 3 min read

Quick wins
Clean condensers, check door gaskets, set correct temperatures
Upgrades
EC fan motors, LED lighting, door closers, strip curtains
Replacement
High-efficiency units with hydrocarbon refrigerants

Commercial kitchens rely on refrigeration: reach-in fridges, under-counter units, walk-in cold rooms, freezers, prep tables and ice machines. These units run 24 hours a day, and in a hot kitchen they work hard. For many restaurants, cafés, hotels and institutional kitchens, refrigeration is one of the largest parts of the electricity bill. This guide covers practical steps to improve efficiency.

Start with maintenance

Many efficiency problems come from simple maintenance gaps.

Clean condenser coils. Dust and grease on condenser coils reduce heat transfer, so compressors work harder. In a kitchen, coils can get dirty quickly. Regular cleaning is one of the most effective steps.

Check door gaskets. Torn or loose gaskets let warm air in. A simple test is to close the door on a piece of paper; if it slides out easily, the seal may need attention.

Defrost freezers. Ice buildup on evaporators reduces performance. Make sure automatic defrost works and that drains are clear.

Check temperatures. Units set colder than needed waste energy. Follow food safety requirements, but do not overcool. Use calibrated thermometers to check.

Keep vents clear. Do not block air vents inside units or around condensers.

Use equipment well

  • Keep doors closed and avoid propping them open.
  • Organise stock so staff can find items quickly.
  • Do not overload units; air needs to circulate.
  • Let hot food cool appropriately, using a blast chiller where possible, rather than putting large amounts of hot food into standard fridges.
  • Place units away from ovens, fryers and dishwashers where possible.

Upgrades with good returns

EC fan motors. Electronically commutated motors use less energy than older shaded-pole motors in evaporators and condensers.

LED lighting. LEDs use less energy and produce less heat than older lighting in display units and walk-ins.

Door closers and strip curtains. Automatic closers and plastic strip curtains on walk-ins reduce warm air entry.

Controllers. Smart controllers manage defrost cycles, fan speed and anti-sweat heaters to reduce energy use.

Insulation repairs. Damaged walk-in panels and doors should be fixed.

When to replace

Older refrigeration units may use much more energy than modern models. When replacing:

  • Look for energy labels or efficiency ratings where available.
  • Choose correctly sized equipment; oversized units waste energy.
  • Consider units using hydrocarbon refrigerants such as R290, which are efficient and have low global warming potential.
  • Check noise and heat output, since units in the kitchen affect staff comfort.

Ice machines

Ice machines use energy and water. Efficient models, correct sizing and regular cleaning help. Locating ice machines away from heat sources and making sure air-cooled condensers have good airflow also matters.

Walk-in cold rooms

Walk-ins deserve special attention because they are large and opened often. Check that door heaters and closers work, that the floor and wall panels are not damaged, and that evaporator fans are not blocked by stacked stock. Keep the most-used items near the door so staff spend less time inside with the door open. Where a kitchen has both a walk-in chiller and a walk-in freezer, an anteroom arrangement in which the freezer opens into the chiller reduces the warm air reaching the freezer. Lights left on inside walk-ins add heat as well as using power, so motion sensors or timers can help.

Monitoring

Temperature monitoring systems help with both food safety and efficiency. Wireless sensors can record temperatures, warn about doors left open and show when units are struggling, which may indicate a need for maintenance.

A practical checklist

  1. Clean condenser coils on a regular schedule.
  2. Check and replace door gaskets.
  3. Confirm temperature settings and calibrate thermometers.
  4. Train staff on door discipline and loading.
  5. Fit LEDs, EC motors and door closers where suitable.
  6. Plan replacement of old, inefficient units.
  7. Use monitoring to spot problems early.

Energy efficiency in commercial kitchen refrigeration does not need to be complicated. Regular maintenance, good habits and a few targeted upgrades can reduce costs while protecting food safety.

Key figures above are general reference points, not regulatory limits.