Cold rooms, freezers, and temperature-controlled warehouses consume a significant amount of energy because their operation basically revolves around temperature. However, many facilities use far more energy than they actually need. 

Why? Because seemingly small inefficiencies compound quickly: a misaligned door, dust-packed coil, or poorly planned workflow can end up costing thousands of pounds a year. Making energy efficiency in cold storage fundamental to operational costs, product integrity, and compliance. 

The good news is that most improvements are straightforward, cost-effective, and can deliver immediate savings. 

1. Improve Insulation & Minimise Thermal Leakage

Cold storage efficiency starts with your envelope - the thermal insulation system of a building, including the walls, floors, ceilings, and most importantly, the doors. Any point where warm air can infiltrate, forces your refrigeration system to work harder and burn more energy. 

Here’s what we suggest:

Improve Insulation Throughout the Facility

Well-insulated walls, floors, and ceilings reduce heat transfer and help maintain stable internal temperatures. This is what you want to look for:

  • High-quality insulated panels that maintain compression over time

  • Vapour barriers that prevent moisture ingress and ice build-up

  • Seam integrity, especially around corners and junctions

Even small voids or panel damage can create thermal bridges that send efficiency right out the door (literally).

Check Door Seals, Hinges & Dock Interfaces

Your cold room doors are some of the most vulnerable points for leakage. Over time, if you opted for a “budget-friendly” door over a high-quality one, seals can lose elasticity, hinges drop, and dock levellers leave gaps that invite warm air in.

A quick check once a month goes a long way:

  • Are the gaskets cracked, brittle, or pulling away from the frame?

  • Does the door self-close properly, or is it catching on the floor?

  • Are dock shelters and levellers maintaining a proper seal during loading?

If any of these are the weak points in your set-up, addressing them gives you the biggest immediate return.

Use Thermal Imaging to Identify Hidden Leaks

It might sound a bit dramatic, but thermal imaging surveys are actually one of the most effective diagnostic tools in cold storage. They can reveal:

  • Gaps behind panels

  • Delaminated insulation

  • Door areas where compression is failing

  • Air infiltration around service penetrations

It’s a fast, useful way to target the areas costing you the most energy.

2. Maintain Refrigeration & HVAC Equipment Properly

Even a perfectly insulated cold room can’t perform properly if the cooling equipment is neglected. Here’s what to do:

Clean Coils Regularly

Dirty evaporator and condenser coils restrict heat exchange and force systems to work harder. Even just a thin layer of dust or ice can drastically reduce efficiency.

We recommend making these tasks routine for your cleaning crew:

  • Brush and vacuum condenser fins

  • Remove ice or frost from evaporators

  • Check for obstructions to airflow

Check Refrigerant Charge

The wrong refrigerant levels (too high or too low) will reduce cooling efficiency and increase your energy consumption. Regular checks help to prevent long-term strain on the system and avoid costly failures.

Inspect Fans and Motors

Fans that are worn or running inefficiently can cause uneven temperature distribution, hot spots, and slower pull-down times.

Here’s what to look out for:

  • Noisy motors

  • Reduced airflow

  • Damaged or unbalanced fan blades

You’ll find that preventive maintenance costs far less than emergency repairs, so be sure to check in every now and then.

3. Improve Layout & Airflow

Cold air needs space to move. Even in a perfectly insulated room with top-notch, regularly maintained equipment, poor internal layout can create warm zones, pressure imbalances, and unnecessary strain on your refrigeration plant.

Here at Kenfield, we’ve been trusted by major supermarkets and cold chain operators across the UK, Europe, the Middle East, Africa, Asia, North America, and Australasia since 1983. Over the years, we’ve learnt how small layout tweaks can deliver big energy savings. 

Here are the practices that consistently make the strongest difference:

Keep Evaporators Clear

Your evaporators are the heart of the cold room’s airflow. When they’re blocked by pallets, packaging, or accidental “temporary storage,” the air can’t circulate correctly. This leads to warm pockets, ice build-up, and compressors working overtime to compensate.

Always maintain the manufacturer-recommended clearance and avoid stacking pallets directly beneath or in front of airflow outlets.

Choose Racking That Supports Even Airflow

Racking isn’t just a storage choice - it’s a thermal design decision.

Open or perforated racking helps cold air move freely through aisles and between stock, ensuring temperatures stay consistent across the entire space. This reduces the load on your refrigeration system and prevents hotspots that can jeopardise product quality.

Plan Efficient Traffic Routes

Human and machinery movement has a direct impact on energy use. Every time a door opens, warm air rushes in while cold air spills out.

By designing thoughtful, logical routes for: 

  • Picking and packing

  • Restocking and rotation

  • Forklift and pedestrian flow

…you minimise unnecessary door cycles and shorten the time each door stays open. In most facilities, this is one of the biggest contributors to reducing thermal loss and stabilising temperatures. 

Thoughtful layout and airflow design are more of an operational habit than a one-off task. But when done well, it makes the entire facility easier and cheaper to run.

4. Choose Doors Built for Cold Storage

Cold storage doors are not all equal. The right door can significantly reduce thermal leakage, manage traffic flow, and cut energy use - especially in high-use commercial environments. 

Kenfield designs and manufactures a range of specialist cold storage door solutions, all engineered for demanding temperature-controlled environments. Each performs exceptionally well, but each serves different operational needs.

Kenfield K750 Energy Door

  • Patented, award-winning, and installed in over 35,000 supermarkets across the UK and Europe

  • High insulation performance and robust sealing

  • Fast, smooth operation ideal for high-traffic areas

  • Excellent for facilities struggling with energy loss from frequent openings

  • More durable and thermally efficient than clear PVC strip curtains

  • Helps improve efficiency, but won’t “fix” pre-existing icing or refrigeration faults - it works best as part of a well-maintained system

Kenfield K2 Insulated Strip Door Curtain

  • Flexible, insulated panels that allow easy access

  • Effective at reducing cold air loss for pedestrian and light-traffic zones

  • A good alternative where a full door isn’t ideal

  • Maintains visibility while still providing insulation

  • Lower maintenance than traditional clear PVC strips, which are often removed or damaged over time

5. Train Staff on Energy-Saving Practices

Even the best equipment can’t overcome poor habits. A well-trained team is one of the most effective tools for controlling energy use.

We recommend focusing training on:

  • Minimising unnecessary door openings: Explain why even a few seconds of exposure can force the system to work harder

  • Correct loading and handling procedures: Reduce waiting times with consolidated loading and unloading

  • Reporting anomalies: Encourage staff to flag ice build-up, unusual noises, temperature alarms and doors not closing properly

Recording fluctuations early prevents major product losses later.

Remember - Efficiency Is a Series of Small Wins

Energy efficiency in cold storage isn’t achieved through one big upgrade - it’s the cumulative impact of dozens of small, well-maintained, well-managed details. Because while each change may feel minor, together they create a more stable environment, lower running costs, and a refrigeration plant that isn’t constantly fighting to keep up.

Kenfield’s cold storage solutions are engineered to make those improvements easier - offering high-performance doors, insulated products, and durable systems that help operators get the most from their energy expenditure.

If you’d like guidance choosing the right door for your facility, or want to discuss a bespoke cold storage solution, the Kenfield team is always here to help. Just give us a call at +44 (0)121 451 3051 or use our contact form, and we’ll get back to you!