How to Choose Cold Room Panel Thickness? Ideal Dimensions and Tips
When installing cold storage facilities and industrial refrigeration systems, one of the most critical engineering decisions to make is choosing the correct panel thickness. Panel thickness directly affects your facility's energy efficiency, the lifespan of your cooling equipment, and the safety of stored products.
A sandwich panel chosen too thin will cause constant heat loss and, as a result, high electricity bills. On the other hand, using a panel that is thicker than necessary will unnecessarily increase your initial investment cost (Capex). So, how is cold room panel thickness chosen for maximum efficiency and optimum cost? Here are the details you need to pay attention to.
3 Key Factors That Determine Panel Thickness
There is no single "standard" dimension for achieving proper insulation. The following three main factors should be evaluated according to your project's needs:
Indoor Environment (Target) Temperature: The type of product to be stored determines the operating temperature of the room. The colder the room needs to be, the thicker the panel must be in order to keep heat transfer (U value) at a minimum.
Outdoor Conditions and Climate: The climatic conditions of the geographical region where the cold storage facility will be installed are critical. Whether the facility is built outdoors, exposed to direct sunlight, or inside an enclosed factory building changes the insulation requirement. In very hot regions, panels one level thicker than standard should be preferred.
Type of Insulation Material: As the industry standard, sandwich panels filled with Polyurethane (PUR), generally with a density of 40-42 kg/m³ and providing the best thermal insulation coefficient, or Polyisocyanurate (PIR), which has higher fire resistance, are used.
Ideal Panel Thicknesses According to Temperature Values
According to widely accepted engineering standards, the ideal polyurethane panel thicknesses to choose based on room types and target temperatures are as follows:
Room Type | Temperature Range | Recommended Panel Thickness | Usage Areas |
Cool Room / Preparation | +8°C to +15°C | 60 mm – 80 mm | Product processing areas, anterooms, medicine storage, chocolate storage. |
Cold Room | -5°C to +5°C | 80 mm – 100 mm | Fresh fruit/vegetables, fresh meat, dairy products, vaccines. |
Frozen Room | -18°C to -25°C | 120 mm – 150 mm | Frozen meat, ice cream, frozen bakery products. |
Blast Freezing Room | -35°C to -40°C | 150 mm – 200 mm | Areas used to rapidly lower the core temperature of fresh products. |
Floor Insulation: A Detail You Should Not Overlook
As important as choosing the wall and ceiling panels correctly is, floor insulation is also vital. Especially in frozen rooms at -18°C and below and in blast freezing rooms, standard floor panels may not always be sufficient or practical.
In industrial facilities that require high load-bearing capacity (use of pallet jacks and forklifts), laying high-density XPS (Extruded Polystyrene) insulation boards on the floor and then applying reinforcement and concrete on top is a much longer-lasting and safer insulation method.
Conclusion
Correctly determining panel thickness in your cold room investments is the most profitable step that will reduce your business's energy costs in the long term. By carrying out the needs analysis correctly, you can choose the insulation solution most suitable for your products and your storage facility's physical conditions.
