For a good cold room, using the right insulation system is very important—cause the entire refrigeration efficiency depends on how well the structure keeps cold air inside. Energy loss not only increases electricity consumption but also affects product freshness and storage stability. Insulated sandwich panels are the key solution to keep consistent temperature and reduce energy waste effectively.
The PU sandwich panel is the most common and efficient insulation material used in modern cold storage construction. It is made of two layers of pre-painted steel sheet with a polyurethane (PU) insulated core in between. PU foam has one of the lowest thermal conductivity levels among building materials, meaning it minimizes heat transfer between the inside and outside of the room. Propanel (propaneltech.com) focuses on manufacturing high-performance PU cold room panels, providing customers with stable insulation, long lifespan, and fire-resistant performance at the same time.
Before selecting insulated panels, it is important to match the panel thickness with the target temperature of the cold room. The following table shows the general recommendation:
|
Panel Thickness (mm) |
Storage Temperature (°C) |
Typical Application |
|
75 mm |
+10°C to +5°C |
Food processing, air-conditioned room |
|
100 mm |
+5°C to -5°C |
Chiller room, fruit and vegetable storage |
|
150 mm |
-5°C to -20°C |
Frozen meat, dairy storage |
|
200 mm |
-20°C to -40°C |
Deep freezer, ice cream cold room |
Proper installation and sealing of the PU sandwich panels are equally important. Gaps, uneven joints, or unsealed corners may cause cold air leakage—resulting in continuous energy loss and compressor overload. That’s why Propanel emphasizes professional installation guidance and precise joint systems to ensure the panels fit tightly, keeping the cold room fully sealed.