Extreme Cold Storage Door Semi Recessed Insulated Doors For Cold Rooms

Semi-Recessed Cold Room Door for Ultra-Low Temperature & Freezer Environments

Ultra-low temperature cold rooms operate under extreme conditions where door insulation, sealing, and anti-freezing performance directly affect system stability. The semi-recessed cold room door is engineered for freezer environments below -30°C, providing reliable thermal protection and smooth operation in deep-freeze and blast freezing applications.

This freezer door solution is widely used in industrial deep-freeze storage, quick freezing rooms, and ultra-low temperature cold storage facilities.

Design Requirements for -30°C and Below

Challenges in Ultra-Low Temperature Cold Rooms

At temperatures below -30°C, cold air leakage, frame icing, and door deformation become critical issues. Doors must withstand strong temperature differentials while maintaining airtight performance.

Semi-Recessed Structure for Thermal Stability

The semi-recessed design reduces exposed door edges and thermal bridges, helping maintain consistent internal temperatures and limiting frost formation in freezer rooms.

Product Specifications

Insulated Door Structure for Deep Freeze Applications

High-Density Polyurethane Insulation Core

The door leaf is filled with flame-retardant polyurethane insulation (40kg/m³ ±2), ensuring strong thermal resistance in ultra-low temperature environments.

Thick Door Leaf Options for Extreme Cold

Door thickness options of 100mm, 120mm, and 150mm are recommended for freezer rooms operating at -30°C to -45°C, improving insulation efficiency and reducing energy loss.

Anti-Freezing Door Frame and Threshold System

Heated Aluminum Alloy Door Frame

The aluminum alloy door frame can be equipped with three-sided or four-sided heating to prevent ice accumulation around the frame in deep-freeze environments.

Optional Heated Threshold for Continuous Operation

In blast freezers and high-humidity freezer rooms, an optional heated threshold ensures reliable door opening and closing, even under continuous low-temperature operation.

Sealing System for Ultra-Low Temperature Performance

EPDM and Magnetic Sealing for Freezer Doors

EPDM sealing strips combined with PVC magnetic seals maintain tight closure under extreme cold conditions, minimizing air infiltration and frost buildup.

Reduced Ice Formation at Door Edges

The optimized sealing design helps control moisture ingress, reducing ice formation that can affect door operation in ultra-low temperature cold rooms.

Typical Ultra-Low Temperature Applications

• Blast Freezer Rooms
• Deep Freezer Cold Storage (-30°C to -45°C)
• Quick Freezing Tunnels and Chambers
• Industrial Frozen Goods Storage Facilities
• Ultra-Low Temperature Processing Cold Rooms

Performance Advantages in Ultra-Low Temperature Use

• Stable Insulation Performance Below -30°C
• Reduced Energy Consumption in Deep Freeze Storage
• Reliable Door Operation Without Freezing
• Lower Maintenance Frequency in Extreme Cold
• Customizable Configuration for Different Freezer Projects

Frequently Asked Questions

Is a semi-recessed cold room door suitable for -40°C or lower temperatures?

Yes. With sufficient door thickness and a heated frame system, it is suitable for freezer rooms operating down to -45°C.

What door thickness is recommended for ultra-low temperature cold rooms?

For temperatures below -30°C, door thicknesses of 120mm or 150mm are strongly recommended.

Is frame heating mandatory for deep-freeze applications?

For ultra-low temperature environments, heated door frames are highly recommended to prevent icing and ensure reliable operation.