New Dynaco E-402 Freezer² High-Speed Double-Curtain Door for Freezer Rooms

The door opens at up to 2.0 m/s, closes at an adjustable 0.8 m/s, and fits openings up to 4,500 mm wide and 5,600 mm high. Its curtain reinserts itself automatically after an impact, so a forklift collision does not stop the line.

E-402 Freezer² at a glance

• Product type: high-speed interior roll-up door for freezer and cold-storage applications
• Operating temperature: -35 °C to +10 °C, with a maximum temperature difference of 40 °C between both sides
• Curtain: double curtain with an insulating air gap, thermal transmittance 1.4 W/m²K
• Speed: opening up to 2.0 m/s, closing 0.8 m/s (adjustable)
• Sizes: width 800–4,500 mm, height 2,100–5,600 mm
• Anti-ice features: heated side guides, heated motor and frame, integrated air blower and air dryer
• Durability: tested for 1,000,000 cycles, wind load Class 3
• Compliance: conforms to EN 13241-1
• Manufacturer: Dynaco, part of the ASSA ABLOY Group

How does a double curtain reduce energy loss in a freezer door?

The E-402 Freezer² uses two flexible curtains separated by an air gap. That trapped air acts as an extra insulating layer, giving the curtain a thermal transmittance of 1.4 W/m²K (tested to EN 12428).

Less heat crosses the door, so the temperature inside the freezer stays more stable and refrigeration units work less. The insulated outer layer also keeps the curtain surface warmer, which lowers the risk of frost building up on it.

Speed matters just as much as insulation. With an opening speed of up to 2.0 m/s, the door is open only as long as traffic needs it, limiting the exchange of warm, humid air and cold air.

Flexible curtains separated by an air gap

How does the E-402 Freezer² prevent ice and condensation?

Ice is the main reason freezer doors fail. The E-402 Freezer² tackles it at three points:

1. Heated side guides and frame. Heating cables run through the side guides and frame to prevent frost damage and keep the curtain sliding smoothly.
2. Heated drive. The motor is heated as standard. A heating element for the control box is available as an option for environments below -20 °C.
3. Integrated air blower and air dryer. When the door is closed, the blower creates an extra air barrier between both environments. Combined with dry air, this limits condensation where warm and cold zones meet.

The result is a door that keeps running in continuous freezer operation, with fewer stops for de-icing and maintenance. 

Integrated air blower and air dryer

Built for heavy traffic: self-reinsertion and safety

Self-repairing curtain. If a forklift or pallet truck hits the door, the curtain is pushed out of its side guides instead of tearing. It then reinserts itself automatically on the next cycle, with no technician needed. Dynaco invented this crash-forgiving principle.

Gravity-driven closing. Weights in the bottom edge let the curtain close smoothly and in a controlled way.

Safety as standard. A dual multibeam light curtain (IP67) monitors the full width of the opening and stops and reverses the door when it detects a person, vehicle or obstacle. A double anti-jamming sensor is also included, and a microwave radar is available for automatic opening.

Proven durability. The door is tested for 1,000,000 cycles and passes EN 13241-1 tests for safe openings, mechanical resistance and unintended movements.

Where is the E-402 Freezer² used?

The door is designed for any interior opening where a frozen zone meets a chilled or ambient one:

• Freezer rooms and blast freezers
• Cold-storage warehouses and refrigerated distribution centres
• Food processing plants
• Refrigerated logistics and cross-docking hubs

For wet or hygiene-sensitive areas, the frame, motor casing and control panel are available in stainless steel AISI 304. The curtain can also carry company logos, safety notices or zone markings.

Frequently asked questions

What is the lowest temperature the E-402 Freezer² can handle? The door is designed for operating temperatures down to -35 °C, with up to 40 °C difference between both sides of the door.

What is the difference between a single and a double curtain freezer door? A double curtain has two layers with an air gap in between. This adds insulation, reduces heat transfer and lowers the risk of ice forming on the curtain compared with a single curtain.

How fast does the E-402 Freezer² open? It opens at up to 2.0 m/s and closes at an adjustable 0.8 m/s.

What happens if a forklift hits the door? The curtain comes out of its side guides instead of breaking, then reinserts itself automatically. In most cases, no repair is needed.

What is the maximum door size? 4,500 mm wide by 5,600 mm high. The minimum size is 800 × 2,100 mm.

Does the door comply with European standards? Yes. The E-402 Freezer² conforms to EN 13241-1, with third-party certified test results for wind load, safe openings, mechanical resistance and thermal transmittance.

Is a stainless steel version available? Yes. The frame, roller, motor casing and control box can be supplied in stainless steel AISI 304, including a hygienic sloped control box design.

A freezer door that keeps working in the cold

The E-402 Freezer² brings Dynaco's self-repairing high-speed door technology to the coldest areas of a facility. Insulation from the double curtain, active anti-ice heating and fast cycles work together to cut energy loss and downtime.

Want to see how it fits your freezer opening? Use the Dynaco Public Configurator or contact our team for advice and a quote.