Industrial dual discharge air evaporators REDI–RBDI– RADI

Efficiency and stability for medium-to-large industrial cold rooms.

The industrial solution for processing rooms and cold rooms up to 1600 m³

In large industrial cold rooms and processing areas, where personnel operate alongside production lines and high volumes of fresh or frozen products, thermal loads change rapidly. Frequent door openings and continuous operations require a system that maintains constant conditions without interruption.

In these environments, traditional systems often lead to uneven cooling, particularly in rooms with high ceilings, shelving or physical obstructions. This creates an unstable microclimate that compromises product quality, yield and safety.

Furthermore, uneven air distribution puts greater stress on the system, increasing energy consumption and the frequency of technical interventions, all while navigating the growing regulatory complexity of modern refrigerants.

To meet these demands, Refteco has engineered the REDI-RBDI-RADI industrial dual discharge air evaporators. These units are designed to stabilize the microclimate in large spaces (from 150 to 1600 m³), ensuring uniform cooling throughout the work areas, optimizing energy consumption without compromising product quality or process safety.

Application areas

Food & Beverage
Processing rooms and distribution platforms
Industrial storage cold rooms
Air conditioning in production rooms

Advantages of REDI –RBDI–RADI dual discharge air evaporators

Uniform cooling across large volumes, thanks to the dual-discharge design and balanced airflow, cold distribution remains stable even in very large rooms (150 to 1600 m³) or those with significant ceiling heights.
High heat exchange and reduced frost formation: featuring coils with internally ribbed Ø16 mm copper tubes (REDI,RBDI) or Ø16 mm AISI 304 stainless steel tubes (RADI for NH₃) combined with high-thickness fins. The optimized fin spacing (4/6/7/8/10/12 mm) allows for efficient evaporation, better moisture management and fewer defrost cycles.
Long-term reliability: the tube suspension system eliminates direct contact with the frame, reducing vibrations and the risk of micro-leaks to ensure operational continuity even in harsh conditions.
Energy efficiency and quiet operation: equipped with balanced Ø500–630 mm AC/EC axial fans ErP compliant, and feature certified grids and thermal protection. The result is a constant air flow with low consumption and improved acoustic comfort.
Simplified maintenance and durability: built with a RAL 9002 powder-coated galvanized steel casing, AISI 304 stainless steel screws, and a hinged drip tray with stainless steel drain outlets for easy components access. Over 108 available configurations (HFC/HFO, CO₂, NH₃) for easy integration into both new or retrofit systems.

Technical specifications and models

Cooling capacity: 15 – 90 kW (SC2)
Fans: 1–5 axial fans
Fan diameters: 500 / 630 mm
Fin step: 4/6/7/8/10/12 mm
Compatible refrigerants:
- HFC/HFO (direct expansion – REDI)
- CO₂ (direct expansion – RBDI)
- NH₃ (pump – RADI)
Operating Pressures / Temperatures:
- HFC/HFO: PS 30 bar | TS –40 / +120 °C
- CO₂: PS 33 / 45 / 60 bar | TS –45 / +120 °C
- NH₃: PS 23 bar | TS –40 / +120 °C
Operating thermal range: –40°C / +20 °C
Available models: 108 total configurations (see technical table)

Options and customization

Casing in AISI 304 / 316L stainless steel
Stainless steel tubes and fins
Fins in epoxy coated aluminum or alloy AlMg
EC or ATEX fans
Hinged fan panels
Suction fans (downward discharge)
Defrost: electric, light electric, hot gas, hot glycol, water, combined
Protective coil treatment
Insulated drip tray
Drain outlet heaters
Fan isolator switches
Custom wiring for AC or EC fans

Warranty and compliance

Warranty: 24 months from date of shipment
According to:
- PED 2014/68/EU
- Machinery Directive 2006/42/EC
- Directive 2014/35/EU (Low Voltage)
- Directive 2014/30/EU (Electromagnetic Compatibility)

Data sheet

Logistic and production center

TALLINN

This project is relating to one of the largest retailers in the Baltic States. We have supplied some CO2 evaporators for dry expansion transcritical plant. The installation foresees positive and negative cold rooms for for preservation of fresh and frozen foods.

Distribution center

NOGAROLE ROCCA

For this project, we have supplied some CO2 evaporators for pump transcritical plant for positive temperature for preservation of fresh foods at +2 °C.

Unit coolers for fish fish processing room

Les Lucs sur Boulogne

For this project relative to cooling of a production room for the preparation of ready-cooked fish dishes, we have supplied one double flow evaporator with coil and casing fully in stainless steel AISI316L execution.