REF – RBF – RAF horizontal coil air evaporators

Maximum power and operational continuity for large cold rooms.

The industrial solution for uniform cooling in high-volume cold rooms

In large-volume cold storage rooms, the significant heights, presence of extensive shelving and the fast-paced operational flows of cold-chain logistics require a specialized approach. Handling large volumes of fresh or frozen products demands uniform air distribution and a cooling capacity capable of responding rapidly to variable thermal loads.

When air circulation is insufficient or the heat exchanger struggles to absorb the heat introduced, temperatures tend to stratify, frost accumulation increases and cooling cycles become longer. This results in higher energy consumption and direct impact on product quality.

Refteco has developed the REF – RBF – RAF horizontal coil air evaporators specifically for these large-scale volume industrial environments. Large-diameter fans, high-surface heat exchangers, and a durable structure ensure a stable microclimate and reliable operation even in the most demanding applications.

Application areas

Food & Beverage
Cold logistics and distribution platforms
Industrial cold rooms for storage of fresh and frozen foods
Large temperature-controlled environments

Advantages of horizontal coil air evaporators

Uniform cooling over large volumes: large diameter axial fans (Ø560-630-710-800–910 mm) and optimized shrouds maintain a constant airflow throughout the entire depth of the room, preventing temperature stratification.
High-efficiency heat exchange,: coils are specifically designed for different refrigerants (Ø12 mm copper for HFC/HFO and CO₂, Ø16 mm stainless steel for NH₃) with widely spaced fins to reduce pressure drops and limit frost formation.
Long-term structural reliability: the suspension system eliminates contact between the tubes and the frame, reducing vibrations and the risk of micro-leaks.This extends coil life and ensures continuity for systems operating without interruption.
Energy efficiency and service continuity, equipped with AC/EC fans featuring thermal protections, ErP-compliant anti-corrosion grids and effective defrosting systems even at low temperatures (water down to –30°C, hot gas, electric, hot glycol), ensure stable performance and regular cycles in all conditions.
Design versatility and easy maintenance, features a powder-coated galvanized steel casing and an AISI 304 stainless steel drip tray with a sealed, welded drain. Access points are designed to facilitate quick servicing. With a wide series of custom models and versions for HFC/HFO, CO₂ and NH₃, the series is easily adapted to both new installations and complex retrofits.

Technical specifications and models

Cooling capacity: 42 – 350 kW (SC2)
Fans: from 1 to 5 axials
Fan diameters: 560 / 630 / 710 / 800 / 910 mm
Fin step: 6/7/8/10/12 mm
Compatible refrigerants:
- HFC/HFO (REF – direct expansion)
- CO₂ (RBF – direct expansion)
- NH₃ (RAF – pump)
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: customized configurations

Options and customization

AISI 304 / 316L stainless steel casing
Stainless steel tubes and fins
AlMg alloy or epoxy-coated aluminum fins
High-efficiency EC fans
ATEX fans
Special high-pressure fans
Air streamer and shut-up
Gravity flap for defrost
Insulated drip tray
Protective coil treatment
Defrost: water / hot gas / electric / light electric / hot glycol
Fan ring heaters
Isolator switches
Custom wiring for AC and EC fan

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

Unit coolers and condensers for logistics center

Mosciano

For this project, we have supplied air coolers and low temperature CO2 evaporators that were installed in cold rooms for storage of fresh and frozen food.