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Air coolers / Evaporators

Highly efficient, compact air coolers with a flat design


HFC, A2L/A3  |  CO2  |  Water, Brine

  • High-performance air cooler for commercial cooling and deep freezing requirements
  • Particularly suitable for packaged goods, supermarkets and CO2 applications
  • Modular air cooler range, flat design for higher stacks and large width for fewer lateral dead zones in the cold room
  • FHVT with efficient, functional defrosting process
  • Energy-saving motors and EC fan technology for the best energy efficiency classes as standard


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Top class high-performance air cooler


The FHV high-performance air cooler is particularly suitable for cooling and deep freezing requirements in the field of commercial cooling. Its particularly compact design together with the wide range of accessories and options, its efficient defrosting process and its compatibility with the coolant CO2 make it ideal for use in a wide range of commercial situations.

Product benefits

Your advantages at FHV/FHVT

Robust heat exchanger coil

for cleaning using e.g. a high-pressure cleaner


for quiet, energy-efficient operation


for increased air throw in longer cold rooms (optional)

Hinged pan

Hinged inner and outer pan for easy cleaning purposes (as standard)

Swivelling fans

for better access allow more thorough cleaning of the heat exchanger (optional)

Corrosion protection

various types of heat exchanger corrosion protection for use in aggressive environments


Electronic e-valve and superheat controller for efficient, safe operation and quick commissioning (optional)

75% lower defrost energy cost

Air cooler defrost concept to reduce the defrost frequency to up to one defrost a day and save up to 75% energy costs

CO2 freezer applications with large maturing surface


  • Fewer defrost cycles for more energy efficient operation
  • 12mm fin spacing with 9.52mm tube diameter
  • 0.3 mm thick fin withstands even increased mechanical loads

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All product advantages at a glance


  • Cooling capacity from 1 to 19 kW
  • Temperature range: FHV: 0 – 40 °C / FHVT: -30 – 40 °C
  • Fin spacings 4 / 6 / 7 / 12 mm 
  • Defrosting: electric, optional: Brine, hot gas, water sprinklers
  • Heat exchanger coil for an operating pressure of 25 bar/ 80 bar with CO2
  • Specially designed heat exchanger for special temperature ranges: Air conditioning, deep freezing

Easy assembly

  • Large spaces on the side of the housing allow easy installation of pipes and valves 
  • Easy access via side doors, completely removable
  • Flat stainless steel hanging rails
  • Connections with threaded nipple, ventilation and drain valve (water or brine mode)
  • Drain heating can easily be retrofitted
  • Fan and heating rods wired to terminal box
  • Defrost heating for coil can easily be retrofitted, MS heating rods

Inspection & cleaning

  • Double drip pan construction prevents condensation forming on the underside of the tray
  • Side doors, completely removable
  • Generously sized condensation drains
  • Aligned tube pattern and fin spacings of up to 12 mm for easy cleaning
  • Constructive properties geared to the HACCP concept
  • Baffle plate to prevent condensation forming on the housing
  • Thick fins (0.3 mm) for extra stability during cleaning
  • Drip pan and inner pan hinged as standard to allow cleaning 

Airflow routing

  • Increased air throw with optional streamer
  • Special fans with particularly high external pressure (option)
  • Special fans for three-phase 400 V


Energy efficiency

  • High-performance heat exchanger with aligned tube system for minimal pressure losses on the air side and large surfaces
  • EC fans for energy-efficient, quiet operation as standard 
  • Large heat exchanger surfaces for reduced moisture loss and defrosting
  • Adjustment of the air volume flow according to the cooling load via external controller (0 – 10 V or 4 – 20 mA or Modbus signal with EC fans)
  • Infinitely adjustable speed control (50-100%) using optional plug-in module for ESM+ fans
  • Defrost damper and defrost hood (accessories) for efficient, quick defrosting
  • ERP compliant fans
  • Air cooler energy efficiency class up to top mark  "A" 

Corrosion protection

  • Corrosion-resistant powder-coated aluminium housing
  • Fully lacquered heat exchanger with dual component lacquer or powder-coated (optional)
  • Stainless steel housing (optional)
  • Copper fins as corrosion protection (proximity to the sea)
  • All corrosion protection variants at a glance


  • Heating rods arranged to achieve the best possible heat distribution and reliable defrosting, in aluminium housing to prevent vapours
  • Textile defrost damper to isolate the air cooler on the pressure side during defrosting (accessory)
  • Defrost safety thermostat interrupts electric defrosting if the defrost control system (accessory) malfunctions
  • Frame heating for electrically heating the fan ring and to avoid ice bridges during defrosting (accessory)
  • Defrost hood: Uses trapped heat and helps with defrosting in the air cooler
  • Defrosting using brine circuit
  • Hot gas defrosting for the heat exchanger 
  • MS heating rods for flexible defrosting at temperatures around freezing point - retrofittable!

Air cooler with upward connections

The pipes are usually routed inside the cold room either along the cold room ceiling or directly upwards through the cold room ceiling.

For the latter, there is an alternative option at Roller to get the rising pipe inside the unit directly from the factory. This aesthetic internal pipe arrangement, which cannot be seen from the outside, among other things offers hygienic advantages with regard to on-site pipe insulation. In addition, the factory pre-fitting makes on-site doing a much simpler job. And most importantly, there is no disturbing pipe outside the evaporator housing that could be damaged, for example, when refrigerated goods are charged.


Information on product extension from April 2022


Roller extends modularity of FHV/T air cooler series

On 1 April 2022, Roller will be adding further variants to its FHV/T modular air cooler series, which has been established for many years. This page provides a detailed list of all product supplements for you. The new modular combinations can be configured in the new version of the selection software from 1 April 2022.


You will find all details here!



Find suitable accessories for the FHV/FHVT

MS heating rods

for coil defrosting tR >0 °C - can be retrofitted

High-performance heat exchanger

for CO2 refrigerant up to 80 bar

Textil hose connection including straightener

for an increased air throw and streamlined air flow

Auxiliary heating

for condensation drain

Heated drip tray

to easily drain away condensation in low-temperature storage rooms

Textile hose connection

for the easy installation of textile hoses for uniform air distribution without draughts

Defrost hood:

less warming of the room owing to defrost heat, optimized defrosting process

Air filter grille

for on-site use of air filters in the air intake (15 mm thickness)

Additional accessories

  • Built-in electronic Carel expansion valve with EVD ice superheat controller
  • Installation brackets for wall mounting
  • Defrost damper: To isolate the fan on the pressure side during defrosting
  • Swivelling fans


Bakery cooling - FHV - Biaggini

For the daily fresh baked goods in the bakery displays, sophisticated refrigeration technology is required in particular to meet the requirements of the variety of different baked goods. Fast freezing times, small temperature differences, air distribution and humidity control during storage add complexity to the task. For careful conditioning of sensitive bakery goods, the focus of evaporators is on the largest possible heat exchanger surface area with low dehumidification. For the conversion of one of the largest bakeries in Switzerland, Biaggini installed a CO2 refrigeration system with 250 kW cooling capacity, including heat recovery, air conditioning, and humidity control in the cold rooms. Biaggini relies on the reliable technology of Roller FHV air coolers when it comes to cooling the refrigeration and deep-freeze chambers.


ApplicationCommercial Refigeration

Butchery cooling - DHN/FHV - Biaggini

High-quality meat and sausage products have a long tradition in the canton of Ticino (Switzerland), and preparation is still done with great passion. That's why these specialities are a real treat for the palate. In addition to the good ingredients and the know-how, the appropriate equipment is of course also required for the perfect result. The butcher's shop Bozzini in Biasca has invested in advanced refrigeration and counter technology and commissioned Biaggini to equip the refrigeration systems. The technology behind the attractive salesroom is all made by brand-name manufacturers. The DHN ceiling-mounted air cooler was chosen for hygienic and draught-free operation in the cutting room. In the two cold rooms, Biaggini relies on the tried-and-tested FHV cubic Roller air coolers, which not only ensure the correct temperature control but also the high quality of the chilled goods.

ApplicationCommercial Refrigeration
AddressBiasca / Swiss
ProductDHN & FHV

Supermarket cooling - FHV - Migros Mendrisio

The Biaggini company from Cadenazzo in Switzerland has been using the natural refrigerant R 744 in its refrigeration systems for many years. At this Migros supermarket, the CO2 compound system technology customary in commercial refrigeration was installed for the operation of several cold rooms in normal and deep-freeze mode. The shop's new refrigerated cells were also part of the shop's modernisation plans. Biaggini decided to use the well-proven CO2OLER evaporators as ceiling air coolers DLK, as well as flat-cubic FHV from Roller, which provide reliable and energy-efficient service.

ApplicationSupermarket cooling
AddressMendrisio / Swiss
ProductFHV and DLK

Fruit/vegetable cooling - FHV - PJ Koleteknik


In this project, the company PJ KØLETEKNIK in Denmark is expanding an existing cold store to include a fruit and vegetable store and is relying on the performance and reliability of Roller's FHV cubic air cooler.

ApplicationFruit/vegetable cooling
AddressFredericia / Denmark

Blast freezing - FHVT - Leutwyler

Blast freezing is about cooling pre-cooled or fresh goods to temperatures of minus 20 degrees Celsius or colder for a short time. For this, high cooling capacities, air volumes and uniform air distribution are of great importance. Leutwyler Kühlanlagen AG implemented all three aspects in the construction of this blast freezer cell at a food processor of soups and farm products in Jona, Switzerland, using Roller FHVT air coolers for CO2 operation.

ApplicationBlast freezing
AddressSwiss / Jona

Meat processing - FHV - Terrani-Schweiz

At a meat processing company such as Terrani Carni, the cutting rooms and temporary storage rooms are part of the production chain and need to be cooled. Constant temperatures, hygienic operations and draught-free working are the typical demands placed on the air coolers in such areas. The Swiss plant contractor Biaggini relies on quality products from Roller.

ApplicationMeat processing
AddressSorengo / Swiss

Potato warehouse - FHV - Berchtold

Potatoes that are stored for a longer period of time start to sprout. This process can be delayed by chemical treatment (powdering) or cooling. Since powdering has been banned in Switzerland, the direct marketer decided to cool his stored potatoes. Berchthold Kältetechnik installed a refrigeration system with two Roller FHV evaporators paired with a Silensis outdoor unit in the approx. 50 sqm hall.

ApplicationFruit/vegetable cooling

Technical data

All important technical data at a glance

Product name FHV...EC FHVT..EC
Capacity range 1 - 19 kW 1- 19 kW
Temperature range 0 - 40°C -30 to 40 ̊C
Defrost heater without Block and drip tray
Tubes Internally grooved Internally grooved
Tube system Aligned Aligned
Number of fans 1 - 6 1 - 6
Fan typ EC / Suction / IP 54 EC / Suction / IP 54
Fan size 250 / 300 / 450 mm 250 / 300 / 450 mm
Fin spacing 4 / 6 / 7 mm 4 / 6 / 7 / 12 mm
Energy efficiency class A to C A to C


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Tel.: +49 (0) 7156 / 2001-30