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Heat exchangers, air coolers and fan coils
for advanced applications



Welcome to the world of Heat Exchanger

Together with you we develop customized heat exchangers, air coolers and fan coil units for your refrigeration requirements.
Either as standard equipment or system-specific as a system solution.
Walter Roller offers the optimal solution for every capacity range and every application in refrigeration technology with its wide range of heat exchangers and air coolers.


Future-safe air coolers

Producing and installing future-safe products is a particular challenge for manufacturers, plant engineers and operators against the background of rapidly changing market situations and legislation.
Roller air coolers today already meet the high requirements in terms of energy efficiency, use of environmentally friendly refrigerants, but also the qualitative aspects of corrosion protection and hygiene regulations.


Heat exchanger and air cooler with up to 12 mm fin spacing

If the fin spacing is too small, there is a high risk of frequent defrosting which is not very efficient.
The new Roller heat exchanger with 12mm fin spacing contributes to an increased energy efficiency of the entire system by reducing the number of necessary defrost operations.


Dual ceiling air coolers for industrial applications (DHNI)

The newly developed DHNI high-performance ceiling air cooler with two-way air discharge was specially designed for the demanding applications of industrial refrigeration and are particularly characterized by their low overall height combined with low internal volume.












Fan Coils Unit for CO2 up to 80 bar

CO2 compressor rack systems with air cooler installations in cold storage rooms are enjoying increasing popularity.
  • Adjacent sales rooms can now also be cooled with the same rack system.
  • With the proven HKN series, an A/C fan coil unit for use with CO2 is now available to cool adjoining sales, processing and office rooms.
  • The air conditioning unit is available with a capacity range from 1.1 to 15.6 kW and a maximum operating pressure of 60 or 80 bar, depending on the size of the unit.
  • By using EC motors with radial fans, the fan coil unit is not only particularly quiet and operates almost draught-free, but also contributes to the energy efficiency of the entire system.