Storage matrix

Enventus Rotors are available in matrix thickness of 100, 150, 200 or 250 mm, and are produced from diameters starting at approx., 250mm up to 5000mm. Any intermediate diameter size is possible in intervals of 10mm.

The construction of the storage matrix consists of alternating layers of flat and corrugated foil, which form a spiral from the center. This results in a defined structure of small triangular flutes. Efficiency and pressure drop of the rotor can be optimised by varying the height of the corrugated foil flutes. Embedded interior spokes, within the storage matrix, form an extremely rigid spoke and rim construction. In this way, a maximum mechanical stability of the storage matrix is achieved, holding the foil laminations together without any glue.



The Right Foil for all Applications

The Eurovent Certification defines 3 classes of rotary heat exchanger types:

Condensation Rotors – Non-hygroscopic (ST1)

The condensation rotor is a cost-efficient solution to recover heat and is suitable for standard applications in comfort ventilation. Humidity is only transferred in cases when the dew point of one of the air streams is reached during winter conditions.


Hygroscopic Rotors – Entalphy (STE1)

The hydroscopic surface of this rotor class supports humidity transfer. Typically used for standard applications in comfort ventilation systems to recover humidity during moderate temperature periods.


Sorption Rotor (HM1 molecular sieve 3Å)

The high performance desiccant coatings of the sorption rotor HM1 (molecular sieve 3Å) provide a maximum humidity transfer capacity for minimal Carry over. The high humidity efficiency is constant throughout all climate conditions. Sorption rotors are especially designed for summer season cooling recovery and dehumidification of supply air. Therewith, it should always be used in humid and hot climates, with dry cooling systems (chilled beams) and when in winter time humidifiers are used. This substantially reduces the cooling and humidification demand of the HVAC system. More..


For special applications, other suitable material types are available:

Increased rigidity (AK2)

Under extreme strain, for example, applications with automatic cleaning devices using high pressure water in industrial equipment, we suggest a minimum foil thickness of 100 micron.


Increased corrosion protection (STC,AK)

In an environment with aggressive components in the air it is either recommended to use a rotor with epoxy coating (STC1) or a sea water corrosion resistant foil (AK) for better corrosion protection. Such applications can be, e.g. dairy industry, on ships or for coastal areas. Other applications for additional corrosion protection are adiabatic cooling and cooling rotors of Direct Evaporative Cooling (DEC) units.


Sectorised Rotors, Divided casing

Large rotors need to be sectorised for the reasons of transport, stability and insertion into a building. The storage matrix is split into segments which need to be installed inside the divided casing at the final site.