Rotary heat exchangers designed for the transfer of heat and humidity with a unique hygroscopic layer consisting of 4Å – ZEOLIT molecular sieve.

The latest technology for transfer of humidity designed for rotary heat exchangers. A special synthetic Zeolite layer applied on the aluminum carrier benefits from the latest findings in the field of nanotechnology. The main advantage is the clearly defined molecular structure. Zeolite layer transfers water steam molecules while preventing from sorption and transfer of odor and VOC (volatile organic compounds) molecules. Healthier environment at construction sites = 4Å – ZEOLITE molecular sieve

Main benefits

  • High efficiency of humidity transfer (up to 90 %)
  • No odor and VOC transfer
  • Lower cross contamination risk (carry-over effect)
  • Reduced costs for moistening
  • Lower risk of rotor freezing
  • Lower pressure loss
  • Antimicrobial properties
  • Healthier and cleaner inner environment at construction sites

Zeolite – a natural substance

In past the most frequently used material for rotational heat exchangers with transfer of humidity was silica gel.

With its unique structure, 4Å – ZEOLITE molecular sieve now replaces silica gel completely.

In natural environment Zeolites are present in the form of microporous aluminosilicate minerals with a characteristic 3D porous structure – channels and cavities of constant dimensions. The technology by KASTT makes use of the molecular sieve with an efficient diameter of 4 Å (Ångström = 10-10 m). Zeolites of such a diameter absorb the water steam molecules with a critical diameter of 3,2 Å. The size of commonly occurring odors and VOC is 7 Å or more. Therefore the sorption of these unwanted substances is completely excluded with this technology.