Total Heat Exchanger

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Highlights of HI-PANEX-ION ~Advanced by Ion Power~

Silica Gel

Silica Gel has micro pores ranging from 3 Angstrom to 100 A and very high adsorption capacity. Not only does it adsorb water molecules (moisture), but it also adsorbs odor molecules because of its strongly hydrophilic characteristic.

Molecular Sieves

Molecular sieves are crystalline metal aluminosillicates having a 3 dimensional interconnection network of silica and alumina tetrahedra.
Natural water from hydration is removed from this network by heating to produce uniform cavities which selectively adsorb molecules of a specific size.
Although typical molecular sieves, like molecular Sieve Type A or X, have lower adsorbability of water molecules than Silica Gel, they adsorb similar sizes of odor molecules (e.g. Ammonia).

Ion Exchange Resin ( IER )

★Our Epoch-making Ion Adsorption Type Total Heat Exchanger!

  • IER, unlike silica gel or molecular sieves, does not have “pores” and yet has internal storage capacity.
    This resin is similar to materials that have been used in reverse osmosis water treatment plants for years.

  • Water vapor is selectively attracted to and held to the resin surface by ionic bonds at multiple sites of either +/- or-/+ orientation.

    The co-polymer swells as it is wetted by the adsorbed water. This swelling closes off any gaps between the dehydrated co-polymers. As a result, a series of crevice like openings which form the adsorption“pathway.”

    Osmotic pressure (similar to partial vapor pressure differential) draws the water molecule through the membrane like surface of the IER. Other molecules of a larger kinetic diameter are blocked and not internally adsorbed.

Seibu Giken HI-PANEX-ION rotor has the loweset co-adsorption coefficient in the industry.

It is even lower than 3A molecular sieve!! We succeed to pursue real IAQ improvement with HI-PANEX-ION.


・ Take a glance of our publications and papers!
“A Novel Total Heat Exchanger with Little Odor Transfer Using Ion Exchange Resin as a Desiccant” in 2001 ASHRAE Paper

・ Evaluation paper on HI-PANEX-ION by Mr. Akio Kodama, neutral, fair and third party(School of Mechanical Engineering, College of Science and Engineering, Kanazawa University)

Submit a request form if you need full text of above papers.

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Operation Principles

Function of the total heat exchanger in air-cooling

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Function of the total heat exchanger in air-warming

A heat wheel roters through the ventilation air and the exhaust air over and over on a continuous basis.Thermal energy and water vapor are transferred from the high side to the low side or from “hot to cold” and from “wet to dry.”

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Advantages and Special Features


  1. 1. Best solution for cross contamination
  2. 2. Minimal air leakage
  3. 3. Excellent energy saving effect especially for long summer/winter season areas
  4. 4. More value-added features

    5.“Easy” retrofits and replacements due to our rotor construction

  5. 6. Certified by Eurovent and AHRI*

      AHR is Certified for only enthalpy wheels

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Maintenance support available!
Retrofit your air conditioning system.

Overseas Sales Department

Please contact us if further information is required.


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