Polystyrene plate cross-flow heat exchangers

Series Hp-EX4

  • Hp-EX4 plate heat exchangers are highly efficient heat exchangers that allow to save and reuse thermal energy of air flows, which qualitatively increases the efficiency of the system itself. The cross flows of extract and supply air are separated by the walls of the heat exchanger plates, which prevents the transfer of contaminants, dust particles, moisture, etc. from one flow to another.
  • Heat transfer efficiency is up to 80%. It is achieved due to the unique design and shape of the heat exchanger plates, in the stack of which heat exchange takes place. The use of polystyrene as a plate material allows for maximum heat transfer compared to similar aluminum plates.
  • The heat exchanger has a square shape with the overall dimensions of 200×200 mm, 250×250 mm and 300×300 mm. The heat exchanger depth is from 100 up to 400 mm.
  • The heat exchanger consists of a heat accumulating mass (a set of plates) and a casing. The assembled and interconnected plates build a heat
    exchanging stack with many air channels. The air channels are crossed at 90° angle. The two air streams moving in the air channels do not get
  • The distance between the plates of 2.4, 2.7 or 3.0 mm provides combination of the maximum efficiency and the lowest pressure differential.
  • Heat recovery in winter and cool recovery in summer
  • Heating and air conditioning systems
  • Ventilation of premises
  • Separation of air streams
  • Heat removal in control boards
  • Air sealing process is automated.
  • High-quality hot-melt synthetic-base polymer adhesive used in food and pharmacy industries provides air tightness.
  • The heat exchanging plates are made of special impact-resistant polystyrene with the thickness of 0.2 up to 0.3 mm. This material is featured with high thermal conductivity and high performance characteristics.

  • All the casing components are made of impact-resistant polystyrene.

Plastic casing designs are available for this heat exchanger series.
Version 2. Plastic casing

The head plates and profiles are made of impact-resistant polystyrene. The upper head plate is supplied with a transport polypropylene holder.

The dimensions of the heat exchangers in this casing are 200×200 mm, 250×250 mm and 300×300 mm.

Version 2.1. Plastic casing with T-profile

The head plates and profiles are made of impact-resistant polystyrene. The upper head plate is supplied with a transport polypropylene holder.

T-profile with an inner extensional groove is used instead of a standard profile in case of special mounting in a mounting seat of an air handling unit.


Several Hp-EX4 cross-flow plate heat exchangers can be installed in series or connected to modular units with the size of face up to 1000×1000 mm.

  • The applied materials enable operation, storage and transportation of the heat exchangers in the temperature conditions from -25 up to +50 °C. Storage of heat exchangers in an exposed position in direct sunlight is forbidden.
  • In winter season the air moisture is condensed on the heat recovery plates and the condensed water freezes at the temperature of -5 °C and
    lower. Heat recovery efficiency during these temperature conditions is slim to zero. Avoid condensate freezing on the heat exchanger plates.
  • The Hp-EX4 cross-flow heat exchangers have no movable parts and metal connections, therefore no mechanical maintenance is required.
  • Slight contaminations are eliminated by compressed air jets or flushing with warm mild detergent solutions.
NameA: width [mm]B: depth [mm]h: distance between plates [mm]x: casing modification
Нp-ЕХ4 200200100…4002,42/2.1
Нp-ЕХ4 250250100…4002,72/2.1
Нp-ЕХ4 300300100…4003,02/2.1
Hp-EX4 A / B / h - x

Hp-EX4 – commercial group
A: width, length [mm]: 200/250/300;

B: height [mm]: 100…400;
h: distance between plates [mm]: 2.4/2.7/3.0;

x: casing modification:
• 2: plastic
• 2.1: plastic with a T-profile

Sales department

Please contact us in case of any questions:

HQ Tel. + 49 89 231 66 620 *multichannel HQ Fax. + 49 89 780 69 521 sales@zern-engineering.com

Contact Us