Plate counter-flow heat exchangers

Series НС-ЕХ6


The НС-ЕХ6 / Combi НС-ЕХ6 counter-flow heat exchangers are specifically developed for heat recovery in balanced ventilation systems. These heat exchangers allow efficient use of extract air energy for heating or cooling, thus optimizing ventilation and providing healthy indoor climate.

Due to the unique heat exchanger design and the shape of the heat exchanging plates the heat exchange surface is maximized and the pressure losses are minimized. This heat exchanger type is compatible nearly with all ventilation systems.

The supply and extract air streams move in opposite directions toward each other. The heat energy is transferred through the thin plates. Heat recovery efficiency exceeds 90 %.


• The heat exchanger has a hexagonal shape with the overall dimensions of 366×366 mm, 230×455 mm, 232×461 mm, 394×619 mm and 533×758 mm (length and width). The maximum depth is 600 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 air channels. The extensional channels in the plates are parallel located. The air streams move in the channels and do not get mixed.

• The distance between the plates of 2.6 mm provides combination of the maximum efficiency with the lowest pressure loss.

  • Heat exchangers in the «Combi HC-EX6» design consist of two heat exchangers of the same size installed in parallel, assembled in one monolithic casing made of high-quality aluminum alloy 5754, which provides maximum corrosion protection in a humid environment. Counter-flow air streams pass simultaneously in parallel through two heat exchangers distributed at the entrance to the blocks.
  • In this design are made:
     – «Combi HC-EX6 815/…-3» consists of two «HC-EX6 394/…-3»
     – «Combi HC-EX6 1089/…-3» consists of two «HC-EX6 533/…-3»
  • The distance between the plates is standard – 2.6 mm. The maximum depth of the heat exchangers is 600 mm.
  • Domestic ventilation units
  • Heating and air conditioning systems
  • Full separation of air streams
  • Heat recovery in winter
  • Cool recovery in summer
  • Premises with no air circulation
  • School premises
  • Office buildings

Air sealing process is automated.

High-quality hot-melt synthetic-base polymer adhesive used in food and pharmacy industries provides air tightness.

  • The heat accumulating mass is 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 performance characteristics.
  • All the casing components can be made of:
    – high-quality aluzinc plates;
    – impact-resistant polystyrene;
    – high-strength aluminum alloy.

Basic modification «Standard». HC-EX6

The heat exchanger plates are made of polystyrene.

Compatible with the sizes 366×366 mm, 230×455 mm, 232×461 mm.


Version 1. Aluzinc casing

The casing components are made of high-quality aluzinc plates.

This modification is used for the size 230×455 mm only.

Version 2. Plastic casing

The head plates, side plates and the profiles are made of impact-resistant polystyrene.

This modification is used for the sizes 366×366 mm and 232×461 mm.

Version 2.1. Plastic casing with T-profile

All the casing components are made of impact-resistant polystyrene. T-profile is used instead of a standard profile. This profile is used in case of a special mounting in the air handling unit.

This design is applied only for the size 366×366 mm.

Version 3. Aluminum casing

The casing elements are made of high-quality aluminum alloy, which provides maximum protection against corrosion.

This type of casing is used for the sizes 394×619 mm, 533×758 mm, as well as assembled polyblocks 815×1040 mm and 1089×1314 mm.

NameOverall dimensions [mm]PolystyreneCasing modification
НС-ЕХ6 366/…366х366+2 / 2.1
НС-ЕХ6 230/…230х455+1
НС-ЕХ6 232/…232х461+2
HC-EX6 394/…394×619+3
HC-EX6 533/…533×758+3
Combi HC-EX6 815/…815×1040+3
Combi HC-EX6 1089/…1089×1314+3

Serial installation of several heat exchangers on counter-flow basis increases the heat recovery efficiency.


• The HC-EX6 counter-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.

  • 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 humidity 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.
NameA: width [mm]B: height [mm]C: depth [mm]x: casing modification
НС-ЕХ6 366366366100…6002 / 2.1
NameA: width [mm]B: height [mm]C: depth [mm]x: casing modification
НС-ЕХ6 230455230100…6001
NameA: width [mm]B: height [mm]C: depth [mm]x: casing modification
НС-ЕХ6 232461232100…6002
NameA: width [mm]B: height [mm]C: depth [mm]x: casing modification
HC-EX6 394619394100…6003
NameA: width [mm]B: height [mm]C: depth [mm]x: casing modification
HC-EX6 533758533100…6003
NameA: width [mm]B: height [mm]C: depth [mm]x: casing modification
Combi HC-EX6 8151040815100…6003
NameA: width [mm]B: height [mm]C: depth [mm]x: casing modification
Combi HC-EX6 108913141089100…6003
HC-EX6 B / C - x
Combi HC-EX6 B / C - x

HC-EX6 – commercial group
Combi HC-EX6 – commercial polyblock group
B: height [mm]: 366/230/232/394/533/815/1089;
C: depth [mm]: 100…600;

x: casing modification:
• 1: aluzinc
• 2: plastic with a standard profile
• 2.1: plastic with a T-profile
• 3: aluminum

*A: width [mm] 366/455/461/619/758/1040/1314 not indicated in the heat exchanger name.