Enthalpy cross-flow heat exchangers

Enthalpy cross-flow heat exchangers by ZERN ENGINEERING (E-EX4 series) are compact plate cores that recover both heat and moisture in small HRV/ERVs and decentralized units. A composite aluminum + vapor-permeable membrane core delivers stable performance, low pressure drop, and easy integration for applications where indoor humidity balance matters.

Key operational parameters

Performance сharacteristics

Thermal efficiency

Up to 70% under optimal conditions

Humidity efficiency

Up to 40% under optimal conditions

Pressure drop

Typically, 40–150 Pa (depends on air flow, plate spacing & core size)

Operating temperature

−25 °C to +50 °C

Air leakage

<1%

Maintenance

Durable, corrosion-free PS core; washable for long service life

Technical features

Design and structure

3D model

Principle of operations

Supply and exhaust air move perpendicularly (90°) through separate membrane-aluminum channels. Heat and water vapor pass through the microporous membrane, while gases, odors, and contaminants are blocked - providing effective recovery and hygienic air separation.

Core material

Corrugated aluminum plates laminated with a microporous polymer membrane, which ensures the transfer of sensible and latent heat, moisture diffusion and long service life.

Casing materials

Aluzinc steel - economical and corrosion-resistant for long-lasting performance.
Aluminum - lightweight, corrosion-resistant; good for humid sites.
Stainless steel (AISI 304/316) - for aggressive/hygienic sites.

Main areas of use

Applications

Residential ventilation - apartments, small homes, single-room ERVs.
Small commercial - shops, offices, classrooms.
Hospitality & care (non-sterile) - hotel rooms/corridors, clinics, patient areas.
Decentralized systems - compact, wall-mounted ERVs and facade units.

SIZES OF OUR HEAT EXCHANGERS

MODEL LINE

Dimensions A and B are fixed. Dimension C is the width of the heat exchanger and can be varied.
Each heat exchanger model can be manufactured with a depth (dimension C) ranging from 100 mm to 800 mm per unit.
Heat exchangers with a width of 800 mm and above are supplied as two or more units.

Series commercial group	Model	A width [mm]	В height [mm]	С depth [mm]	h plate distance [mm]	X casing modification
E-EX4	200	200	200	100-400	2.7 / 4.5	1
	250	250	250		2.7 / 4.5	1
	300	300	300		2.7 / 4.5	1

Decoding Product Specifications

Designation key

E-EX4

A

/

C

/

h

-

x

E-EX4

commercial group

A

width, length (mm)

C

depth (mm)

h

distance between plates (mm)

x

casing modification

1 - aluzinc