Cross-flow heat exchangers
75%
Efficiency
ZERN ENGINEERING cross-flow heat exchangers combine a compact footprint with strict separation of supply and exhaust air, delivering dependable energy recovery. Available in two options - sensible (polystyrene plates) for heat-only recovery and enthalpy (aluminum with a vapor-permeable membrane) for combined heat and moisture recovery - they integrate easily into decentralized HRV/ERV units and AHUs.
Product categories
Types and variations
Sensible cross-flow heat exchangers
Series:
Hp-EX4
Polystyrene plates for applications requiring temperature-only recovery - dry zones, dehumidifiers, or sites needing absolute humidity separation.
Enthalpy cross-flow heat exchangers
Series:
E-EX4
Aluminum foil with vapor-permeable membrane for heat + moisture recovery - ideal for residential and light commercial comfort control.
Combi cross-flow heat exchangers
Series:
Combi Hp-EX4, Combi E-EX4
Multi-core assemblies that scale airflow for larger systems while keeping pressure drop low.
Key operational parameters
Performance сharacteristics
Airflow range
Standard 50–3,500 m³/h; Combi versions scale >6,000 m³/h
Thermal efficiency
Up to 75% under optimal conditions.
Humidity efficiency
Up to 65% under optimal conditions.
Pressure drop
Typically, 40–130 Pa (depends on air flow, plate spacing & core size)
Operating temperature
−25 °C to +50 °C
Technical features
Design and structure
Principle of operations
In cross-flow exchangers, supply and exhaust airstreams pass perpendicularly through separate thin channels formed by layered polystyrene plates or aluminum plates laminated with a vapor-permeable membrane. The 90° crossing maintains a strong local temperature, and with membrane cores, moisture, gradient across the plate walls while keeping the streams fully separated—delivering efficient energy recovery in a compact, low-profile core.
- Sensible models: transfer heat only.
- Enthalpy models: transfer both sensible and latent heat and moisture, while blocking dust, dirt, odours, CO₂ and other gases.
Core material
Stacked cross-flow cores use either thermoformed polystyrene plates (sensible) or aluminum plates laminated with a microporous vapor-permeable membrane (enthalpy), forming fully isolated, tightly packed channels that provide high heat-transfer surface area with low airflow resistance; the materials are corrosion-free, hygienic, and washable, with the membrane variant enabling controlled moisture diffusion while blocking gases and contaminants.
Casing materials
- Polystyrene (HIPS) — lightweight, insulated; ideal for compact residential units.
- 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.
Most suitable option
Applications
- Residential buildings — apartments, multi-family housing, private homes.
- Commercial facilities — offices, shopping centers, schools, cultural institutions.
- Industrial systems — production halls, warehouses, logistics complexes.
- Hotel and wellness sector — hotels, fitness centers, swimming pools.
- Public spaces — airports, stadiums, exhibition halls, transport hubs.
Product catalog
More information
Discover ZERN ENGINEERING’s full range of heat exchangers. Our product catalog provides detailed specifications, material options, and performance data to help you select the optimal solution for any application