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.
