CROSS-FLOW HEAT EXCHANGER
The BOIXAC crossflow heat recovery unit is a high-efficiency solution for thermal energy recovery in clean air applications, specifically designed for industrial HVACR systems and processes where air quality and absolute separation between air streams are critical.
Thermal energy recovery for clean air in HVACR systems and industrial processes
Based on a high-performance parallel plate architecture, this type of heat recovery unit enables efficient heat transfer between two completely separated air streams, with no mixing or cross-contamination, ensuring hygienic safety, operational reliability and high energy performance.
The plate-type crossflow heat recovery unit is intended exclusively for clean or lightly loaded air streams, where no significant fouling or adherent particles are present.
Advanced energy efficiency optimized through CFD
BOIXAC crossflow heat recovery units are designed using advanced thermal simulation and Computational Fluid Dynamics (CFD), optimizing the balance between:
Heat transfer coefficient
Homogeneous airflow distribution
Minimal pressure drop
This approach makes it possible to achieve energy efficiencies of up to 90% under clean air conditions, positioning this technology among the most efficient solutions for energy recovery in controlled HVACR environments.
Heat exchanger for clean air preheating
The BOIXAC crossflow heat exchanger is designed for the preheating of clean outdoor air, recovering energy from exhaust air, provided that it does not contain fouling or contaminants requiring mechanical cleaning.
This solution allows:
Immediate reduction in heating or air-conditioning energy consumption
Improvement of overall HVACR system efficiency
Compliance with strict hygienic and sanitary regulations
Guaranteed total separation between air streams
Modular engineering and intelligent design focused on clean air
The BOIXAC crossflow heat recovery unit is based on modular and fully customized engineering, adapted to:
Constant or variable airflows
Controlled temperature ranges
Limited available space
High hygienic requirements
Depending on the project, the units can incorporate:
Custom modular designs
Airflow reversal systems
Industrial support structures
Due to its plate architecture, the crossflow heat recovery unit is not suitable for air streams with high fouling levels, as it does not allow deep mechanical cleaning of the heat exchanger core.
This characteristic is essential to ensure correct technology selection and to avoid inappropriate applications.
High-grade materials for demanding hygienic applications
BOIXAC plate-type crossflow heat recovery units are manufactured using materials selected for clean air and controlled environments:
AISI 304 stainless steel
AISI 316L stainless steel
AISI 316Ti stainless steel
AISI 321 stainless steel
Industrial aluminium and special aluminium alloys
These materials ensure durability, resistance to mild corrosion and compatibility with hygienic environments.
Crossflow plate heat recoverer
The BOIXAC crossflow heat recovery unit is particularly suitable for:
Large collective dining facilities and industrial kitchens (filtered air)
Hospitals, clinics and laboratories
Food and beverage industry with clean process air
HVACR systems in industrial and tertiary buildings
It is not suitable for combustion gases, dirty fumes or air streams containing adherent particles.
Key technical details of the plate heat exchanger
Hygiene, inspection and durability
The design facilitates visual inspection and preventive maintenance in clean air applications. System durability depends directly on proper application selection, avoiding fouling air streams.
Optimized thermal corrugation
The plates feature a smooth, optimized corrugation designed to maximize heat transfer while maintaining minimal pressure drop, exclusively under clean operating conditions.
Typical ROI
3-12 months
Efficiency
up to 80%
Warranty
2 years
Design
modular and custom-made
FAQs
What is a crossflow heat recovery unit?
It is a heat exchanger for clean air that transfers thermal energy between two separated air streams without mixing them.
It operates using heat exchange plates that recover heat from clean exhaust air to preheat outdoor air, while maintaining complete physical separation between air streams.
Is a crossflow heat recovery unit suitable for dirty gases or fumes?
No, it is not suitable.
Due to its plate architecture, this type of unit does not allow deep mechanical cleaning and is therefore not suitable for heavily fouled gases, solid particles or adherent contaminants.
What type of air is suitable for this technology?
Clean or filtered air.
It is ideal for HVACR air, sanitary exhaust air or clean process air, where there is no risk of dirt accumulation on the plates.
What efficiency can it achieve?
Up to 90% efficiency.
High efficiency is achieved through CFD-optimized airflow and plate geometry, provided that the air is clean and design conditions are maintained.
What is the typical ROI?
Between 3 and 12 months.
Immediate energy savings in continuously operating HVACR systems allow rapid recovery of the initial investment.
Technical conclusion
The BOIXAC plate-type crossflow heat recovery unit is a highly efficient solution for energy recovery in clean air applications, but it is not a universal technology. Correct application—clearly differentiated from other technologies such as tubular heat exchangers for fouled gases—is essential to ensure performance, durability and return on investment.
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Ambient air preheating
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