We offer a wide range of enthalpy heat exchangers for most heat recovery ventilation units.
If you can't find the right model, contact us – we'll be happy to help!
The foundation for high-tech heat recovery ventilation.
RECUBOX® HRV 250 VENT-READY TOP is designed for easy installation.
High-end AFL EC fans with CONSTANT FLOW technology.
RECUBOX® ERV 250 VENT-READY TOP is a compact enthalpy heat recovery unit ready for installation of AFL EC CONSTANT FLOW fans. The TOP version, with all four duct connections pointing upwards, saves space and makes it easier to connect the ventilation ductwork above the unit. RECUBOX® provides an exceptionally durable, hygienic and versatile foundation for modern balanced heat and moisture recovery ventilation in family houses, apartments and smaller commercial buildings.
Custom-made in the Czech Republic. RECUBOX® units are manufactured entirely in the Czech Republic according to the customer's exact requirements. We use high-quality polypropylene materials from SIMONA AG and professional hot-gas welding technology using equipment from Leister AG.
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Every RECUBOX® is built as a carefully manufactured technical product – with emphasis on precision, airtightness, long service life and the possibility of adapting it to the specific installation.
Product image notice: The photographs are for illustrative purposes and may not show the exact version or selected RECUBOX® configuration being offered. The relevant technical drawings and diagrams are decisive for the specific design, dimensions and positioning of individual structural components.
The casing is structurally optimized for AFL EC CONSTANT FLOW fans, which provide an exceptionally intelligent solution for modern heat recovery ventilation. Thanks to the integrated Constant Flow function, the fans automatically respond to changes in system resistance and help maintain stable airflow, balanced ventilation, low noise levels and energy-efficient operation over the long term.
The unit is equipped with a counterflow enthalpy heat exchanger, which recovers not only heat but also part of the moisture from the extract air. Depending on the selected exchanger type and operating conditions, it can achieve temperature efficiency of up to 90% and moisture transfer efficiency of up to 75%. The two air streams remain completely separated from each other.
Enthalpy recovery helps reduce excessive drying of indoor air during the winter and improves thermal comfort. The exchangers are also designed with an emphasis on low pressure drop, contributing to quiet, economical and efficient operation.
System performance parameters with AFL CONSTANT FLOW fans:
RECUBOX® ERV 250 VENT-READY TOP can be equipped with three types of counterflow enthalpy heat exchangers.
The individual versions differ in enthalpy plate technology, construction, pressure drop and price. This allows RECUBOX® to be adapted to the specific requirements of each project – from an economical solution to premium METALPIC technology.
The exchanger type is selected during the ordering process.
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AIRWOODS AXT-LB 366-196-366 H300-2.5 Counterflow enthalpy heat exchanger with a very good price-to-performance ratio. A suitable solution for projects requiring enthalpy recovery, compact dimensions and economic affordability.
A practical choice for affordable enthalpy heat recovery ventilation. |
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ZERN ENGINEERING EC-EX 366-300 Enthalpy heat exchanger from ZERN ENGINEERING featuring a robust construction and proven technology for heat and moisture recovery.
A suitable choice for customers looking for a robust and long-term stable enthalpy solution. |
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RECUTECH RFK+16-300-F-28 – METALPIC Premium enthalpy heat exchanger from Czech manufacturer RECUTECH featuring modern METALPIC technology. It is the most advanced option for customers who require a high technological standard, low pressure drop and long-term durability.
Recommended for the most demanding applications where efficiency, comfort and build quality are key priorities. |
The casing is prepared so that the fans can be installed very quickly and without complicated modifications. AFL CONSTANT FLOW fans are installed simply by sliding them into the prepared opening and securing them in place.
All connections and condensate drains are designed symmetrically, allowing you to choose the final orientation of the unit during installation. RECUBOX® can also be operated with external fans according to your own system design.
EC fan control is very simple using a DC 0–10 V signal. The unit can be controlled, for example, by:
Product delivery: RECUBOX® ERV 250 VENT-READY TOP is supplied with an integrated enthalpy heat exchanger, but without fans and without a control unit. The fans and controller can be purchased separately and easily installed by the user.
RECUBOX® is prepared as standard for measurement, cabling and safe electrical installation. Thanks to carefully designed details, the installation of sensors, routing of cables and connection of fans is quick, clear and technically clean.
The unit therefore simplifies not only the initial installation, but also future servicing, modifications and expansion of the system.
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Diagram showing the position, number and design of the cable glands. |
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4 sensor holders RECUBOX® includes 4 holders for installing sensors. Each holder is positioned in one of the basic airflow paths: SUP, EHA, ETA and ODA. This makes the unit ready for easy and clearly arranged installation of measuring elements exactly where they are required for proper system control and monitoring. |
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Sealed rubber cable glands RECUBOX® is equipped with sealed rubber cable glands, which are closed off as standard. The glands are designed for safe and clean cable routing without the need for additional modifications to the unit, particularly for:
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Spacious electrical installation box for safe wiring RECUBOX® is equipped with a sufficiently large electrical installation box for neat and safe electrical wiring. All wires and cables are routed into this box through sealed rubber glands, helping protect the system against air and moisture ingress. From the installation box, screw-type cable glands provide a hermetically sealed and mechanically robust cable outlet to other parts of the system. The result is a clean, professional and long-term reliable electrical installation. |
RECUBOX® ERV 250 VENT-READY TOP is also available with a 100% mechanical BY-PASS. This sophisticated system simultaneously closes the fresh-air flow through the heat exchanger and opens a large bypass channel behind the exchanger.
One major advantage is that even when the BY-PASS is active, the air continues to be filtered through the same filter as during normal operation through the heat exchanger.
Removable BY-PASS mechanism
The entire mechanism can be completely removed from the RECUBOX® in a single motion, just like the other components. Servicing, inspection and cleaning are therefore exceptionally easy.
The mechanism is structurally prepared for installation of any servo actuator with a minimum torque of 5 Nm. The actuator is mounted onto the prepared 10 mm thick plastic plate and secured against rotation using the supplied metric screw. Compatibility with a 14 mm diameter shaft is required.
Casing airtightness is essential for efficient heat recovery ventilation. RECUBOX® is equipped with heavy-duty adjustable latches that allow the pressure of the cover against the seal to be precisely adjusted. This prevents unwanted air leakage and allows the unit to operate at the highest possible efficiency.
Thanks to their robust construction, high quality and hygienic safety, our RECUBOX® units are used in a number of projects at the Czech Technical University in Prague (CTU), including the unique S.A.W.E.R. system developed by UCEEB for extracting drinking water from air.
We provide an exceptional 12-year warranty on the airtightness of RECUBOX® unit casings.
The casing is made from high-quality polypropylene and joined using hot-gas welding technology, creating homogeneous, strong and long-term stable joints without the risk of degradation.
Unlike constructions using bonded joints, sealing tapes or combinations of different materials, RECUBOX® maintains its airtightness and mechanical durability even after many years of operation.
RECUBOX® ERV 250 VENT-READY TOP is not just a casing prepared for fans. It is a well-engineered foundation for exceptionally comfortable, stable and technically advanced enthalpy heat recovery ventilation. When fitted with AFL EC CONSTANT FLOW fans, the true strength of the entire VENT-READY concept becomes fully apparent.
Main benefit of CONSTANT FLOW technology:
AFL fans automatically maintain a constant volumetric airflow even when pressure losses in the system change. This means the unit continues to operate consistently even as filters gradually become clogged, operating conditions change or resistance in the ductwork fluctuates.
This is a major advantage over conventional fans, where the system must be laboriously balanced and any change in resistance can reduce performance or disturb balanced ventilation. With AFL CONSTANT FLOW fans, you get significantly more stable operation, more reliable air exchange and greater comfort without unnecessary adjustments.
| Constant airflow | The fans automatically compensate for changes in system resistance and maintain the set airflow without constant readjustment. |
| Automatic balanced ventilation |
Balanced operation of the VENT-READY system with AFL CONSTANT FLOW fans is very simple. Both fans can be connected to the same control signal from any suitable controller. If both fans receive the same control signal value, they automatically maintain the same volumetric airflow. This remains true even if each fan has to overcome different ductwork or filter resistance. |
| Lower noise | When resistance is lower, the fan automatically reduces its speed, allowing the system to operate more quietly and smoothly. |
| Lower energy consumption | When high performance is not required, the fan does not consume unnecessary energy. The result is more economical operation. |
| Full controllability | The Constant Flow function operates throughout the entire control range, allowing the unit's output to be easily adapted to the current requirements of the building. |
Practical benefit for the user:
When you choose RECUBOX® ERV 250 VENT-READY TOP and equip it with AFL EC CONSTANT FLOW fans, you get an exceptionally intelligent combination: a durable, hygienic and service-friendly RECUBOX® enthalpy unit together with fans that automatically maintain stable airflow. The result is modern heat and moisture recovery ventilation offering high comfort, low noise and no unnecessarily complicated balancing.
See why AFL CONSTANT FLOW fans are so exceptional for RECUBOX® VENT-READY.
The video demonstrates the principle that allows the fans to automatically respond to changes in system resistance and helps maintain stable heat recovery ventilation performance over the long term.
VENT-READY truly comes into its own with AFL CONSTANT FLOW. This is not merely mechanical compatibility, but a complete functional system providing more stable airflow, quieter operation, lower energy consumption and a simpler route to professionally functioning balanced heat recovery ventilation.
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Easy heat exchanger removal The heat exchanger can be quickly and easily removed from the RECUBOX® unit in a single motion. |
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Easy and safe maintenance The enthalpy heat exchanger can be easily removed and the interior of the unit can be thoroughly cleaned. The heat exchanger itself must be maintained strictly according to the instructions of the manufacturer of the selected type; enthalpy plates must not automatically be rinsed with water unless expressly permitted by the manufacturer. |
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Mechanical sealing without adhesives The heat exchanger is sealed by a gasket fitted into a groove, without the use of adhesives or self-adhesive sealing tapes. The gasket can be easily replaced if necessary. |
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No screws, rivets or adhesives RECUBOX® is manufactured from a single type of material using hot-gas welding technology. The result is airtight, long-term stable joints without degradation caused by ageing. |
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Wide range of sizes The VENT-READY range is available in several performance versions, and larger custom units can also be manufactured for higher airflow rates. |
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Choice of three enthalpy technologies The unit can be equipped with an AIRWOODS, ZERN ENGINEERING or premium RECUTECH METALPIC heat exchanger depending on the required parameters and budget. |
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Balanced operation When AFL CONSTANT FLOW fans are used, stable and balanced operation of the entire heat recovery ventilation system can be achieved very easily. |
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Option for installing an ionizer The unit can be supplemented, for example, with a MALAPA IN03 ionizer. |
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Maximum versatility The positioning of the inlet and outlet duct connections can be adapted to the specific installation in a wide range of configurations. |
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Reversible configuration The unit can be connected in either left-hand or right-hand orientation during installation. The condensate drain uses a 1/2" connection available in two positions. |
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Easy installation The unit is prepared for installation using threaded rods and can be easily positioned in a technical space. |
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Large-area filters The unit allows the use of different filter media. The standard version is equipped with M5 filter material. |
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BY-PASS A bypass replacement section or integrated 100% BY-PASS is available. |
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RECUBOX® can be ordered without insulation or with 30 mm or 50 mm insulation. The insulation is hermetically sealed between two casing layers. In the insulated version, an additional 5 mm PP outer casing is therefore added around the insulation, increasing the durability and rigidity of the entire RECUBOX®. |
Example of a RECUBOX® VENT-READY installation with REX EC control in a family house.
Click the diagram to enlarge.
The dimensions and structural design of the specific version are shown in the relevant technical drawing.
The final dimensions may depend on the selected duct connection diameter, insulation thickness and version with 100% BY-PASS. If the selected configuration requires a structural modification, we will contact you before production begins.
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Technical drawing of RECUBOX® ERV 250 VENT-READY TOP without BY-PASS Click the image to enlarge. Standard version with all four duct connections pointing upwards. |
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Technical drawing of RECUBOX® ERV 250 VENT-READY TOP with 100% BY-PASS Click the image to enlarge. Version with integrated 100% mechanical BY-PASS. |
The version is selected during the ordering process.
Front view of RECUBOX® with the service door open.
The stated dimensions include 50 mm insulation and the second casing layer. If the dimensions change, for example due to larger duct connections or another technical modification, we will inform you after the order is placed.
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RECUBOX® TOP – all 4 duct connections point upwards Dimensions: 743 (A) × 570 (B) × 590 (C) mm – width × height × depth The drawing shows both standard and mirrored connection layouts, which can be implemented without modifying the unit. |
RECUBOX® ERV 250 VENT-READY TOP is also available in two versions with a 100% BY-PASS.
Below you will find drawings of both versions including dimensions. The dimensions include 50 mm insulation. RECUBOX® is shown from above.
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100% BY-PASS version TOPL – left-hand configuration Fresh air enters the RECUBOX® on the left. Dimensions: 843 (A) × 713 (B) × 599 (C) mm – width × height × depth |
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100% BY-PASS version TOPP – right-hand configuration Fresh air enters the RECUBOX® on the right. Dimensions: 843 (A) × 713 (B) × 599 (C) mm – width × height × depth |
Prices are final and include the integrated enthalpy heat exchanger, all costs, taxes and fees.
Data sheet
Read verified reviews from those who have purchased from us.
regulation for a system with EC fans, frost protection or BY-PASS control programming of ventilation intensity, monitoring filter replacement, quick ventilation - control from the toilet,
Highly efficient EC fan AFL CONSTANT FLOW , designed for installation in the RECUBOX® 250 VENT-READY unit.Thanks to intelligent regulation, it maintains a constant flow rate of 250 m³/h...
The foundation for high-tech heat recovery ventilation.
RECUBOX® HRV 250 VENT-READY TOP is designed for easy installation.
High-end AFL EC fans with CONSTANT FLOW technology.
