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!
Made in the Czech Republic ...
Equipped with an RX 04/500 or RX-P 04/500 exchanger .....
Removable exchanger .....
Output up to 800 m3/hour .....
Certified efficiency up to 96%.....
M5 filters .....
Product image notice: The photographs are for illustration purposes only and may not show the exact variant or selected RECUBOX® configuration being offered. The relevant technical drawings and diagrams are decisive for the specific design, dimensions and arrangement of individual structural elements.
RECUBOX® OPEN represents a modular heat recovery system solution offering a high degree of flexibility in the final ventilation system. Unlike conventional compact heat recovery units, the fans are not permanently integrated into the RECUBOX® casing – they are installed separately directly in the ductwork, just like the other system components.
This allows the fan output, control, filtration, silencers, heaters, dampers, BY-PASS and other accessories to be designed precisely according to the specific installation. The result is long service life, easy maintenance, simple replacement of individual components and the possibility of future system expansion or modernisation.
RECUBOXES® 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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Each RECUBOX® is created as a carefully manufactured technical product with an emphasis on precision, airtightness, long service life and the possibility of adaptation to a specific installation.
Casing airtightness is essential for efficient operation of a heat recovery system. RECUBOX® is equipped with robust adjustable toggle latches that allow the pressure of the service door against the seal to be precisely adjusted.
This helps reduce unwanted infiltration of false air and allows the system to operate at the highest possible efficiency. At the same time, quick and convenient service access to the heat exchanger and the interior of the RECUBOX® is maintained.
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At least 8 holders for threaded rods In its standard configuration, RECUBOX® is equipped with at least eight structural holders with holes for threaded rods. Their arrangement allows RECUBOX® to be mounted:
New position of adjustable latches from 2026 From 2026, all insulated RECUBOXES® are equipped with toggle latches with adjustable clamping pressure. The latches are positioned so that they do not protrude above the upper edge of the RECUBOX® and do not prevent installation of the unit directly against the ceiling. Some older product photographs may still show the latches in their original position. On RECUBOXES® manufactured from 2026 onwards, their position no longer restricts installation directly against the ceiling. |
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RECUBOX® is equipped with high-quality connection flanges with double-lip seals. The double-lip seal ensures a secure and airtight connection to the ventilation ductwork and helps reduce unwanted air leakage or infiltration at the connection point. The duct connection is therefore quick, reliable and easily accessible for servicing. |
Thanks to their robust construction, high quality and hygienic safety, our RECUBOXES® are part of a number of CTU projects, including the unique S.A.W.E.R. system developed by UCEEB for extracting drinking water from air.
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Easy heat exchanger removal The heat exchanger can be removed from the RECUBOX® simply and quickly, practically in a single movement. This significantly simplifies regular inspection, maintenance and cleaning. |
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Maximum hygiene The removable heat exchanger allows thorough cleaning of both the heat exchanger itself and the entire interior of the RECUBOX®. The design places emphasis on easy maintenance and a high level of operational hygiene. |
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Mechanical sealing of the heat exchanger The heat exchanger is sealed inside the RECUBOX® using a seal inserted into a groove, without the use of adhesives or conventional self-adhesive sealing tapes. The heat exchanger can therefore be easily removed and reinstalled. The seal can also be easily replaced if necessary. |
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No screws, rivets or structural adhesives The RECUBOX® casing is made from a single type of material using hot-gas welding technology. This results in strong, homogeneous and airtight joints without the risk of corrosion of conventional metal fasteners or gradual degradation of bonded structural joints. |
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Wide range of sizes RECUBOXES® are manufactured in a wide range of dimensions and performance variants. Thanks to the custom design, a suitable solution can also be created for installations with limited space. |
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Designed for counterflow heat exchangers RECUBOX® OPEN units are designed for a wide range of counterflow heat exchangers and their specific construction is always adapted to the installed heat exchanger type. |
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Wide performance range The RECUBOX® product range allows systems to be designed from small residential applications up to large ventilation systems with airflow rates in the thousands of m³/h. |
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Option to connect an ioniser Depending on the requirements of the specific installation, the system can be supplemented, for example, with a MALAPA IN03 ioniser or other ventilation components. |
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Maximum flexibility The position of the inlet and outlet ports can be adapted to the specific project, duct routing, required duct diameter and the available space in the plant room. |
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Mirrored configuration A mirrored configuration is available for all suitable variants. The condensate drain uses a 1/2" threaded connection and, depending on the specific configuration, can be prepared in several positions. |
We provide an extended 12-year warranty on the airtightness of RECUBOX® casings.
The casing is made of high-quality polypropylene and joined using hot-gas welding, creating homogeneous, strong and long-term stable joints without the risk of corrosion or gradual separation of structural joints.
Unlike constructions using bonded joints, rivets, sealing tapes or combinations of different materials, RECUBOX® retains its airtightness and mechanical resistance even after many years of operation.
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Easy installation Installation is simplified by at least eight prepared holders with holes for threaded rods. RECUBOX® can be suspended from the ceiling or fixed to a wall using the holders at its rear wall. |
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Large-area filters The large filtration area helps reduce airflow velocity through the filter medium and limits pressure drop. The filter frames also allow easy replacement of the filter medium. In its standard configuration, RECUBOX® is equipped with M5 filter fabric. |
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BY-PASS The BY-PASS is available as a separate bypass section or as an integrated solution with manual operation or preparation for an actuator. The BY-PASS shaft diameter is 14 mm. |
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RECUBOX® can be ordered without thermal insulation or with insulation 30 or 50 mm thick. In the insulated version, the thermal insulation is hermetically sealed between two polypropylene casings. In addition to the insulation material, a second 5 mm PP casing is therefore added, protecting the insulation and creating a compact structural unit. |
RECUBOX® OPEN can optionally be supplemented with extended preparation for measurement, cabling and safe electrical installation.
This configuration, which is included as standard in the RECUBOX® VENT-READY range, simplifies the installation of sensors, cable routing, fan connection and future servicing or system expansion.
The optional preparation must be selected during the ordering process or specified in the order notes.
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Illustration of the position, number and design of the cable glands. |
RECUBOX® OPEN RX 04/500 can be ordered with a plastic or aluminium counterflow heat exchanger.
The specific heat exchanger is selected during the ordering process. The RECUBOX® construction is always adapted to the dimensions and design of the selected heat exchanger.
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1. RECUTECH REP+27-500-H-F-30 Plastic counterflow heat exchanger from the Czech manufacturer RECUTECH. RekupeX product designation: RX-P 04/500. |
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2. ZERN ENGINEERING HU-EX6 271/500-1 Plastic counterflow heat exchanger with HPS plates and a durable HPS casing. |
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3. RECUTECH REK+27-500-22 All-aluminium counterflow heat exchanger from the Czech manufacturer RECUTECH. RekupeX product designation: RX 04/500. |
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4. HOLMAK GS 30/500 All-aluminium counterflow heat exchanger representing a high-quality alternative for this RECUBOX® size. |
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RECUBOX® OPEN RX 04/500 – A01 Illustrated configuration:
Click the image to open the drawing in full size. |
The variant is selected during the ordering process.
Front view of the RECUBOX® with the service door open.
The stated dimensions include thermal insulation and 2 casings. If the dimensions need to be modified, for example due to larger connection ports or another technical change, we will inform you after ordering and before production begins.
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A01 Heat exchanger on the wide tray, 4 side connection ports Dimensions: 655 (A) × 418 (B) × 645 (C) mm |
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B01 Heat exchanger on the narrow tray, 4 side connection ports Dimensions: 655 (B) × 418 (A) × 645 (C) mm |
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A02 Heat exchanger on the wide tray, 2 upward-facing ports and 2 side ports Dimensions: 655 (A) × 418 (B) × 645 (C) mm |
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B02 Heat exchanger on the narrow tray, 2 upward-facing ports and 2 side ports Dimensions: 655 (B) × 418 (A) × 645 (C) mm |
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Service access – dimension E Sufficient space must be left in front of the RECUBOX® service door to allow the heat exchanger to be pulled out of the module. E = C − 60 mm Integrated BY-PASS – dimension F The integrated BY-PASS is located behind the heat exchanger and increases the overall depth of the RECUBOX® by approximately one third of the basic depth. F = 1/3 × C The BY-PASS opens a bypass route for fresh air around the heat exchanger with a very low pressure drop. In this configuration, opening the BY-PASS does not close the airflow path through the heat exchanger. However, due to the significantly lower pressure drop of the open bypass route, the amount of air passing through the heat exchanger is minimised. |
RECUBOX® is manufactured according to the selected configuration. The position and diameter of the connection ports, orientation of the service door, position of the condensate drain, insulation method, BY-PASS configuration and other structural details can be adapted to the specific installation.
If the selected configuration cannot be technically implemented or if another solution would be more suitable, we will contact you before production begins.
Example of the RECUBOX® construction in a version without access doors:
The product price includes the integrated heat exchanger and the configuration specified for the particular product variant. Any optional accessories, preparation for sensors and electrical installation, and individual structural modifications are governed by the configuration selected during the ordering process.
Data sheet
Read verified reviews from those who have purchased from us.
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Made in the Czech Republic ...
Equipped with an RX 04/500 or RX-P 04/500 exchanger .....
Removable exchanger .....
Output up to 800 m3/hour .....
Certified efficiency up to 96%.....
M5 filters .....
