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The basis for high-tech heat recovery with an output of 520 m3/h.
The enthalpic RECUBOX® 520 VENT-READY is ready for easy installation
top-of-the-line AFL EC fans with CONSTANTFLOW system
RECUBOX® HRV 520 VENT-READY is a compact heat recovery unit prepared for installation with AFL CONSTANT FLOW EC fans. It represents an exceptionally durable, hygienic, and versatile foundation for modern balanced pressure air recovery in family houses, apartments, and smaller commercial buildings.
Custom manufacturing in the Czech Republic. RECUBOX® units are fully manufactured in the Czech Republic according to specific customer requirements. We use high-quality polypropylene materials from SIMONA AG and professional processing technology using Leister AG equipment.
The casing is structurally optimized for AFL EC CONSTANT FLOW fans, which represent an exceptionally smart solution for modern heat recovery. Thanks to the built-in Constant Flow function, the fans automatically react to changes in system resistance and help maintain long-term stable airflow, balanced pressure, low noise levels, and energy-efficient operation.
The unit is equipped with a counter-flow heat recovery exchanger with an efficiency of up to 90 %. The exchanger is intentionally designed with an emphasis on low pressure drops, which contributes to quiet, economical, and efficient operation.
System performance parameters with AFL CONSTANT FLOW fans:
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1. RECUTECH RSK+16-500-25 – All-aluminum counter-flow exchanger, Czech manufacturer
2. RECUTECH RSF+16-500-H-F-29 – Exchanger with HPS lamellas, Czech manufacturer
3. ZERN ENGINEERING HU-EX6 366/500 – Exchanger with HPS lamellas and HPS casing, Ukrainian manufacturer
The casing is prepared so that fans can be installed very quickly and without complex modifications. Installation of AFL CONSTANT FLOW fans is done by simply sliding them into the prepared opening and securing them.
All outlets and the condensate drain are designed mirrored, so you choose the final orientation of the unit during the actual installation. RECUBOX® can also be operated with external fans according to your own 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® HRV 520 VENT-READY is delivered as a standalone casing without fans and without a control unit. These can be purchased separately and easily installed by the user.
RECUBOX® is prepared in its basic version for measurement, cabling, and safe electrical installation. Thanks to well-thought-out details, the mounting of sensors, cable routing, and fan connection are fast, organized, and technically clean.
The unit thus facilitates not only the installation itself but also future service, modifications, and system expansion.
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4 holders for sensor installation RECUBOX® includes 4 holders for mounting sensors. Each holder is located in one of the primary air paths: SUP, EHA, ETA, and ODA. This ensures the unit is ready for easy and organized installation of measuring elements exactly where they are needed for proper system control and monitoring. |
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Tight rubber cable grommets RECUBOX® features tight rubber cable grommets, which are sealed in the basic version. The grommets are designed for safe and clean cable routing without the need for additional interventions into the unit's construction, specifically for:
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Spacious installation box for safe electrical wiring RECUBOX® is equipped with a sufficiently large installation box for organized and safe electrical connection. All wires and cables are routed into this box through tight rubber grommets, which help protect the system against air and moisture penetration. From the installation box, screw-in conduits lead further, allowing for a hermetically sealed and mechanically durable cable exit to other parts of the system. The result is a clean, professional, and long-term reliable electrical solution. |
RECUBOX® HRV 520 VENT-READY is also available in a version with a 100% mechanical BY-PASS. This sophisticated system simultaneously closes the fresh air passage through the exchanger and opens a large bypass duct behind the exchanger.
The advantage is that even when the by-pass is active, the air continues to be filtered by the same filter as during normal operation through the exchanger.
Removable BY-PASS mechanism
The entire mechanism can be completely removed from the RECUBOX® in one move, just like the other components. Service, inspection, and cleaning are therefore exceptionally easy.
The mechanism is structurally prepared for the installation of any actuator with a minimum torque of 5 Nm. The actuator is mounted onto a prepared 10 mm thick plastic plate and locked against rotation with the included metric screw. Compatibility with a 14 mm diameter shaft is required.
Airtightness of the casing is essential for effective heat recovery. RECUBOX® is equipped with massive adjustable latches, which allow for precise adjustment of the lid's pressure on the seal. As a result, the unit does not draw in false air and operates at the maximum possible efficiency.
Thanks to robust construction, high quality, and hygienic safety, our RECUBOX® units are part of many CTU (Czech Technical University) projects, including the unique S.A.W.E.R. system, which UCEEB is developing for extracting drinking water from air.
We provide an above-standard 12-year warranty on the airtightness of the RECUBOX® unit casing.
The casing is made of high-quality polypropylene and joined using hot gas welding technology, resulting in homogeneous, strong, and long-term stable joints without the risk of degradation.
Unlike constructions using glued joints, sealing tapes, or combinations of different materials, RECUBOX® maintains its airtightness and mechanical durability even after many years of operation.
RECUBOX® HRV 520 VENT-READY is not just a casing ready for fans. It is a sophisticated foundation for exceptionally comfortable, stable, and technically advanced heat recovery. It is precisely when equipped with AFL EC CONSTANT FLOW fans that the true power of the entire VENT-READY concept is revealed.
Main benefit of CONSTANT FLOW technology:
AFL fans automatically maintain a constant air volumetric flow even when pressure losses in the system change. This means that the unit operates stably even when filters gradually clog, operating conditions change, or resistance in the air distribution network fluctuates.
This is a huge advantage over standard fans, where the system must be complexly fine-tuned and performance can drop or pressure balance can be lost with every change in resistance. With AFL CONSTANT FLOW fans, you get much more stable operation, more reliable air exchange, and higher comfort without unnecessary setting adjustments.
| Constant Airflow | Fans automatically compensate for changes in system resistance and maintain the set performance without constant readjustment. |
| Easier Balanced Pressure | Supply and exhaust air can be maintained at a more stable ratio over the long term, which is crucial for proper heat recovery function. |
| Lower Noise | At lower resistance, the fan automatically reduces RPM, so the system can run quieter and more refined. |
| Lower Consumption | When high performance is not needed, the fan does not consume energy unnecessarily. The result is more economical operation. |
| Full Controllability | The Constant Flow feature works throughout the entire control range, so the unit's performance can be easily adapted to the current needs of the building. |
Practical Result for the User:
When you choose RECUBOX® HRV 520 VENT-READY and equip it with AFL EC CONSTANT FLOW fans, you get an exceptionally smart combination: an indestructible, hygienic, and service-accessible RECUBOX® unit and, additionally, fans that monitor stable airflow themselves. The result is modern heat recovery with high comfort, low noise, and without unnecessarily complex commissioning.
See why AFL CONSTANT FLOW fans for RECUBOX® VENT-READY are so exceptional.
In the video, you will see the principle thanks to which the fans automatically react to changes in system resistance and help maintain stable heat recovery performance over the long term.
VENT-READY makes true sense specifically with AFL CONSTANT FLOW. It's not just about mechanical compatibility, but a functional whole that brings more stable flow, quieter operation, lower consumption, and a simpler path to professionally functioning balanced pressure heat recovery.
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Easy Exchanger Removal The exchanger can be easily and quickly removed from the RECUBOX® unit in one move. It is mounted on a sliding system that allows for convenient sliding out of the unit. |
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Maximum Hygiene The exchanger and the entire unit can be easily removed and thoroughly cleaned. The exchanger is certified with the ILH Berlin hygiene certificate. |
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Mechanical Sealing Without Adhesives The exchanger is sealed with a gasket in a groove without the use of adhesives or sealing tapes. The gasket can be easily replaced if necessary. |
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Without Screws, Rivets, and Adhesives RECUBOX® is made of a single type of material using hot gas welding technology. The result is tight and long-term stable joints without aging degradation. |
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Wide Range of Sizes The VENT-READY series is available in several power variants, and larger versions can be custom-made for higher volumetric flow rates. |
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Compatibility with RECUTECH and Other Exchangers Units are designed for high-quality RECUTECH exchangers with EUROVENT certification and other compatible exchangers depending on the specific configuration. |
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Balanced Pressure Operation By using AFL CONSTANT FLOW fans, a stable and balanced pressure operation of the entire recovery system can be very easily achieved. |
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Possibility of Installing an Ionizer The unit can be supplemented, for example, with a MALAPA IN03 ionizer. |
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Maximum Variability The location of inlet and outlet spigots can be adapted to a specific installation in a wide range of variants. |
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Mirrored Design All variants are also available in left and right-hand versions. Condensate drainage is handled by a 1/2" connection in two positions. |
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Easy Installation The unit is ready for mounting using threaded rods and allows for simple installation in a technical space. |
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Large Area Filters The unit allows for the use of various filter media. In the basic version, it is equipped with M5 class filter textile. |
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BY-PASS A short-circuit part or an integrated 100% BY-PASS is available. |
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RECUBOX® can be ordered without insulation or with 30 mm and 50 mm insulation. Insulation is hermetically sealed between two shells. In the insulated version, a further 5mm PP shell is added in addition to the insulator, which increases durability and overall quality of workmanship. |
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Technical Drawing RECUBOX® HRV 520 without BY-PASS – A01 Click on the image to enlarge. Variant without BY-PASS, standard technical design of the unit. |
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Technical Drawing RECUBOX® HRV 520 with 100% BY-PASS – A01 Click on the image to enlarge. Variant with integrated 100% BY-PASS. |
RECUBOX® VENT-READY wiring example with REX EC control in a family house.
Click on the diagram to enlarge.
The choice of variant occurs during the ordering process.
Front view of the RECUBOX® with the door open.
The dimensions shown include 50 mm insulation and the second shell. If dimensions change due to, for example, larger spigots or other technical modifications, we will inform you after the order.
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A01 – without BY-PASS Exchanger on a wide tray, 4 side spigots Dimensions: 843 (A) × 623 (B) × 799 (C) mm – width × height × depth The drawing shows both standard and mirrored connection. |
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A02 – without BY-PASS Exchanger on a wide tray, 2 spigots upward, 2 side spigots Dimensions: 843 (A) × 623 (B) × 799 (C) mm – width × height × depth The drawing shows both standard and mirrored connection. |
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B01L – without BY-PASS Exchanger on a wide tray, 4 side spigots Dimensions: 843 (A) × 623 (B) × 799 (C) mm – width × height × depth Left-hand version – extract air inlet top left, fresh air inlet bottom left. |
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B01P – without BY-PASS Exchanger on a wide tray, 4 side spigots Dimensions: 843 (A) × 623 (B) × 799 (C) mm – width × height × depth Right-hand version – extract air inlet top right, fresh air inlet bottom right. |
RECUBOX® HRV 520 VENT-READY is also available in variants including 100% BY-PASS.
The choice of specific variant occurs during the ordering process. Below are the basic designs with a description of orientation and spigot placement.
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A01L and A01P – including 100% BY-PASS Exchanger on a wide tray, 4 side spigots Dimensions: 843 (A) × 713 (B) × 799 (C) mm – width × height × depth A01L = Left-hand version of the unit – fresh air inlet to the RECUBOX® on the left – see drawing A01P = Right-hand version of the unit – fresh air inlet to the RECUBOX® on the right – see drawing |
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A02L and A02P – including 100% BY-PASS Exchanger on a wide tray, 2 spigots upward, 2 side spigots Dimensions: 843 (A) × 713 (B) × 799 (C) mm – width × height × depth A02L = Left-hand version of the unit – fresh air inlet to the RECUBOX® on the left – see drawing A02P = Right-hand version of the unit – fresh air inlet to the RECUBOX® on the right – see drawing |
Prices are final including the integrated 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® 520 VENT-READY unit.Thanks to intelligent regulation, it maintains a constant flow rate of 520 m³/h...
The basis for high-tech heat recovery with an output of 520 m3/h.
The enthalpic RECUBOX® 520 VENT-READY is ready for easy installation
top-of-the-line AFL EC fans with CONSTANTFLOW system
