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The basis for high-tech recuperation.
RECUBOX® HRV 250 VENT-READY is ready for easy installation
top-of-the-line AFL EC fans with CONSTANTFLOW system
RECUBOX® HRV 250 VENT-READY is a compact heat recovery unit prepared for 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 production in the Czech Republic. We manufacture RECUBOX® units entirely in the Czech Republic according to precise customer requirements. We use high-quality polypropylene materials from SIMONA AG and professional processing technology on 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 stable airflow, balanced pressure, low noise, and economical operation over the long term.
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 losses, contributing to quiet, economical, and efficient operation.
Performance parameters of the system with AFL CONSTANT FLOW fans:
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1. RECUTECH RSK+16-300-25 – all-aluminum counter-flow exchanger, Czech manufacturer
2. RECUTECH RSF+16-300-H-F-29 – exchanger with HPS lamellas, Czech manufacturer
3. ZERN ENGINEERING HU-EX6 366/300 – exchanger with HPS lamellas and HPS casing, Ukrainian manufacturer
The casing is prepared so that the 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 symmetrically (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 250 VENT-READY is delivered as a standalone casing without fans and without a control unit. These can be purchased separately and are easy for the user to install.
In its basic version, RECUBOX® is also prepared in terms of measurement, cabling, and safe electrical installation. Thanks to thoughtful details, the installation of sensors, cable routing, and fan connection is 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. As a result, the unit is ready for easy and clear 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 prepared tight rubber cable grommets, which are plugged in the basic version. The grommets are designed for safe and clean cable routing without the need for additional interventions into the unit's structure, specifically for:
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Spacious installation box for safe electrical wiring RECUBOX® is equipped with an adequately large installation box for organized and safe electrical connections. All wires and cables are routed into this box through tight rubber grommets, which help protect the system against air and moisture penetration. Furthermore, threaded glands lead out of the installation box, allowing for hermetically sealed and mechanically durable cable routing to other parts of the system. The result is a clean, professional, and long-term reliable electrical solution. |
RECUBOX® HRV 250 VENT-READY is also available in a variant with 100% mechanical BY-PASS. This sophisticated system simultaneously closes the fresh air passage through the exchanger and opens a large bypass channel behind the exchanger.
The advantage is that even with the bypass active, the air remains 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 motion, just like other components. Servicing, 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 on 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.
Casing airtightness is crucial for efficient heat recovery. RECUBOX® is equipped with heavy-duty adjustable buckles that allow for precise fine-tuning of the lid's pressure on the seal. Thanks to this, the unit does not draw in false air and operates at maximum possible efficiency.
Thanks to its robust construction, high quality, and hygienic safety, our RECUBOX® units are part of many CTU projects, including the unique S.A.W.E.R. system, which UCEEB is developing for extracting drinking water from the 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 risk of degradation.
Unlike constructions using glued joints, sealing tapes, or combinations of different materials, RECUBOX® maintains its airtightness and mechanical resistance even after many years of operation.
RECUBOX® HRV 250 VENT-READY is not just a casing prepared for fans. It is a thoughtful foundation for exceptionally comfortable, stable, and technically advanced heat recovery. It is specifically when equipped with AFL EC CONSTANT FLOW fans that the true power of the entire VENT-READY concept is fully revealed.
Main benefit of CONSTANT FLOW technology:
AFL fans automatically maintain a constant volumetric air flow even during changes in system pressure losses. This means the unit operates stably even as filters gradually become clogged, operating conditions change, or resistance in the ventilation ductwork fluctuates.
This is a huge advantage over conventional fans, where the system must be complexly tuned and every change in resistance can result in decreased performance or loss of balanced pressure. With AFL CONSTANT FLOW fans, you get much more stable operation, guaranteed air exchange, and higher comfort without unnecessary interventions into the settings.
| Constant airflow | Fans automatically compensate for changes in system resistance and maintain set performance without constant readjustment. |
| Easier balanced pressure | Supply and exhaust air can be maintained in 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 across the entire regulation range, so the unit's power can be easily adapted to the current needs of the building. |
Practical result for the user:
When you choose RECUBOX® HRV 250 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 plus 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 are so exceptional for RECUBOX® VENT-READY.
In the video, you will see the principle by which fans automatically react to changes in system resistance and help maintain stable heat recovery performance over the long term.
VENT-READY makes real sense specifically with AFL CONSTANT FLOW. It is 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 removal of the exchanger The exchanger can be easily and quickly removed from the RECUBOX® unit in one pull. 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 adhesive tapes. The gasket can be easily replaced if necessary. |
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Without screws, rivets, and adhesives RECUBOX® is made from one 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 range is available in several performance variants, and larger versions can be custom-made for higher volumetric flows. |
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Compatibility with RECUTECH and other exchanger types Units are designed for high-quality RECUTECH exchangers with EUROVENT certification and other compatible exchangers according to the specific configuration. |
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Balanced pressure operation When using AFL CONSTANT FLOW fans, stable and balanced pressure operation of the entire heat recovery system can be very easily achieved. |
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Option to install 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 ports 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 versions. Condensate drainage is handled via a 1/2" connection in two positions. |
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Easy installation The unit is prepared for mounting using threaded rods and allows for simple placement in a technical space. |
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Large-area filters The unit allows for the use of various filter media. In its basic design, it is equipped with M5 class filter fabric. |
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BY-PASS A short-circuit part or integrated 100% BY-PASS is available. |
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RECUBOX® can be ordered without insulation or with 30 mm and 50 mm insulation. The insulation is hermetically sealed between two shells. In the insulated version, an additional 5mm PP shell is added along with the insulation, increasing durability and overall quality. |
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Technical drawing RECUBOX® HRV 250 without BY-PASS – A01 Click the image to enlarge. Variant without BY-PASS, standard technical design of the unit. |
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Technical drawing RECUBOX® HRV 250 with 100% BY-PASS – A01 Click the image to enlarge. Variant with integrated 100% BY-PASS. |
Example of RECUBOX® VENT-READY connection with REX EC control in a family house.
Click the diagram to enlarge.
Variant selection takes place during the ordering process.
Front view of RECUBOX® with the door open.
The listed dimensions include 50 mm insulation and the second shell. Should dimensions change due to larger ports or other technical adjustments, we will inform you after ordering.
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A01 – without BY-PASS Exchanger on a wide tray, 4 ports to the sides Dimension: 743 (A) × 595 (B) × 599 (C) mm – width × height × depth The drawing shows both classic and mirrored connections. |
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A02 – without BY-PASS Exchanger on a wide tray, 2 ports up, 2 ports to the sides Dimension: 743 (A) × 595 (B) × 599 (C) mm – width × height × depth The drawing shows both classic and mirrored connections. |
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B01L – without BY-PASS Exchanger on a wide tray, 4 ports to the sides Dimension: 595 (A) × 743 (B) × 599 (C) mm – width × height × depth Left version – waste air inlet top left, fresh air inlet bottom left. |
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B01P – without BY-PASS Exchanger on a wide tray, 4 ports to the sides Dimension: 595 (A) × 743 (B) × 599 (C) mm – width × height × depth Right version – waste air inlet top right, fresh air inlet bottom right. |
RECUBOX® HRV 250 VENT-READY is also available in variants including 100% BY-PASS.
The selection of the specific variant takes place during the ordering process. Below we list the basic versions with a description of orientation and connection port placement.
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A01L and A01P – including 100% BY-PASS Exchanger on a wide tray, 4 ports to the sides Dimension: 843 (A) × 713 (B) × 599 (C) mm – width × height × depth A01L = Left unit version – fresh air inlet to RECUBOX® on the left – see drawing A01P = Right unit version – fresh air inlet to RECUBOX® on the right – see drawing |
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A02L and A02P – including 100% BY-PASS Exchanger on a wide tray, 2 ports up, 2 ports to the sides Dimension: 843 (A) × 713 (B) × 599 (C) mm – width × height × depth A02L = Left unit version – fresh air inlet to RECUBOX® on the left – see drawing A02P = Right unit version – fresh air inlet to 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® 250 VENT-READY unit. Thanks to intelligent regulation, it maintains a constant flow rate of 250 m³/h...
The basis for high-tech recuperation.
RECUBOX® HRV 250 VENT-READY is ready for easy installation
top-of-the-line AFL EC fans with CONSTANTFLOW system
