REX EC V2 - heat recovery controller, recuboxes and heat...
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,
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. Enthalpy RECUBOX® ERV 360 VENT-READY TOP is ready for simple installation of top-tier AFL EC fans with a CONSTANT FLOW system.
RECUBOX® ERV 360 VENT-READY TOP is a compact heat recovery unit prepared for fitting with AFL EC CONSTANT FLOW fans. It represents an exceptionally durable, hygienic, and highly variable foundation for modern balanced ventilation with heat recovery in houses, apartments, and smaller commercial properties.
Custom manufacturing in the Czech Republic. We manufacture RECUBOX® units entirely in the Czech Republic according to our customers' exact requirements. We use premium-quality polypropylene materials from SIMONA AG and professional hot gas welding technology on equipment from Leister AG.
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Each RECUBOX® is built as an honestly crafted technical product – with an emphasis on accuracy, airtightness, long service life, and adaptability to the specific installation.
The casing is structurally optimized for installation with 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 respond to changes in system resistance and help maintain a stable airflow, balanced pressure, low noise, and energy-efficient operation over the long term.
The unit comes fitted with a counterflow enthalpy heat exchanger featuring a thermal efficiency of up to 90% and humidity efficiency of up to 75%. The exchanger is designed with a focus on low pressure drops, contributing to quiet, economical, and efficient operation.
Performance parameters of the system with AFL CONSTANT FLOW fans:
The Enthalpy RECUBOX® ERV 360 VENT-READY TOP can be equipped with three types of enthalpy counterflow heat exchangers.
Each exchanger offers different technology, structural design, and price/performance ratio. This allows the RECUBOX® to be tailored to the exact requirements of the project – from an economical solution up to premium METALPIC technology.
The choice of heat exchanger is selected during the ordering process.
The casing is pre-engineered to allow fans to be fitted very quickly and without complicated modifications. Installing the AFL CONSTANT FLOW fans is as simple as inserting them into the prepared opening and securing them in place.
All outlets and the condensate drain are designed to be reversible (mirrored), allowing you to choose the final orientation of the unit during actual installation. At the same time, the RECUBOX® can also be operated with external fans of your own design.
Controlling EC fans is very simple using a DC 0–10 V signal. The unit can be operated via:
Product Delivery: The Enthalpy RECUBOX® ERV 360 VENT-READY TOP is supplied as a standalone casing without fans and without a control unit. These can be purchased separately and easily installed by the user.
In its standard configuration, the RECUBOX® is fully prepared from the perspective of measurement, cabling, and safe electrical installation. Thanks to well-thought-out details, the mounting of sensors, routing of cables, and connection of fans is quick, clear, and technically clean.
As a result, the unit facilitates not only the initial installation but also future servicing, modifications, and expansions of the system.
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Drawing of the position, number, and type of cable glands. |
The Enthalpy RECUBOX® ERV 360 VENT-READY TOP is also available in a variant featuring a 100% mechanical BY-PASS. This sophisticated system simultaneously closes off fresh air passage through the heat exchanger while opening a large bypass channel behind it.
The main advantage is that even when the BY-PASS is active, the air continues to be filtered by the exact same filter used during standard operation through the core.
Removable BY-PASS Mechanism
The entire mechanism can be completely removed from the RECUBOX® in a single movement, just like the other components. Servicing, inspection, and cleaning are therefore exceptionally straightforward.
The mechanism is structurally engineered for the mounting of any standard actuator with a minimum torque of 5 Nm. The actuator is fastened to a pre-engineered 10 mm thick plastic plate and locked against rotation with the enclosed metric screw. Compatibility with a 14 mm diameter shaft is required.
Casing airtightness is vital for highly efficient heat recovery. The RECUBOX® is equipped with heavy-duty adjustable toggle latches, which allow you to precisely fine-tune the sealing pressure of the lid. This ensures the unit does not draw in false air and operates at its maximum possible efficiency.
Thanks to its robust construction, high quality, and hygienic safety, our RECUBOX® systems are part of numerous projects by **CTU** (Czech Technical University), including the unique **S.A.W.E.R.** system being developed by **UCEEB** to extract drinking water from desert air.
We provide an extended, above-standard 12-year warranty on the casing airtightness of RECUBOX® units.
The casing is constructed from premium-grade polypropylene and joined using hot gas welding technology, creating homogeneous, strong, and long-term stable joints with zero risk of degradation.
Unlike constructions that utilize glued joints, sealing tapes, or combinations of differing materials, the RECUBOX® maintains its airtightness and mechanical durability even after many years of operation.
The RECUBOX® ERV 360 VENT-READY TOP is not just a casing ready for fans. It is a highly engineered foundation for exceptionally comfortable, stable, and technically advanced heat recovery. It is specifically when fitted with AFL EC CONSTANT FLOW fans that the true strength of the entire VENT-READY concept is fully revealed.

The Main Benefit of CONSTANT FLOW Technology:
AFL fans automatically maintain a constant air volume flow even during changes in the system's pressure losses. This means that the unit operates stably even as filters gradually become clogged, operating conditions shift, or resistance in the ventilation ductwork fluctuates.
This is a massive advantage over standard fans, where the system must be laboriously adjusted, and any change in resistance can lead to a drop in performance or cause an imbalance in air pressure. With AFL CONSTANT FLOW fans, you get much more stable operation, reliable air exchange, and superior comfort without unnecessary manual adjustments to the settings.
| Constant Airflow | Fans automatically compensate for shifts in system resistance, maintaining the configured performance without constant resetting. |
| Automatic Balanced Pressure |
Balanced pressure operation is incredibly simple in the VENT-READY system with AFL CONSTANT FLOW fans. Both fans can be connected to the exact same control signal from any suitable regulation system. Consequently, if both fans receive the same control signal value, they automatically maintain an identical air volume flow. This holds true even if each fan is overcoming a different resistance from piping or filters. |
| Lower Noise Levels | At lower resistance, the fan automatically reduces its speed, allowing the system to run more quietly and smoothly. |
| Lower Power Consumption | When high performance is not required, the fan does not consume energy needlessly, resulting in more economical operation. |
| Full Adjustability | The Constant Flow feature works across the entire regulation range, allowing the unit's performance to be easily adjusted to the current requirements of the building. |
Practical Result for the User:
When you choose the RECUBOX® ERV 360 VENT-READY TOP and equip it with AFL EC CONSTANT FLOW fans, you gain an exceptionally smart combination: an indestructible, hygienic, and highly serviceable RECUBOX® unit paired with fans that independently monitor and maintain stable airflow. The result is a modern heat recovery system providing high comfort, low noise, and completely free from over-complicated balancing procedures.
See why AFL CONSTANT FLOW fans are so extraordinary for the RECUBOX® VENT-READY.
In this video, you will see the principle that allows the fans to automatically respond to resistance changes in the system and help maintain stable heat recovery performance over the long term.
VENT-READY makes true sense precisely with AFL CONSTANT FLOW. This is not just about mechanical compatibility, but a functional ecosystem that brings a more stable flow, quieter operation, lower consumption, and a simpler path to professionally functioning balanced heat recovery.
| Easy removal of the heat exchanger The heat exchanger can be removed from the RECUBOX® unit quickly and easily in a single movement. |
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| Maximum hygiene The heat exchanger can be easily removed and rinsed with water. The core is certified with a hygiene certificate from ILH Berlin. |
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| Mechanical sealing without adhesives The heat exchanger is sealed with an in-groove gasket without using glues or adhesive tapes. The seal can be easily replaced if necessary. |
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| Without screws, rivets, and adhesives RECUBOX® is manufactured from a single type of material using hot gas welding technology. This results in tight and long-term stable joints without aging degradation. |
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| Wide range of sizes The VENT-READY line is available in several performance variants, and larger versions for higher volumetric airflows can be custom manufactured. |
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| Compatibility with RECUTECH cores and other types The units are designed for high-quality RECUTECH exchangers with EUROVENT certification and other compatible cores depending on the specific configuration. |
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| Balanced pressure operation When using AFL CONSTANT FLOW fans, a stable and perfectly balanced operation of the entire ventilation system can be achieved with ease. |
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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 placement of the inlet and outlet spigots can be customized to the specific installation across a wide range of configurations. |
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| Mirrored design All variants are also available in left-handed and right-handed configurations. The condensate drain 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 straightforward positioning in the technical space. |
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| Large-surface filters The unit allows the use of various filter media. In its standard configuration, it comes fitted with an M5 class filter cloth. |
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| BY-PASS A short-circuit piece or an integrated 100% BY-PASS is available. |
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Technical drawing RECUBOX® ERV 360 VENT-READY TOP without BY-PASS Click on the image to enlarge. |
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Technical drawing RECUBOX® ERV 360 VENT-READY TOP with 100% BY-PASS Click on the image to enlarge. |
Example of connection of RECUBOX® VENT-READY with REX EC control in a detached house.
Click on the diagram to enlarge.
Selection of the variant is made during the ordering process.
Front view of the RECUBOX® with open service doors.
The dimensions listed include 50 mm insulation and the second skin casing. Should the dimensions change, for example due to larger spigots or other technical modifications, we will inform you after your order is placed.
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RECUBOX® TOP – all 4 spigots face upwards Dimensions: 843 (A) × 570 (B) × 690 (C) mm – width × height × depth The layout shows standard as well as mirrored configuration, which can be achieved without modifying the physical structure of the unit. |
The RECUBOX® ERV 360 VENT-READY TOP is also available in two variants with a 100% BY-PASS.
Below you will find drawings for both configurations including dimensions. Dimensions include 50 mm insulation. View of the RECUBOX® is from the top.
Prices are final including the integrated 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® 360 VENT-READY unit.Thanks to intelligent regulation, it maintains a constant flow rate of 360 m³/h...