RECUBOX® X-POOL HRV 450 – Chemically resistant recovery unit for swimming pools and aggressive environments
All-plastic version of RECUBOX®
Chemically resistant RECUBOX® suitable for swimming pools and the chemical industry
Absolute resistance to chlorine
Performance from 0 - 450 m3/h.
RECUBOX® X-POOL
RECUBOX® X-POOL is a premium chemically resistant heat recovery unit designed for air heat recovery in swimming pools, wellness centres, saunas, laboratories and other spaces with high humidity or the presence of mildly aggressive chemicals.
Why choose RECUBOX® X-POOL
- High chemical resistance for swimming pool and corrosive environments
- Robust welded construction without screws, rivets or adhesives
- Easy cleaning and a high hygiene standard
- Easy installation and straightforward servicing
- High configuration flexibility and flexible positioning of connection ports
- Long service life even under demanding operating conditions
Design and material construction
The entire unit casing, flanges, filter frames, holders and other external components are made of high-quality polypropylene (PP). The construction is designed without unnecessary metal components, with maximum emphasis on resistance in demanding environments.
The unit material is highly resistant to:
- chlorine and ozone in swimming pool applications,
- acids and alkalis,
- solvents, alcohols and volatile organic compounds (VOC),
- salt mist and corrosive humidity.
The construction uses 100% welded joints. This means no glued joints, no adhesive seals and a minimal risk of leakage. All important sealing elements are mechanically fitted and are easy to replace.
Smooth hygienic walls allow easy cleaning and maintenance. The unit is designed to provide very low servicing requirements while maintaining a high hygiene standard.
Thanks to their robust construction, high quality and maximum hygienic safety, our RECUBOX® units are part of a number of CTU projects, including the unique S.A.W.E.R. system, which UCEEB is developing for extracting drinking water from air.
Heat exchanger – RECUTECH EPOXY version
The unit is equipped with a heat exchanger in an epoxy-coated version, suitable for operation in more aggressive and corrosive environments.
- Corrosion resistance according to ASTM B117, tested in a salt spray chamber (NaCl 5% / 35 °C) for up to 1,000 hours
- High resistance to solvents – for example trichloroethylene and tetrachloroethylene
- Technical parameters corresponding to aluminium counterflow heat exchangers without an epoxy surface coating
Installation and maintenance
- Fans are not part of the unit – they are installed directly in the ventilation ductwork, saving space in the plant room.
- If necessary, the fans can be replaced quickly without interfering with the RECUBOX® unit itself.
- The unit is designed for easy service access and straightforward maintenance.
A better choice than all-stainless-steel heat recovery
Thanks to the properties of polypropylene, RECUBOX® X-POOL is a highly attractive alternative to all-stainless-steel solutions in selected applications. In aggressive chemical environments, even stainless steel may suffer from corrosion over time, while a high-quality PP construction maintains its long-term stability and airtightness.
Perfect choice for
- Swimming pools, water parks, wellness centres and saunas – environments with chlorine and high humidity
- Laboratories and fume hoods – heat recovery in mildly aggressive chemical environments
- Chemical plants and storage facilities, including filling stations
- Paint shops, galvanising plants and treatment facilities with corrosive vapours
- Agricultural buildings – for example environments with ammonia or silage gases
- Production and technological containers in corrosive and humid environments
Main advantages of RECUBOX® units
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Easy heat exchanger removal The heat exchanger can be removed from the unit very easily and quickly, literally in one movement. |
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Maximum hygiene Both the unit and the heat exchanger can be easily accessed and thoroughly cleaned. The heat exchanger is certified with the ILH Berlin hygiene certificate and the RECUBOX® material is also suitable for demanding hygienic applications. |
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Mechanical sealing without adhesives The heat exchanger is sealed in a groove without the use of adhesives or adhesive tapes that may degrade over time. The seal can be easily replaced if necessary. |
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No screws, rivets or adhesives RECUBOX® is made from a single material using hot-gas welding technology. The result is completely airtight joints without degradation caused by ageing. |
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Wide size range Thanks to the broad range of sizes, we can design a suitable RECUBOX® even for spaces with limited installation possibilities. |
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Compatibility with RECUTECH heat exchangers RECUBOX® X-POOL units are designed for the complete range of RECUTECH heat exchangers in EPOXY versions certified by EUROVENT. |
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Wide performance range RECUBOX® units cover a broad range of applications, from smaller installations to large technological operations. |
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Maximum flexibility The positioning of inlet and outlet connection ports can be configured in a very wide range of variants according to the specific application. |
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Mirror configuration All variants are also available in a mirrored configuration. Condensate drainage is provided by a 1/2" threaded connection and is fitted in two positions. |
Additional practical advantages
Easy installation thanks to prepared mounting holes for threaded rods.
Large-surface filters allow the use of any suitable filter medium. In the standard version, the unit is equipped with M5 filter media.
By-pass is available as a separate bypass section or as an integrated version with the possibility of servo actuator control.
Pressure drop chart
Pressure drop PD [Pa] versus air volume flow AV [m³/h] – REK+27-400-22 EPOXY heat exchanger
Parameters for an average winter period in the Czech Republic
Indoor/outdoor airflow ratio 1:1, outdoor air temperature 1 °C and relative humidity 78%, indoor air temperature 25 °C and relative humidity 28%. The results are generated using calculation software certified by the European Eurovent association.
Efficiency chart
Efficiency EFF [%] versus air volume flow AV [m³/h] – REK+27-400-22 EPOXY heat exchanger
Parameters for an average winter period in the Czech Republic
Indoor/outdoor airflow ratio 1:1, outdoor air temperature 1 °C and relative humidity 78%, indoor air temperature 25 °C and relative humidity 28%. The results are generated using calculation software certified by the European Eurovent association.
RECUBOX® technical drawing
Below you can find the technical drawing of the RECUBOX® X-POOL HRV 450 A01 OPEN unit, including its basic dimensions and construction details. Click the preview to display the drawing in full resolution.
Click the preview to display the drawing in full resolution.
Connection port configuration options
Selection is made during the ordering process.
Front view of the RECUBOX® with the door open.
The stated dimensions include the complete double-skin construction and 30 mm thermal insulation. If the final unit dimensions need to be significantly modified, for example due to larger connection ports or another technical modification, we will inform you in advance after the order has been placed.
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A01 Heat exchanger on the wide tray, 4 side connection ports Dimensions: 638 (A) × 433 (B) × 516 (C) mm – width × height × depth The drawing shows both standard and mirrored configurations. |
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B01 Heat exchanger on the narrow tray, 4 side connection ports Dimensions: 638 (B) × 433 (A) × 516 (C) mm – height × width × depth The drawing shows both standard and mirrored configurations. |
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A02 Heat exchanger on the wide tray, 2 top connection ports and 2 side connection ports Dimensions: 638 (A) × 433 (B) × 516 (C) mm – width × height × depth The drawing shows both standard and mirrored configurations. |
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B02 Heat exchanger on the narrow tray, 2 top connection ports and 2 side connection ports Dimensions: 638 (B) × 433 (A) × 516 (C) mm – height × width × depth The drawing shows both standard and mirrored configurations. |
Data sheet
- Material
- SIMONA AlphaPLUS - POLYPROPYLENE
- Operating temperature [°C]
- -20 .. +80
- Country of origin
- CZ
- Zero corrosion risk: This fan does not come into contact with chlorine or pool humidity, because it works exclusively with outdoor air.
- Choice: A standard high-quality inline duct fan is sufficient for this position without the need for special chemical resistance.
- Filtration barrier: Air from the pool first passes through filter fabric, which mechanically captures aerosol (microdroplets of water with concentrated chlorine).
- Condensation cleaning: In the heat recovery exchanger, the air cools down and the moisture condenses. This water binds gaseous chlorine to itself and safely drains it away into the wastewater system.
- Result: The fan placed after the RECUBOX works with significantly “cleaned” air, which protects its motor and bearings.
What fans should be selected for pool ventilation?
The selection of fans for pool areas is critical due to the high humidity and the presence of aggressive chlorine. However, when using the RECUBOX® X-POOL unit, the design of the unit significantly changes the fan resistance requirements in your favor.
1. Fan for supply air (fresh air)
In this part of the system, the situation is the simplest. The supply fan draws in clean outdoor air and pushes it through the heat recovery exchanger into the pool hall.
2. Fan for exhaust air (waste air)
Thanks to the unique integration with the RECUBOX® X-POOL unit, the exhaust fan is protected in a way that significantly extends its service life:
Recommendations for installation and maintenance
Key rule: RECUBOX® as the lowest point of the system
For proper operation, the RECUBOX® unit must be installed at the lowest point of the air handling route. Only then can the ducting naturally drain all aggressive condensate with chlorine towards the unit and subsequently into the drain. This prevents moisture from accumulating near the fans or at critical duct joints.
| Duct material | For the exhaust branch, we recommend exclusively plastic (PVC/PP) or stainless steel ducting. Aluminum ducting is subject to rapid corrosion. |
| Fan type | We recommend choosing fans in an all-plastic design with protection rating at least IP44. |
| Filter maintenance | Regular inspection of the filter fabric is essential in pools to maintain the cleanliness of the exchanger as well as fan protection. |
Our professional view: The combination of the durable RECUBOX® X-POOL design and suitably selected plastic fans represents the technically cleanest solution for modern pools. This configuration saves costs because it eliminates the need for extremely expensive industrial fans intended for the chemical industry.
Note: The above information represents the manufacturer’s recommended technical practice for extending component service life. The final fan selection should always correspond to the HVAC design and the expected concentration of chemical substances in the specific installation.
What ducting should be used for pool ventilation?
The choice of ductwork material is just as important for a swimming pool as the heat recovery unit itself. An aggressive environment with chlorine content combined with high humidity can destroy improperly selected ducting within a few months.
Why avoid aluminum and cheap “flex” hoses?
Commonly used aluminum flexible ducts (so-called Alu-flexi, Sono-flexi) are completely unsuitable for pool environments. Chlorine vapors cause rapid oxidation of aluminum, which appears as white powder formation followed by perforation of the duct wall.
Warning about leaks: Once corrosion occurs, the system loses pressure balance, humidity in the building structure increases, and mold may develop around leaking duct sections.
Recommended materials for RECUBOX® X-POOL
For long-term reliable operation of pool ventilation, we recommend using materials that naturally resist corrosion:
| Plastic ducting (PVC / PP) | Ideal choice for pools. Smooth plastic ducts are 100% resistant to chlorine and moisture and have minimal pressure losses. |
| Stainless steel ducting | Premium solution with extreme mechanical durability. Suitable for exposed design ducting in interior spaces. |
| Insulated EPE ducting | Excellent for routes passing through unheated areas. Foamed polyethylene is non-absorbent and chemically resistant. |
Important: Slope and condensate drainage
Gravity works for you:
All horizontal duct runs must be sloped towards the RECUBOX® unit (minimum slope 1–2%). Since the RECUBOX® is installed at the lowest point, all condensate containing chlorine compounds flows smoothly into the exchanger and directly into the drain. This prevents the formation of “pockets” of standing water inside the ductwork.
Practical tip: If flexible ducting must be used in certain places (e.g. for connections), always use plastic flexible hoses or hoses with a chemically resistant inner layer. This will help you avoid costly repairs in ceiling spaces in the future.
Note: Proper selection of duct material is crucial to maintain the 12-year warranty on the airtightness of the RECUBOX® unit casing. Inappropriate ducting may negatively affect the hygiene of the entire system.
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All-plastic version of RECUBOX®
Chemically resistant RECUBOX® suitable for swimming pools and the chemical industry
Absolute resistance to chlorine
Performance from 0 - 450 m3/h.