RECUBOX® X-POOL HRV 2000 – 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
Performance from 0 - 2000 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 pool and corrosive environments
- Robust welded construction without screws, rivets or adhesives
- Easy cleaning and high hygiene standard
- Simple installation and easy servicing
- High design flexibility and connection spigot positioning
- Long service life even in demanding operating conditions
Design and material construction
The entire unit casing, flanges, filter frame, holders and other external components are made of high-quality polypropylene (PP). The design is created without unnecessary metal parts, with an emphasis on maximum resistance in demanding environments.
The unit material is highly resistant to:
- chlorine and ozone in swimming pool operation,
- acids and alkalis,
- solvents, alcohols and volatile organic compounds (VOC),
- salt mist and corrosive humidity.
The construction uses 100% welded joints. This means no bonded joints, no adhesive seals and minimal risk of leakage. All important sealing elements are mechanically designed and are easy to replace.
Smooth hygienic walls allow easy cleaning and maintenance. The unit is designed to offer very low service 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 epoxy 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 counterflow aluminium heat exchangers without epoxy coating
Installation and maintenance
- Fans are not part of the unit – they are installed directly into the duct system, saving space in the plant room.
- If needed, the fans can be replaced quickly without interfering with the RECUBOX® unit itself.
- The unit is designed for easy service access and simple maintenance.
A better choice than all-stainless heat recovery
Thanks to the properties of polypropylene, RECUBOX® X-POOL is, in selected applications, a very attractive alternative to all-stainless solutions. In aggressive chemical environments, even stainless steel may suffer corrosion over time, while a quality PP construction maintains its stability and tightness over the long term.
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 facilities and storage areas, including filling stations
- Paint shops, galvanizing 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 move. |
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Maximum hygiene Both the unit and the heat exchanger can be easily removed 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, which degrade over time. The seal can be easily replaced if needed. |
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No screws, rivets or adhesives RECUBOX® is made from a single material using hot-gas welding technology. The result is absolutely tight 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 options. |
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Compatibility with RECUTECH heat exchangers RECUBOX® X-POOL units are designed for the complete range of EUROVENT-certified RECUTECH heat exchangers in EPOXY version. |
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Wide performance range RECUBOX® units cover a broad spectrum of applications, from smaller installations to large technological operations. |
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Maximum flexibility The positioning of inlet and outlet spigots 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 mirror design. Condensate drainage is provided by a 1/2" threaded fitting and is installed in two positions. |
Additional practical advantages
Easy installation thanks to prepared mounting holes for threaded rods.
Large-surface filters allow the use of any filter media. In the standard version, the unit is equipped with filter media of class M5.
By-pass is available as a shortcut 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] – heat exchanger REK+81-500-26 EPOXY
Internal/external air ratio 1:1, outdoor air temperature 1 °C and relative humidity 78%, indoor air temperature 25 °C and relative humidity 28%. Results are based on calculation software certified by the European Eurovent association.
Efficiency chart
Efficiency EFF [%] versus air volume flow AV [m³/h] – heat exchanger REK+81-500-26 EPOXY
Internal/external air ratio 1:1, outdoor air temperature 1 °C and relative humidity 78%, indoor air temperature 25 °C and relative humidity 28%. Results are based on calculation software certified by the European Eurovent association.
Connection spigot layout variants
The selection is made during the ordering process.
View of the RECUBOX® from the front with the doors open.
The stated dimensions are without insulation. If the dimensions were to change significantly, for example due to larger connection spigots or another technical modification, we will inform you after the order is placed.
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A01 Heat exchanger on wide drain pan, 4 side spigots Dimension: 1327 (A) × 1012 (B) × 666 (C) mm – width × height × depth The drawing shows both standard and mirror connection layout. |
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B01 Heat exchanger on narrow drain pan, 4 side spigots Dimension: 1327 (B) × 1012 (A) × 666 (C) mm – height × width × depth The drawing shows both standard and mirror connection layout. |
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A02 Heat exchanger on wide drain pan, 2 upward spigots, 2 side spigots Dimension: 1327 (A) × 1012 (B) × 666 (C) mm – width × height × depth The drawing shows both standard and mirror connection layout. |
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B02 Heat exchanger on narrow drain pan, 2 upward spigots, 2 side spigots Dimension: 1327 (B) × 1012 (A) × 666 (C) mm – height × width × depth The drawing shows both standard and mirror connection layout. |
Service access and 100% by-pass dimensions
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Service access – dimension E A minimum space corresponding to the heat exchanger length must be left in front of the RECUBOX® doors so that the heat exchanger can be removed comfortably. E = C - 60 [mm] Integrated by-pass – dimension F The integrated by-pass is located behind the heat exchanger and increases the unit depth by approximately one third. F = 1/3 × C [mm] By-pass damper control can be ensured by simple installation of any servo actuator onto the 12 × 12 mm square shaft. The by-pass opens the fresh air bypass route behind the heat exchanger while simultaneously closing the path through the heat exchanger. The mechanism is made as a louvre system from galvanized sheet metal. Because it is positioned on the fresh air side, it is not normally exposed to aggressive chemical impurities from the exhaust air. |
Data sheet
- EUROVENT certification:
- YES
- 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
Performance from 0 - 2000 m3/h.