RECUBOX® X-POOL HRV 6000 - 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 - 6000 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 industrial spaces with high humidity or the presence of mildly aggressive chemicals.
Design and material construction
The entire casing, heat exchanger, flanges, filter frame, holders and all external components are made of high-quality polypropylene (PP) – without metal parts and with maximum chemical resistance.
The material is extremely resistant to:
- chlorine and ozone in pool recirculation,
- acids and alkalis,
- solvents, alcohols and volatile organic compounds (VOC),
- salt mist and corrosive humidity.
The construction uses 100% welded joints – no glued seals and no leakage. All 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, premium quality and maximum hygienic safety, our RECUBOXES® 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.
Counterflow heat exchanger – RECUTECH EPOXY version
RECUBOX® is equipped with a heat exchanger in epoxy version, which is suitable for operation in more aggressive and corrosive environments.
- Corrosion resistance according to ASTM B117, verified in salt solution (NaCl 5% / 35 °C) for up to 1,000 hours
- High resistance to solvents – for example trichloroethylene (85 °C / 5 min) and tetrachloroethylene (120 °C / 30 min)
- Technical parameters corresponding to aluminium counterflow heat exchangers without epoxy coating
Installation and maintenance
- Fans are not part of the unit – they are installed directly into the air duct system, saving space in the technical room.
- If needed, the fans can be replaced quickly without interfering with the RECUBOX® unit itself.
Better properties than all-stainless heat recovery
Thanks to the resistance of polypropylene, RECUBOX® X-POOL is a very interesting alternative to all-stainless solutions in selected applications. Even stainless steel may corrode over time and lose tightness in aggressive chemical conditions, while a quality PP construction maintains its stability for the long term.
Perfect choice for
- Swimming pools, water parks, wellness centres and saunas – clean air recovery in environments with chlorine and high humidity
- Laboratories and fume hoods – heat recovery in mildly aggressive chemical environments
- Chemical plants and storage facilities, including gas 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 RECUBOX® unit very easily and quickly. It is placed on a sliding rail system (trolley), which allows it to be simply slid out of the unit. |
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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 suitable for demanding hygienic applications. |
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Mechanical sealing without adhesives The heat exchanger is sealed in a groove without using adhesives or tapes that 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. This results in absolutely tight joints without degradation caused by ageing. |
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Wide size range Thanks to a wide 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 line of RECUTECH heat exchangers in EPOXY version certified by EUROVENT. |
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Wide performance range RECUBOX® units cover a wide spectrum of applications, from small installations to large technological plants. |
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Maximum variability Spigot positioning (inlet and outlet) can be configured in a very wide range of variants according to the specific application. |
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Mirror version All variants are also available in mirror configuration. Condensate drainage is solved with a 1/2" threaded connection and is installed in two positions. |
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Easy installation Installation is simple thanks to prepared mounting holes for threaded rods. For larger RECUBOX® units, a sufficiently solid base must be used, with the threaded rod holes primarily serving to fix the unit in place. |
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Large-surface filters Possibility to use any filter media, which is easily replaceable. In the basic version, the unit is equipped with an M5 class filter. |
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100% BY-PASS Inside the RECUBOX® is a 100% BY-PASS mechanism that simultaneously closes the air passage through the exchanger and opens the bypass duct. |
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Double-skin design The unit casing consists of two layers of certified polypropylene, with 30 mm thick insulation and a reflective aluminium layer between them, eliminating thermal bridges. |
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 M5 class filter media.
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+95-1000-31 EPOXY
Ratio of internal to external air 1:1, outdoor temperature -3 °C and relative humidity 90%, indoor temperature 25 °C and relative humidity 60%. Results from calculation software certified by Eurovent.
Efficiency chart
Efficiency EFF [%] versus air volume flow AV [m³/h] – heat exchanger REK+95-1000-31 EPOXY
Ratio of internal to external air 1:1, outdoor temperature -3 °C and relative humidity 90%, indoor temperature 25 °C and relative humidity 60%. Results from calculation software certified by Eurovent.
Connection spigot layout variants
Selection is made during the ordering process.
View of the RECUBOX® from the front with the doors open.
Stated dimensions are without insulation. If dimensions change significantly (e.g. due to larger spigots), we will inform you after the order is placed.
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A01 Heat exchanger on wide tray, 4 side spigots Dimension: 1400 (A) × 1174 (B) × 1208 (C) mm – width × height × depth The drawing shows both standard and mirror layout. |
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A02 Heat exchanger on wide tray, 2 upward spigots, 2 side spigots Dimension: 1400 (A) × 1174 (B) × 1208 (C) mm – width × height × depth |
Service access and 100% by-pass dimensions
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Service access – dimension E A minimum space corresponding to the length of the heat exchanger must be left in front of the RECUBOX® door for comfortable removal of the exchanger. 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 provided by simple installation of any servo motor on a 12 × 12 mm square shaft. The by-pass opens a fresh air bypass route behind the heat exchanger while simultaneously closing the route through the exchanger. The mechanism is a louvre system made of galvanized sheet metal. Since it is located on the fresh air side, it is not normally exposed to aggressive chemical contaminants 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.
How our customers rate us
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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 - 6000 m3/h.