RECUBOX® X-POOL HRV 1800- 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 - 1800 m3/h.
RECUBOX® X-POOL HRV 1800 – Chemically Resistant Heat Recovery Unit
RECUBOX® X-POOL HRV 1800 is a robust heat recovery unit designed for volumetric airflow rates of up to 1,800 m³/h, engineered for high-humidity environments, swimming pool systems, SPAs, wellness spaces, and applications with chemically demanding indoor air.
Depending on project specifications, the unit can be equipped with two types of counterflow heat exchangers – either the RECUTECH REK+53-600-24 EPOXY exchanger for chemically more aggressive environments, or the ZERN ENGINEERING HU-EX6 533/500-3 GOLDEN exchanger for swimming pools, SPAs, and humid, chlorine-laden air.
Two Variants Based on the Type of Operation
RECUBOX® X-POOL HRV 1800 can be configured according to the character of the exhaust air.
For environments with more aggressive chemical substances, we recommend the variant with the RECUTECH EPOXY heat exchanger. For swimming pool and SPA facilities, where moisture and chlorine are present in the air, the variant with the specially treated ZERN GOLDEN heat exchanger is ideal.
The choice of heat exchanger is selected during the ordering process.
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RECUTECH REK+53-600-24 EPOXY Variant for chemically more aggressive environments. The counterflow heat exchanger in an epoxy finish is suitable for applications where chemically active or corrosive substances may be present in the air. This variant is designed for demanding technological spaces, laboratories, chemical processing plants, and other applications where enhanced chemical resistance of the heat exchanger is required.
Recommended Use: chemically active environments, laboratories, technical facilities, fume hoods, selected industrial applications. |
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ZERN ENGINEERING HU-EX6 533/600-3 GOLDEN Variant for swimming pools, SPAs, wellness centers, and coastal or chlorinated environments. The ZERN ENGINEERING heat exchanger in the GOLDEN version features an epoxy-coated casing finish. The fins are made of HPS material, making this variant highly suitable for the ventilation of swimming pools, SPAs, and wellness spaces with high humidity and chlorine content in the air.
Recommended Use: swimming pools, wellness centers, SPAs, water parks, hotel pools, hot tubs, and spaces with humid air containing chlorine. |
Important Distinction of Use:
We recommend RECUTECH EPOXY for environments containing chemically more aggressive substances.
We recommend ZERN GOLDEN primarily for swimming pools and SPAs, meaning humid air containing chlorine. This variant is not primarily intended for highly aggressive chemical processing facilities.
Structural and Material Design
The casing of the RECUBOX® X-POOL unit is made of premium-quality polypropylene (PP), which offers long-term resistance to moisture, corrosion, and a wide array of chemical factors.
The construction utilizes hot gas welding technology. This creates strong, homogeneous, and permanently tight joints without the use of adhesives, rivets, or a combination of differing materials.
Smooth interior walls, mechanically engineered seals, and easy service access allow for simple maintenance and a high standard of hygiene.
The polypropylene structure is highly suitable for environments with:
- high humidity,
- chlorinated pool air,
- corrosive moisture,
- salt spray,
- selected chemically active substances depending on the specific application.
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.
Application by Selected Heat Exchanger
| RECUTECH REK+53-600-24 EPOXY |
For chemically more demanding environments. Suitable for technological operations, laboratories, fume hoods, chemical applications, more corrosive environments, and spaces where enhanced chemical resistance of the heat exchanger is required. |
| ZERN HU-EX6 533/500-3 GOLDEN |
For swimming pools, SPAs, and humid chlorinated air. Suitable for private and commercial swimming pools, wellness centers, SPAs, hot tubs, and areas with high humidity and chlorine content in the air. |
Installation and Maintenance
- Fans are not included with the unit – they are installed directly into the ventilation ducting.
- External fan placement saves space in the technical room and simplifies servicing.
- If necessary, fans can be replaced without interfering with the RECUBOX® itself.
- The heat exchanger is accessible via a service door and can be removed, inspected, or cleaned as required.
Advantages over Conventional Stainless Steel Solutions
Thanks to its polypropylene construction, RECUBOX® X-POOL is an appealing alternative to all-stainless steel solutions. Even stainless steel can corrode under aggressive or permanently humid conditions, whereas a high-quality welded PP structure retains its stability, airtightness, and durability.
RECUBOX® X-POOL is therefore ideal wherever long lifespan, easy maintenance, and high resistance to moisture and selected chemical influences are critical.
Perfect Choice For
- Swimming pools, water parks, wellness centers, and SPAs – especially in the variant with the ZERN GOLDEN heat exchanger.
- Laboratories and fume hoods – especially in the variant with the RECUTECH EPOXY heat exchanger.
- Chemical processing plants and warehouses – depending on the specific chemical load and selected configuration.
- Production and technological containers in corrosive or humid environments.
- Coastal areas and environments with salt spray.
Main Advantages of RECUBOX® X-POOL Units
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Easy removal of the heat exchanger The heat exchanger can be removed from the RECUBOX® unit very easily and quickly. It is mounted on a sliding track system that allows for convenient extension out of the unit. |
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Maximum hygiene Both the heat exchanger and the internal space of the unit can be effortlessly inspected and cleaned. Smooth PP walls minimize dirt accumulation and facilitate maintenance. |
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Mechanical sealing without adhesives The heat exchanger is sealed with an in-groove gasket without using glues or adhesive tapes, which can degrade over time. The seal can be easily replaced if necessary. |
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Welded PP construction RECUBOX® is manufactured from polypropylene using hot gas welding technology. This results in solid, long-term airtight joints with no gluing and no joint degradation due to aging. |
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Maximum flexibility 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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Large-surface filters The unit allows the use of replaceable filter media. In the standard version, the unit comes equipped with an M5 class filter. |
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Double-skin construction The unit's casing consists of two layers of polypropylene with thermal insulation sandwiched between them. This solution enhances durability, stability, and workmanship quality. |
Connection Spigot Placement Options
Selection is made during the ordering process.
Front view of the RECUBOX® with open service doors.
The dimensions shown apply to the version with 50 mm insulation and a double-wall construction. If the dimensions change significantly, for example due to larger connection spigots or other technical modifications, we will inform you after the order is placed.
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A01 Exchanger on a wide tray, 4 side spigots Dimensions: 983 (A) × 758 (B) × 799 (C) mm – width × height × depth The drawing illustrates both standard and mirrored connection layouts. |
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B01 Exchanger on a narrow tray, 4 side spigots Dimensions: 983 (B) × 758 (A) × 799 (C) mm – height × width × depth The drawing illustrates both standard and mirrored connection layouts. |
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A02 Exchanger on a wide tray, 2 top spigots, 2 side spigots Dimensions: 983 (A) × 758 (B) × 799 (C) mm – width × height × depth The drawing illustrates both standard and mirrored connection layouts. |
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B02 Exchanger on a narrow tray, 2 top spigots, 2 side spigots Dimensions: 983 (B) × 758 (A) × 799 (C) mm – height × width × depth The drawing illustrates both standard and mirrored connection layouts. |
Service Access and 100% BY-PASS Dimensions
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Service access – dimension E Sufficient space must be left in front of the RECUBOX® service doors to slide the heat exchanger out of the unit. E = C - 60 [mm] Integrated BY-PASS – dimension F The integrated BY-PASS is located behind the heat exchanger and increases the resulting depth of the unit depending on the specific configuration. We will inform you of the exact final dimensions of the RECUBOX® with an integrated BY-PASS based on your chosen configuration. The BY-PASS opens the fresh air bypass route behind the heat exchanger while simultaneously closing off the path through the exchanger. |
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
Absolute resistance to chlorine
Performance from 0 - 1800 m3/h.