Exclusive UK Partner
Liberty Composite Air Handling Units
Sustainable, corrosion-resistant AHUs designed and built to last, ideal for swimming pools, healthcare, laboratories and corrosive environments.
Corrosion Immune – CX Extreme Rating
12-Year Warranty on Casing
54% Lower Carbon Footprint than Metal
Eurovent Certified Performance
The only fully composite AHU on the market – completely corrosion immune with CX Extreme rating, exceeding C5i/C5m industrial standards.
Perfect for Swimming Pools, Healthcare & Corrosive Environments
Why Choose Composite AHU?
Liberty air handling units are made entirely of high-quality composite material including the casing, internal partition walls, support profile and even the base frame. This revolutionary approach eliminates corrosion completely.
Unlike metal units that require costly coatings or galvanising to prevent rust, composite is naturally corrosion-resistant and requires no surface treatment. The result is air handling units with an ultra-low CO₂ footprint that are designed to last decades, even in the most demanding environments.
With over 40 years of industry experience and Eurovent certification, Liberty AHUs deliver first-class performance ratings across all key metrics: T1 thermal transmission, TB1 cold bridge, D1 mechanical strength, L1 air tightness, and F9 filter bypass leakage.
Speak to our team: 01494 525 342
Composite AHU Key Benefits
Corrosion Immunity
CX Extreme rating – the highest corrosion protection classification, exceeding C5i/C5m. No coating or galvanising required. Perfect for swimming pools, chemical plants and coastal environments.
Sustainable
54% lower carbon footprint than metal AHUs. Inner wall composed of 80% recycled PET granules. Ultra-low CO₂ footprint throughout the entire lifecycle.
Lightweight
40% less weight than traditional metal units. Easier installation, reduced structural requirements, and lower transportation costs throughout the supply chain.
Cold Bridge Free
EN 1886 T1/TB1 certified. 70mm wall thickness with integrated cold bridge free locks. No condensation or moisture formation in unwanted places.
Hygienic
Completely smooth PET inner wall compliant with VDI 6022 & 3803. Easy chemical cleaning with chlorine or hydrogen peroxide. HEPA filter compatible up to H14.
Robust & Durable
70mm wall thickness for exceptional mechanical strength. Weather and UV-resistant gel-coat top layer. 12-year warranty on casing with no additional conditions.
Application Sectors
Liberty AHUs deliver specialist solutions for demanding environments
Vertical Farming
Vertical farming is the future of sustainable food production – growing fresh produce indoors, pesticide-free and weather-independent. With ultra-high yields and minimal water usage, it’s reshaping agriculture.
Healthcare
Clean safe air for infection prevention. Smooth PET surface prevents MRSA. Double hygienic sealing and HEPA filtration up to H14 for surgery rooms and care facilities.
Laboratories & Pharma
Bio Safety Level compliant (NEN-EN 12 128). Safe removal of contaminated air with minimal leakage. Accurate pressure control and BMS integration.
Food & Nutrition
Hygienic air for food production, processing and storage. Bacteria-free, well-conditioned air ensuring product quality. Redundant design options for uninterrupted production.
Swimming Pools
High humidity, chloride presence and vapour pressure demand corrosion-immune solutions. Liberty AHUs meet new Dutch trichloramine regulations (<0.5 mg/m³).
Life Cycle Cost Analysis
Typical return on investment: 2 years
A composite air handling unit with a Eurovent energy label A is an excellent starting point for an energy-efficient and sustainable project.
Our Life Cycle Cost Calculation provides certainty by comparing up to three different air handling units in terms of:
- Energy costs
- Maintenance costs
- Investment costs
- Heat pump options
Specialised calculations available for swimming pools, offices and utilities – designed and tested against active legislation.
Technical Specifications
| Corrosion Class | CX Extreme (above C5i/C5m) |
| Wall Thickness | 70mm |
| Thermal Transmission | T1 (EN 1886) |
| Thermal Cold Bridge | TB1 (EN 1886) |
| Mechanical Strength | D1 |
| Air Tightness | L1 |
| Filter Bypass Leakage | F9 |
| Weight Reduction | 40% lighter than metal |
| Carbon Footprint | 54% lower than metal |
| Hygienic Standard | VDI 6022 & 3803 |
| Inner Wall Material | 80% recycled PET |
| Filter Class | Up to H14 HEPA |
| Casing Warranty | 12 years |
| Certification | Eurovent, ISO 9001 |
40+ Years of Experience
Since 1983, Liberty (by Rosenberg NL) has supplied a wide range of ventilation solutions. After the successful introduction of composite roof fans, they developed the Liberty product line – a unique series of fully composite air handling units.
Now a subsidiary of the HC Groep, market leader in indoor climate technology in the Netherlands, Liberty AHUs are successfully used across Europe in new construction and renovation projects.
Their Knowledge Centre brings together over 100 years of combined industry experience, helping translate climate requirements into optimal technical solutions.
Eurovent Certified Performance
AHU No 15.11.007
Ready to discuss your project requirements?
Contact Envirotec today for a consultation and Life Cycle Cost analysis