The HRU-FlatAIR-X-125 series represents the highest-capacity model in the FlatAIR-X flush-mounted range. Delivering a maximum air flow of 125 m3/h at 100 Pa, it is the ideal choice for small to medium-sized apartments or for applications demanding a higher flow rate from a compact, easily concealed unit. Like all models in the series, the unit is constructed with a self-supporting EPP (Expanded Polypropylene) casing, which guarantees outstanding thermal and acoustic insulation. This design ensures that despite the increased flow, the unit maintains efficient and relatively quiet operation, with a sound power level of 52 dB(A).
Maximal Efficiency and Exchanger Selection
The HRU-FlatAIR-X-125 allows architects and developers to specify the thermal performance based on project-specific requirements:
Standard Model (HRU-FlatAIR-X-125-H/CF): Features a Counterflow Plastic (PET) heat exchanger, achieving a high maximal thermal efficiency of up to 93.4%.
Enthalpy Model (HRU-FlatAIR-X-125E-H/CF): Utilises a heat and moisture-recovering enthalpy exchanger, crucial for balancing indoor humidity. This model provides maximal moisture efficiency of up to 71.1%.
Declared Properties according to EU Regulation (125-H and 125E-H Variants)
Property
HRU-FlatAIR-X-125-H (PET)
HRU-FlatAIR-X-125E-H (Enthalpy)
Max Air Flow Rate
125 m3/h @ 100 Pa
125 m3/h @ 100 Pa
Thermal Efficiency (EN 13141-7:2010)
83.4%
82.0%
Maximum Power Input
72 W
75 W
Sound Power Level
52 dB(A)
52 dB(A)
Energy Efficiency Class (SEC)
A/A+ (depending on control)
A/B (depending on control)
All models are equipped with an 800W built-in electric pre-heater.
Installation and Configuration Versatility for Installers
The unit’s design ensures straightforward installation and maximum adaptability to architectural requirements:
Flexible Duct Connection: The interchangeable spigots offer the major advantage of directly connecting four 75mm semi-rigid FLX ducts (two per air path). This feature significantly reduces material costs and installation complexity by eliminating the need for bulky manifolds. Standard 100mm duct connection is also supported.
Mounting Options: Supports Suspended, Vertical, and Horizontal orientations.
Routing Adaptability: The ability to connect ducts from three sides ensures seamless integration for both flush-mounted (concealed) and surface-mounted applications.
Advanced Control and System Stability Features
The HRU-FlatAIR-X-125 is engineered for intelligent, reliable performance over its lifetime:
Constant Flow (CF) System: The optional CF variant (e.g., -125-H-CF) ensures the unit always delivers the specified 125 m3/h air flow, automatically adapting fan speed to overcome typical system resistance increases, such as filter clogging.
Integrated Climate Control: Features a standard built-in RH sensor for automatic maintenance of optimal humidity and a modulated, automatic by-pass for summer cooling.
Connectivity: Ready for modern control via mobile app, compatible with wired controllers, and supports integration into LOXONE and Modbus smart ecosystems.
External Systems: Dedicated X25 potential-free contact for easy connection to an external kitchen cooker hood and provision for managing a Ground Heat Exchanger (GHE).
Filtration: Comes with ISO Coarse 70% filters, with visual indicators (LED on unit and controller) for simplified, timely maintenance.
