ONYX Core
ONYX Core 120
Higher-airflow concealed ducted dehumidification for larger residential and commercial spaces.
Concealed ducted dehumidification and air treatment
Core 120 applies the same concealed, separately ducted approach as Core 70 with greater dehumidification capacity and airflow, and likewise accepts a controlled quantity of outdoor fresh air mixed with indoor return air.
Indoor air is drawn into the concealed unit through a dedicated return duct, passes the filtration stages and the dehumidification module where moisture condenses out of the air stream, and drier treated air is returned to the space through a dedicated supply duct. Condensate is removed continuously through a drainage line.
- Dehumidification capacity up to 120 litres per day
- Nominal airflow approximately 1,000 m³/h
- Accepts a controlled quantity of outdoor fresh air mixed with indoor return air at the unit inlet
- Concealed ceiling or service-space installation with its own return and supply ductwork
- LCD controller with RS485 / Modbus capability for integration with building controls
Technical data
Published figures only.
- Dehumidification capacity
- Up to 120 L/day
Performance is stated under rated conditions. Final equipment selection is subject to project conditions and professional assessment.
- Nominal airflow
- Approx. 1,000 m³/h
Performance is stated under rated conditions. Final equipment selection is subject to project conditions and professional assessment.
- Recommended continuous fresh-air mixing
- Approx. 400 m³/h
Outdoor air mixed with indoor return air at the unit inlet. This is not the total supply airflow of the unit.
- Maximum fresh-air flow
- Up to approx. 600 m³/h
Final fresh-air volume depends on outdoor conditions, indoor return-air mixing, duct design and engineering assessment.
- Unit dimensions (L × W × H)
- 1,040 × 736 × 315 mm
Manufacturer product manual.
- Extended dimensions
- L1 1,083 mm · L2 1,140 mm · W1 633 mm
Manufacturer product manual dimension drawing.
- Duct connections
- Ø200 mm and Ø200 mm
Manufacturer product manual. Duct spigot diameters must not be altered on site.
- Power supply
- 220–240 V, 50 Hz, single phase
Manufacturer product manual. Three-core flexible cable 3 × 1.0 mm², fuse T6.3L 250 V, 10 A socket.
- Operating range
- Dehumidification 15–32 °C · fresh-air operation −10 to 40 °C
Manufacturer installation manual. Storage and transport −20 to 60 °C.
- Installation
- Concealed, ducted, ceiling-mounted by qualified technicians
- Air path
- Dedicated ONYX Core return and supply ductwork
- Condensate
- Discharged through a drainage line with an integrated lift pump
Full technical specifications are available following project consultation.
Capacity figures apply under rated conditions.
Installation architecture
Separate concealed ducted system with an engineered return-air and supply-air arrangement, installed independently of the air-conditioning system.
Most ONYX NOVA solutions are concealed ducted systems installed separately from the air-conditioning system. ONYX Zenith may also be integrated into an air-conditioning or wider HVAC system where the project design allows.
Explore ONYX ducted dehumidifiers for UAE properties — or compare ONYX Core and Aero.
Operating modes
- Fresh-air mode — outdoor air is filtered and supplied without the dehumidification module running
- Internal recirculation — indoor air is circulated and filtered without dehumidification
- Internal recirculation dehumidification — indoor air is recirculated with the dehumidification module running
- Fresh-air / mixed-air dehumidification — outdoor air mixed with indoor return air is dehumidified
- Automatic operation switches between these states according to indoor conditions
Filtration and air treatment
- Washable primary filter on the return-air path
- High-efficiency filter stage for finer particles
- Only the stages included in the supplied configuration are provided; the configuration is confirmed per project
Controls
- Dedicated LCD control panel
- RS485 communication using the Modbus protocol for integration with a higher-level controller
- Operates on humidity demand, independently of the air-conditioning system
Maintenance
- Clean the primary filter every one to three months, more often in dusty conditions; do not use a high-pressure water jet
- Replace the primary filter after approximately three cleaning cycles
- The high-efficiency HEPA filter is not washable and must be replaced at intervals not exceeding three months
- Drainage line and condensate lift pump should be checked as part of routine service
- The unit must be isolated from the power supply before any maintenance
Installation requirements (for professionals)
- Maintenance access panel of at least 750 × 550 mm on the service-door side
- At least 100 mm clearance above the unit and at least 60 mm below it to the false ceiling
- Level suspension on M10 threaded rods with the supplied base, checked with a spirit level
- At least 1 m of connecting duct after the supply-air outlet
- Insulated condensate drain line to prevent surface condensation
- Outdoor duct terminations require rain hoods with insect mesh
- Electrical connection, cabling, protection devices and isolation must follow local wiring regulations and the manufacturer installation manual
Important engineering limitations
- ONYX Core is never connected into the air-conditioning ductwork; it uses its own engineered return and supply air paths
- Core and the AC system may use separately divided portions of the same visible architectural grille, while their ducts, boots and air paths remain physically separate
- Long duct runs, undersized ducts and multiple bends increase resistance and reduce airflow
- Sizing is not determined by floor area alone; it follows a moisture-load assessment
Technical notes
- Dehumidification capacity and airflow are approved ONYX NOVA product data. They are not taken from the manufacturer installation manual, which does not publish a performance table.
- Recommended and maximum fresh-air volumes are application guidance previously confirmed by the manufacturer. They describe outdoor air mixed with indoor return air at the unit inlet, not the total supply airflow.
- Final fresh-air volume depends on outdoor conditions, indoor return-air mixing, duct design and engineering assessment.
- Filtration configuration is confirmed per project; only stages included in the supplied configuration are provided.
Technical note: Final equipment selection and expected performance depend on site conditions, system design, outdoor-air conditions and professional assessment.
Talk to a specialist
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Solutions
Where this unit is typically applied.
Villas and Private Residences
Zoned humidity control across floors, wardrobes, wet areas and rarely used rooms.
Read moreApartments and Penthouses
Independent humidity control for apartments and penthouses, concealed above the ceiling.
Read moreNew Construction and Renovation
Plan humidity control before ceilings close.
Read moreRelated reading
Background reading.
Why does mould return after cleaning and repainting?
Cleaning removes what is visible on the surface. If the conditions that allowed growth remain, the same surfaces stay at risk.
Read articleWhy Your AC May Cool the Room but Not Control Humidity
A room can feel cool and still have excessive humidity. Cooling the air and removing moisture from it are related, but they are not the same HVAC task.
Read articleCore versus Aero: which system is appropriate?
Core is recirculation-led with controlled fresh-air mixing. Aero is fresh-air-oriented with integrated energy recovery.
Read article