The Daikin FDYQN250LBV1 / RZQ250LY1 is a high-capacity reverse cycle ducted system designed for very large homes, commercial spaces, and multi-storey properties with 3-phase power available. With inverter technology, powerful airflow, and a compact indoor design for its class, it delivers discreet whole-building climate control while remaining hidden within the ceiling space.
With 23.5kW cooling and 26.8kW heating capacity, this model is ideal for very large homes, offices, retail spaces, showrooms, and properties around 120–180m² depending on insulation and layout. The inverter compressor can modulate output from 15.0kW up to 23.5kW in cooling mode and from 16.8kW up to 26.8kW in heating mode, helping improve efficiency and maintain stable indoor temperatures.
Key Features & Benefits
3-Phase Power Supply
This model operates on 380–415V 3-phase power, making it suitable for larger homes and commercial buildings with 3-phase electrical supply. It helps distribute electrical load more effectively across circuits compared to very large single-phase systems.
Advanced Inverter Technology
Daikin’s inverter technology continuously adjusts compressor speed to maintain more stable indoor temperatures while reducing power consumption and operating noise. The system uses a hermetically sealed scroll compressor for reliable long-term performance.
Strong Airflow Performance
The unit provides rated airflow of approximately 1400 litres per second, with maximum airflow up to 1600 litres per second. This helps deliver even conditioned air across multiple rooms and very large open-plan spaces. Indoor sound levels are approximately 49.5dBA on high speed.
Compact Indoor Unit Design
Despite its large capacity, the indoor unit is designed to fit within many roof spaces. The indoor unit measures approximately 500mm high, 1430mm wide, and 970mm deep, while the outdoor unit measures around 1680mm high, 930mm wide, and 765mm deep.
Night Quiet Mode
Daikin’s Night Quiet Mode reduces outdoor operating noise during sleeping hours and automatically resumes normal operation in the morning, helping minimise disturbance to occupants and neighbours.
Improved Energy Efficiency
The system delivers an EER of 2.99 and COP of 3.16, with residential TCSPF ratings up to 3.73 in hot climates. Efficiency improvements are achieved through the use of a DC fan motor, cross-pass heat exchanger, and enhanced outdoor coil design.
Long Pipe Run Capability
The system supports refrigerant pipe lengths up to 50 metres, making it suitable for large homes and more complex ducted installations.
15 Fan Speed Settings
The system includes 15 different fan speed settings, allowing installers to fine-tune airflow to suit the ductwork configuration and achieve more balanced airflow throughout the property.
R410A Refrigerant
This model uses R410A refrigerant, which is standard across Daikin’s larger-capacity ducted systems from 18.0kW upwards.
Australian-Made Indoor Unit
The indoor unit is designed and manufactured to Australian and New Zealand standards, helping it withstand harsher summer conditions and demanding residential or commercial applications.
Wired Controller Included
The system is commonly supplied with Daikin’s BRC1E63 wired wall controller, providing simple scheduling, temperature control, and system management.
5-Year Manufacturer Warranty
Daikin ducted systems are backed by a 5-year manufacturer warranty for residential applications when professionally installed and maintained.
- Ideal Applications
- Very large homes
- Multi-storey properties
- Open-plan living areas
- 5+ bedroom homes
- Offices
- Retail and commercial spaces with 3-phase power
Why Choose the Daikin 25kW 3-Phase Inverter Ducted System?
The Daikin FDYQN250LBV1 / RZQ250LY1 is a powerful, efficient, and flexible ducted solution designed for very large homes and commercial spaces that already have 3-phase power available. With strong airflow, inverter technology, Night Quiet Mode, 15 fan settings, and Australian-made indoor unit construction, it is an excellent option for properties needing reliable whole-home climate control.
