The Rinnai DINLR20Z7 / DONSR20Z9 is a large-capacity reverse cycle ducted air conditioning system designed for very large homes, offices, retail spaces, and commercial properties that require strong airflow and long duct runs. With a concealed ceiling-mounted indoor unit and high static pressure capability, it provides discreet whole-home comfort without the need for multiple wall-mounted systems. It includes a wired programmable controller for simple day-to-day operation. With 20.0kW cooling and 20.0kW heating capacity, this model is ideal for very large open-plan living areas, multi-room homes, offices, and commercial spaces around 90–130m² depending on insulation and layout. The inverter compressor adjusts output automatically to maintain more stable temperatures and lower running costs.

Key Features & Benefits

High Static Pressure Performance

The system supports a maximum external static pressure of up to 250Pa, making it suitable for long duct runs, multiple outlets, and larger zoned ducted systems. Indoor airflow reaches approximately 1203 litres per second on high fan speed, helping maintain even air distribution throughout larger homes and commercial spaces.

3-Phase Power Supply

This model operates on 415V 3-phase power, making it suitable for larger homes and commercial properties with 3-phase electrical supply. Rated input current is approximately 9.09 amps in cooling mode and 8.9 amps in heating mode, with a recommended 30-amp circuit breaker.

3D DC Inverter Technology

The Rinnai DRCi system uses a DC inverter compressor and indoor fan motors to provide faster temperature control, smoother operation, and improved efficiency compared to fixed-speed systems. It achieves an EER of approximately 3.29 and a COP of approximately 3.32.

Two-Piece Indoor Unit Design

The indoor fan coil arrives in a two-piece construction, allowing for easier handling and installation in roof cavities with limited access. This is especially useful for larger homes and retrofit installations where roof space is tight.

Programmable Wired Controller Included

The system comes complete with an easy-to-use wired programmable controller, allowing users to manage temperature settings, timers, operating modes, and fan speeds from a central location.

Wide Operating Range

The unit can operate in outdoor temperatures from -15°C to 46°C in cooling mode and from -15°C to 24°C in heating mode, making it suitable for Australian climate conditions year-round.

Compact Design for Its Capacity

The indoor unit measures approximately 1454mm wide, 931mm deep, and 515mm high, while the outdoor unit measures approximately 1120mm wide, 528mm deep, and 1558mm high. Despite its large capacity, the system remains compact enough for many larger residential and commercial installations.

Long Pipe Run Capability

The system supports pipe runs of up to 30 metres with a maximum height difference of up to 30 metres between indoor and outdoor units, providing installers with flexibility for larger homes and commercial layouts.

5 Year Warranty

Rinnai provides a 5-year warranty on its ducted air conditioning systems, helping provide long-term peace of mind for residential and commercial installations.

Ideal Applications

• Very large homes
• Open-plan living areas
• Offices
• Retail spaces
• Commercial buildings
• Homes with long duct runs
• Zoned ducted systems

Why Choose the Rinnai DINLR20Z7 / DONSR20Z9?

The Rinnai DINLR20Z7 / DONSR20Z9 is a powerful and efficient ducted solution designed for larger homes and commercial spaces that require strong airflow, fast temperature control, and reliable whole-building comfort. With its high static pressure performance, 3-phase power supply, two-piece indoor unit construction, and programmable wired controller, it is an excellent option for demanding ducted installations.