The Carrier 42QSM125D8S / 38QSM125D8S 12.3kW Inverter Slim Ducted System is a powerful reverse cycle ducted air conditioning system designed for large homes, open-plan living areas, offices, and light commercial applications. With a slim concealed indoor unit, inverter technology, and strong static pressure performance, it delivers reliable year-round comfort while remaining discreetly hidden in the ceiling space. With 12.3kW cooling and 13.0kW heating capacity, this model is ideal for large open-plan lounge and dining areas, multi-room homes, offices, retail spaces, and commercial fit-outs around 70–110m² depending on insulation and layout. Carrier’s inverter compressor technology helps maintain more stable temperatures while reducing energy consumption and running costs.

Key Features & Benefits

Slim Ducted Design

The indoor unit features a slim profile measuring approximately 300mm high, making it easier to install in tighter ceiling cavities where space is limited. Despite its compact height, it still delivers strong airflow performance for larger spaces. The indoor unit dimensions are approximately 1200mm wide, 874mm deep, and 300mm high. Powerful Heating & Cooling Capacity The system delivers 12.3kW of cooling and 13.0kW of heating, with a wide operating range that allows it to modulate between 3.75kW and 15.24kW in cooling mode and 3.08kW to 18.46kW in heating mode. This helps the system adapt to varying room loads more efficiently.

Advanced Inverter Technology

Carrier’s inverter system continuously adjusts compressor speed to maintain a more stable indoor temperature while reducing power consumption and operating noise compared to fixed-speed systems.

High Static Pressure Performance

The unit offers rated external static pressure of 50Pa with a maximum of 160Pa, allowing it to support longer duct runs and more complex installations across larger homes or commercial spaces.

Strong Airflow Performance

The indoor unit can deliver airflow up to 525 litres per second on high speed, helping conditioned air reach multiple rooms evenly and efficiently. Carrier’s constant air volume technology helps maintain consistent airflow even when duct pressure changes.

Wide Operating Temperature Range

The system can operate in cooling mode from 0°C to 50°C outdoor temperature and in heating mode from -20°C to 24°C, making it suitable for a wide range of Australian climates.

Long Pipe Run Capability

The Carrier slim ducted system supports pipe lengths up to 75 metres and height differences up to 30 metres, making it suitable for multi-storey homes, offices, and larger commercial projects.

Compact Outdoor Unit

The outdoor unit measures approximately 952mm wide, 415mm deep, and 1333mm high, helping maximise installation flexibility while still delivering strong performance.

R32 Refrigerant

The system uses modern R32 refrigerant for improved energy efficiency and lower environmental impact compared to older refrigerants. 1-Phase Power Supply This model operates on standard 220–240V single-phase power, making it suitable for many residential and light commercial installations without requiring three-phase power. 5-Year Manufacturer Warranty Carrier ducted systems are backed by a 5-year manufacturer warranty when installed by a licensed professional and maintained according to manufacturer guidelines.

Ideal Applications

•  Large open-plan living areas
• Family rooms
• Multi-room homes
• Offices
• Retail spaces
• Light commercial premises

Why Choose the Carrier 12.3kW Slim Ducted System?

The Carrier 42QSM125D8S / 38QSM125D8S is a high-capacity ducted solution designed for larger spaces that need powerful, discreet, and efficient climate control. With its slim indoor profile, inverter technology, strong airflow, and long pipe-run flexibility, it is an excellent option for larger homes and commercial projects where ceiling space may be limited.