Rinnai MON6H19B1TA 19 kW Multi Split Air Conditioner Review
Major Benefits
You’re likely comparing shortlisted systems, checking whether capacity claims hold up and making sure you don’t lock yourself into an expensive mismatch. And that’s totally okay because it’s a significant investment and you don’t wanna end up buying the wrong system only to sacrifice your comfort later on.
So, we are reviewing Rinnai MON6H19B1TA 19 kW Multi-Split System, covering how it performs, where it makes sense, what ownership looks like long term and whether it is eligible for an air conditioner rebate in Victoria.
Read this blog till the end to take an informed decision about the air conditioning system in Victoria.
Table of Contents
- Overview of the Rinnai MON6H19B1TA Multi-split System
- Rinnai MON6H18B1TA: Heating & Cooling Performance
- Key Features of the Rinnai MON6H19B1TA
- Warranty and After-Sales Services
- Is the MON6H19B1TA Eligible for the Victorian Energy Rebate?
- Is the Rinnai MON6H19B1TA Right for Your Home?
- Conclusion
- Frequently Asked Questions
The Rinnai MON6H18B1TA is an inverter-driven multi-split air conditioning system designed for residential applications that require independent temperature control in multiple rooms from a single outdoor unit. Unlike traditional single split systems, this model allows several indoor units to operate off one outdoor condenser, reducing exterior clutter while maintaining zoning flexibility.
This system supports up to six indoor units, making it suitable for homes with multiple bedrooms, living zones or mixed-use spaces such as home offices and guest rooms. Each indoor unit can be controlled independently, allowing different rooms to operate at different temperatures depending on usage.
Rinnai is an established HVAC manufacturer with a long-standing presence in Australia. Its air conditioning systems are designed for local climate conditions and distributed through authorised Australian suppliers, with installation and servicing handled by licensed professionals.
Performance is where system design meets real-world conditions. The MON6H19B1TA is engineered to handle both cooling and heating loads across multiple zones without compromising consistency.
Cooling Performance
With a 19 kW cooling capacity, the MON6H19B1TA is suited to cooling several rooms at once in medium to large-sized residential homes. This capacity allows the system to manage simultaneous demand from living areas, bedrooms and secondary spaces without significant performance drop-off.
Rather than delivering maximum output constantly, the inverter system distributes capacity across active zones. This means rooms that require less cooling do not draw unnecessary power, while higher-load areas continue to receive adequate airflow and temperature control.
In warmer months, this balance helps maintain stable indoor conditions even during extended periods of high outdoor temperatures.
Heating Performance
On the heating side, the system delivers up to 21.5 kW of heating capacity, providing sufficient output for winter operation across multiple rooms. The inverter compressor allows a gradual ramp-up rather than abrupt heat bursts, which supports consistent warmth throughout the home.
This capacity makes the system suitable for homes where heating demand is spread across several zones rather than concentrated in a single living area.
The features below reflect how the MON6H19B1TA is engineered to manage multiple indoor demands while maintaining efficiency and control.
Support for Up to Six Indoor Units
The MON6H19B1TA can connect up to six indoor units to a single outdoor system. This configuration is particularly useful in homes where multiple rooms require conditioning but outdoor space is limited. Instead of installing multiple outdoor units along exterior walls or balconies, a single condenser manages all connected indoor zones.
This setup also allows homeowners to expand over time. Additional indoor units can be added later (within system limits), making the system adaptable to renovations or changing household needs.
Twin Rotary Inverter Compressor
At the core of the system is a twin rotary inverter compressor, designed to adjust output dynamically rather than operating at fixed speeds. Instead of switching on and off repeatedly, the compressor modulates its capacity based on demand. This helps maintain more stable indoor temperatures, reduces power spikes and minimises operational noise. It also contributes to smoother performance when multiple indoor units are running simultaneously.
Wide Operating Range
The MON6H19B1TA is built to operate across a wide range of outdoor temperatures. This allows the system to remain functional during both extreme summer heat and colder winter conditions.
For households in climates that experience temperature swings across seasons, this design supports year-round usability without relying on supplementary heating or cooling systems.
Eco-Friendly R32 Refrigerant
This system uses R32 refrigerant, which has a lower global warming potential compared to older refrigerants such as R410A. R32 also allows for more efficient heat transfer, meaning the system can achieve the same performance levels with a smaller refrigerant charge.
From a regulatory and environmental perspective, R32 aligns with current sustainability standards and long-term compliance requirements.
Rinnai MON6H19B1TA Specifications
Warranty coverage plays an important role in long-term ownership, particularly for systems designed to operate across multiple zones.
In Australia, the Rinnai MON6H19B1TA is backed by a 7-year warranty, provided the system is installed and serviced in accordance with Rinnai’s requirements. Warranty coverage typically applies when:
- Installation is carried out by a licensed and authorised professional
- The system is installed according to the manufacturer's guidelines
- Ongoing servicing and maintenance requirements are met
Before installation, it is advisable to confirm the full warranty scope, including parts coverage and service pathways, with the supplier or installer. This ensures clarity around long-term support and compliance.
The Rinnai MON6H19B1TA may be eligible under the Victorian Energy Upgrades (VEU) program, subject to meeting program conditions at the time of installation.
Eligibility for the air conditioner rebate in Victoria generally depends on the following factors:
- The property is located in Victoria
- An existing inefficient heating or cooling system is being replaced
- Installation is carried out by a VEU-accredited provider
- The selected system appears on the approved product list
Rebate eligibility can vary based on property type, existing system configuration and installation details. For this reason, eligibility should always be confirmed with the help of an accredited provider in Australia.
Whether this system is suitable depends largely on layout, usage patterns and long-term expectations.
The MON6H19B1TA is best aligned with homes that:
- Require conditioning across multiple rooms
- Have limited outdoor space for multiple condensers
- Prefer independent temperature control by zone
- Plan for long-term occupancy rather than short-term use
Homes with fewer rooms or lower simultaneous usage may find smaller systems more appropriate, while very large residences may require higher-capacity or VRF-style solutions.
To know the right air conditioning system for your home, Book a free consultation with us.
The Rinnai MON6H19B1TA is a well-engineered 19 kW multi-split system designed for residential environments that require flexibility, zoning and reliable year-round performance. Its ability to support up to six indoor units, combined with inverter technology and R32 refrigerant, positions it as a practical option for medium to large homes
As with any air conditioning system, suitability depends on individual requirements, layout and installation conditions. Evaluating these factors carefully helps ensure the system delivers the intended comfort and efficiency over its full lifespan.
1. How many indoor units can the Rinnai MON6H19B1TA support?
The system supports up to six indoor units connected to a single outdoor unit.
2. What is the cooling capacity of this system?
The MON6H19B1TA provides 19 kW of cooling capacity.
3. How much heating output does it deliver?
It offers up to 21.5 kW of heating capacity.
4. Does this system use inverter technology?
Yes, it uses a twin rotary inverter compressor for variable output and efficiency.
5. What refrigerant does it use?
The system operates on R32 refrigerant.
6. Is it eligible for Victorian energy rebates?
Eligibility may apply under the VEU program, subject to installation conditions and approval criteria.
7. What warranty does the system include?
Rinnai provides a 7-year warranty in Australia when installed and serviced correctly.
