Product Identification
Bonaire Optima Series III MK2 5.3kW Split System – STH053S1AI / STH053S1AE
Indoor unit: STH053S1AI |
Outdoor unit: STH053S1AE |
System type: Reverse cycle wall-mounted split system
Product Overview
The Bonaire 5.3kW split system is a powerful reverse cycle air conditioner designed to provide reliable heating and cooling for living rooms, open-plan areas and larger residential spaces. This complete system combines the STH053S1AI indoor unit with the matching STH053S1AE outdoor unit, providing both essential components as one matched product.
With a rated cooling capacity of 5.3kW and a rated heating capacity of 5.3kW, the system delivers balanced year-round performance. It provides cooling during Melbourne’s warmer months and reverse cycle heating when temperatures fall, allowing one air conditioning system to support comfort throughout the year.
The Bonaire Optima Series III MK2 combines inverter operation with Wi-Fi connectivity, 3D airflow, self-cleaning technology, dehumidification, R32 refrigerant and an “I Feel” temperature-sensing function. It also carries Bonaire’s industry-leading seven-year parts and labour warranty, subject to the manufacturer’s current eligibility and warranty conditions.
This model may suit households that require more capacity than a smaller bedroom air conditioner can provide. However, the correct system size should be confirmed before purchase because room size, insulation, glazing, ceiling height and sun exposure can significantly affect cooling and heating requirements.
Quick Highlights
- Cooling capacity: 5.3kW rated, with a 1.0–6.8kW operating range
- Heating capacity: 5.3kW rated, with a 1.0–5.8kW operating range
- Complete system: Matched indoor and outdoor units supplied together
- Smart control: Wi-Fi connectivity for compatible mobile devices
- System operation: Reverse cycle inverter heating and cooling
- Refrigerant: R32 refrigerant
- Comfort features: 3D airflow, dehumidification and “I Feel” sensing
- Protection: Gold Fin coating for additional corrosion resistance
- Warranty: Seven-year parts and labour warranty, subject to Bonaire’s terms
Why Choose the Bonaire 5.3kW Split System?
The Bonaire STH053S1AI 5.3kW split system offers the additional capacity required by many family living rooms and larger residential areas. Its rated 5.3kW cooling capacity can help maintain comfortable indoor conditions during warmer weather, while its 5.3kW heating capacity provides warmth during cooler periods.
Inverter technology allows the system to vary its output as the room approaches the selected temperature. Rather than operating only at maximum output and then stopping, the compressor can adjust its operation according to demand. This supports more consistent comfort and can reduce unnecessary energy consumption.
The system has a published cooling operating range of approximately 1.0kW to 6.8kW and a heating operating range of approximately 1.0kW to 5.8kW. Actual performance and power consumption depend on room conditions, outdoor temperature, system settings, installation quality and the building’s thermal performance.
Key Features
Reverse Cycle Heating and Cooling
The system provides cooling and heating through one matched indoor and outdoor combination, supporting comfortable indoor conditions throughout changing seasons.
Smart Wi-Fi Control
Wi-Fi functionality allows compatible operating controls to be accessed through a suitable smartphone or tablet after the air conditioner has been connected and configured correctly.
Inverter Technology
Inverter operation allows the air conditioner to adjust its capacity in response to changing room demand. This can support steadier temperature control and more efficient operation.
R32 Refrigerant
The system uses R32 refrigerant, which is commonly used in current-generation residential air conditioners. All refrigerant work must be completed by an appropriately licensed professional.
3D Airflow
The 3D airflow function helps distribute conditioned air throughout the room, supporting more balanced comfort across a larger occupied area.
“I Feel” Temperature Sensing
The “I Feel” function can help the system respond to temperature conditions near the sensing location instead of relying entirely on the sensor within the wall-mounted indoor unit.
Dehumidification Mode
A dedicated dehumidification function can help reduce excess indoor moisture during humid weather, improving comfort without always requiring maximum cooling.
Self-Cleaning Function
Self-cleaning technology assists with maintaining the indoor unit. Routine filter cleaning and professional servicing are still necessary according to the owner’s manual.
Gold Fin Coating
Gold Fin coating provides added corrosion resistance for the outdoor heat exchanger. Correct installation positioning and regular maintenance remain important.
DRED Enabled
Demand Response Enabling Device compatibility allows the system to support applicable demand-response programs where suitable services and connections are available.
Industry-Leading 7-Year Warranty
Bonaire promotes a comprehensive seven-year parts and labour warranty for eligible Series 3 systems. Warranty eligibility may depend on professional installation, product registration, proof of purchase, servicing requirements and compliance with the manufacturer’s current warranty terms. Customers should review the latest Bonaire warranty documentation and retain all purchase and installation records.
Ideal Applications
- Family living rooms
- Larger bedrooms and master suites
- Dining and lounge areas
- Medium-sized open-plan residential spaces
- Apartments and townhouses requiring additional capacity
- Replacement of an older, similar-capacity split system
A 5.3kW air conditioner may be suitable for a medium or larger room, but professional capacity selection is recommended. Large windows, direct afternoon sunlight, poor insulation, high ceilings, open doorways and room orientation can increase the capacity required.
Technical Specifications
| Specification | Details |
|---|---|
| Brand | Bonaire |
| Series | Optima Series III MK2 |
| Indoor model | STH053S1AI |
| Outdoor model | STH053S1AE |
| Rated cooling capacity | 5.3kW |
| Cooling range | 1.0–6.8kW |
| Rated heating capacity | 5.3kW |
| Heating range | 1.0–5.8kW |
| Cooling input power | 1.20kW rated |
| Heating input power | 1.29kW rated |
| Refrigerant | R32 |
| Power supply | 220–240V, 50Hz |
| Breaker size | 16A |
| Indoor sound power level | 59dB(A) |
| Outdoor sound power level | 65dB(A) |
| Indoor dimensions | 1097 × 332 × 222mm |
| Indoor net weight | 13kg |
| Outdoor dimensions | 927 × 380 × 699mm |
| Outdoor net weight | 37kg |
| Liquid pipe size | 6.35mm (1/4 inch) |
| Gas pipe size | 12.7mm (1/2 inch) |
| Factory pre-charge | Up to 15 metres |
| Maximum pipe distance | 20m length / 15m height |
Installation and Compatibility
This product is supplied as one matched air conditioning system containing the STH053S1AI indoor unit and STH053S1AE outdoor unit. Although each component has its own model number, a quantity of one represents one complete indoor and outdoor combination.
Installation must be completed by a suitably licensed air conditioning professional. Final requirements depend on pipe length, electrical access, wall construction, drainage, outdoor-unit placement, mounting method and overall site accessibility.
Installation is included only when expressly stated in the written quotation. Additional electrical work, pipework, mounting equipment, condensate management or difficult-access work may affect the final installed price.
Frequently Asked Questions
Does this product include both indoor and outdoor units?
Yes. One complete product includes one STH053S1AI indoor unit and one matching STH053S1AE outdoor unit.
Is this model 5.2kW or 5.3kW?
Some supplier documents may describe it as 5.2kW, but Bonaire’s current technical information lists the STH053 system with 5.3kW rated cooling capacity.
Does the system provide heating?
Yes. It is a reverse cycle system with 5.3kW rated cooling and 5.3kW rated heating capacity.
Does this product have a seven-year warranty?
Bonaire promotes a seven-year parts and labour warranty for eligible systems. Current eligibility, installation, registration, servicing and warranty conditions apply.
Can the air conditioner be controlled through Wi-Fi?
Yes. Smart Wi-Fi functionality is included. A suitable Wi-Fi connection, compatible device and correct application setup may be required.
Is installation included?
Installation is included only when clearly stated in the quotation. Contact Air Conditioning Trade for product supply, delivery and installation options.
Why Buy From Air Conditioning Trade?
Air Conditioning Trade supplies dependable air conditioning products to homeowners, installers and trade customers across Melbourne. Request current pricing, stock availability, Melbourne delivery information and professional installation support for the Bonaire Optima Series III MK2 5.3kW split system.
Manufacturer information:
View the Bonaire split-system product range
Product features, capacities, warranty eligibility and technical specifications should be confirmed against current Bonaire documentation before purchase or installation.
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