Commercial Ducted Hvac System Setup
RMA EngineeringHVAC engineering

Comfort systems designed around the building.

Ducted, multi-head split and VRV / VRF air conditioning for Sydney homes and businesses, supported by structured repair, servicing, refrigerant work and commissioning.

Ducted air conditioning systems
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Ducted air conditioning systems

Ducted air conditioning delivers discreet whole-property comfort through concealed ductwork and carefully positioned supply outlets. We consider capacity, return-air location, ceiling space, acoustic impact, zoning and controller strategy so the system suits how the property is actually used.

  • Residential and commercial system design
  • Return-air, diffuser and ductwork coordination
  • Zoning, sensors and controller integration
  • New builds, major upgrades and replacements
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Multi-head split systems

A multi-head system connects several indoor units to one outdoor unit, reducing external equipment while preserving room-by-room control. Correct selection depends on simultaneous loads, pipe routes, condensate management, service access and the preferred location of each indoor unit.

  • Reduced outdoor-unit footprint
  • Independent temperature control by room
  • Capacity matching and pipe-route planning
  • Wall, access and drainage coordination
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Multi-head split systems
VRV / VRF systems
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VRV / VRF systems

VRV and VRF systems provide efficient, scalable control across many zones and changing occupancy conditions. These projects require disciplined coordination of outdoor and indoor equipment, refrigerant pipework, branch components, controls, electrical services and commissioning data.

  • Commercial and premium residential design
  • Refrigerant pipework and equipment coordination
  • Central and local control integration
  • Pressure testing, setup and commissioning
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Repair, servicing and commissioning

When an air conditioning system underperforms, the cause may involve airflow, refrigerant charge, controls, sensors, drainage, electrical components or equipment condition. RMA Engineering follows a structured diagnostic process before recommending repair, regassing, adjustment or replacement.

  • Fault finding and component repair
  • Refrigerant checks and gas regassing where required
  • Cleaning, drainage and airflow assessment
  • Control testing and commissioning records
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Repair, servicing and commissioning

System selection

The right equipment starts with the right questions.

Brand and price matter, but building conditions determine whether a system can perform quietly, efficiently and reliably.

Capacity and layout

Heat load, room use, ceiling space and building orientation shape system capacity and distribution.

Noise and placement

Indoor and outdoor equipment should protect comfort, neighbours, access and visual presentation.

Control strategy

Zoning, sensors, schedules and user controls should match how the property operates.

Serviceability

Filters, equipment, drains and controls need safe access for future maintenance and repair.

Useful answers

Frequently asked questions.

Practical information before you request a quote or arrange a site assessment.

What is the difference between ducted and multi-head split air conditioning?

Ducted systems distribute conditioned air through concealed ducts and outlets, while multi-head systems connect several wall-mounted indoor units to one outdoor unit. The right option depends on the building, available space, zoning needs and budget.

Do you repair and regas air conditioning systems?

Yes. RMA Engineering provides fault diagnosis, repair, servicing, refrigerant checks, gas regassing where appropriate and system commissioning.

Do you install VRV and VRF systems?

Yes. RMA Engineering works with VRV and VRF systems for multi-zone commercial and premium residential applications, including pipework, controls, testing and commissioning.

Start with a clear scope

Need a reliable HVAC or CCTV solution?

Tell us about the property, the system and the outcome you need. We will help define the next practical step.

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