When considering air conditioner installation in Perth, homeowners and businesses are often faced with the choice between ductless mini-split systems and traditional ducted systems. Each option has unique installation requirements, benefits, and limitations, making it important to weigh these factors carefully. This article explores the differences to help you make an informed decision.

Installation Process

Ducted Systems

Traditional ducted systems rely on an extensive network of ducts that distribute air throughout the building. Installation involves several detailed steps:

  1. Designing and Constructing Ductwork:
    • Ductwork must be carefully planned to ensure efficient airflow and temperature distribution.
    • Installation often requires extensive modification to ceilings, walls, or floors, which can disrupt daily activities.
  2. Placement of a Central Unit:
    • The central air conditioning unit is typically installed in a basement, attic, or utility room. This requires sufficient space and may involve structural considerations to support the equipment’s weight.
  3. Sealing and Insulating the Ducts:
    • Proper sealing is critical to avoid air leakage, which can significantly reduce system efficiency.
    • Insulation helps maintain consistent temperatures and prevents energy loss, especially in ducts running through unconditioned spaces like attics.
  4. Electrical and System Connections:
    • Installing a central control panel, thermostat, and electrical wiring adds to the complexity. The system must be properly calibrated to balance air distribution across all zones.
  5. Testing and Commissioning:
    • After installation, the system undergoes thorough testing to ensure even airflow, correct temperature settings, and overall functionality.

Due to the invasive nature of this process, ducted systems are best suited to new constructions or major renovations where ductwork can be seamlessly integrated during the building phase.

Ductless Mini-Splits

Ductless systems, as the name suggests, do not require ductwork, making the installation process significantly simpler:

  1. Mounting Indoor Units:
    • Each zone requires an indoor air-handling unit, which is typically mounted on a wall or ceiling. These units are compact and designed for easy installation.
  2. Connecting to an Outdoor Compressor:
    • Indoor units are connected to a single outdoor compressor through refrigerant lines, drain pipes, and power cables. These lines are routed through small holes drilled into the wall, typically no larger than 7-10 cm in diameter.
  3. Minimal Structural Changes:
    • Since ductwork is unnecessary, installation requires minimal disruption to the building structure. This makes it ideal for older homes or properties where adding ducts would be impractical.
  4. Zoning Capabilities:
    • Each indoor unit operates independently, allowing for customised temperature settings in each room. This reduces installation complexity compared to setting up multiple zones in ducted systems.
  5. Quick Setup and Testing:
    • Installation is typically faster, often completed within a single day for small to medium-sized setups. After mounting and connecting the units, the system undergoes a simple testing process to ensure functionality.

The ease and speed of installation make ductless mini-splits a cost-effective solution for retrofits, smaller spaces, or buildings with architectural limitations where ductwork isn’t feasible. Additionally, the lack of ducts eliminates potential energy losses due to leaks or poor insulation, further enhancing efficiency.

Benefits

Ducted Systems

  • Uniform Cooling: Ducted systems provide even cooling throughout the entire building, ensuring consistent comfort.
  • Aesthetics: Hidden ductwork keeps the system discreet, with only vents visible.
  • Value for Larger Homes: These systems are often more efficient for large spaces.

Ductless Systems

  • Flexible Installation: The lack of ductwork means ductless systems can be installed in a variety of locations, including homes with limited space.
  • Energy Efficiency: Mini-splits can cool specific zones, reducing energy usage and costs.
  • Quick Installation: The minimally invasive process ensures faster completion compared to ducted systems.

Drawbacks

Ducted Systems

  • Higher Installation Costs: Constructing and installing ductwork increases both time and expense.
  • Potential for Energy Loss: Leaky or poorly insulated ducts can reduce efficiency.
  • Limited Zoning: Customising temperatures for specific areas is difficult without additional equipment.

Ductless Systems

  • Visible Components: The indoor units of ductless systems are visible, which may not suit all interior designs.
  • Higher Initial Costs for Small Homes: The cost of multiple indoor units can add up, especially for large spaces requiring multiple zones.
  • Maintenance: Filters in mini-split systems require regular cleaning to maintain efficiency.
Canning Vale Air conditioning

Which System is Right for You?

When deciding on an air conditioner installation in Perth, consider the following:

  • Building Type: For new constructions or large homes, ducted systems may provide better value and aesthetics. For retrofits or smaller properties, ductless systems offer a cost-effective and energy-efficient solution.
  • Installation Budget: Ducted systems require more upfront investment, particularly for ductwork. Ductless systems, while initially costlier for multi-zone setups, save on labour and renovation costs.
  • Energy Efficiency Goals: If energy savings are a priority, the zoned cooling of ductless mini-splits is an attractive feature.

Conclusion

Choosing between ductless mini-splits and ducted systems depends on your specific requirements, budget, and property type. Whether you’re upgrading an existing system or starting fresh, understanding the installation considerations and long-term benefits will ensure you make the right choice. For expert advice and professional air conditioner installation in Perth, contact a trusted local installer to discuss your options and receive tailored recommendations.

author avatar
Daniel Gilpin
Daniel is the founder of Gildan Air & Electrical, HVAC & Air Conditioning Contractor for Perth and surrounds.