When the summer heat kicks in or winter chills creep through your windows, a reliable air conditioning system is a must. But with both ducted and ductless systems available, how do you know which is right for you?
In this guide, we’ll break down the core differences between ducted and ductless air conditioning systems, explore their pros and cons, and help you determine which option aligns best with your space, needs, and lifestyle.
Understanding Ducted and Ductless Systems
Ducted air conditioning systems
A ducted air conditioning system uses a central unit and a series of ductwork to deliver cool or warm air to each room. They are usually installed in the ceiling space and occasionally under the floor. Ducted systems are usually powered by heat pumps and are perfect for cooling or heating the whole house evenly.
Ductless air conditioning systems (aka split or multi-split systems)
Ductless systems operate without ductwork and consist of one or more indoor units connected to an outdoor compressor. You can install a single unit for one room or multiple units for separate rooms. They are typically mounted high on a wall (Hi Wall) or placed near the floor (Floor Console) and are great for heating or cooling specific areas.
Ducted Vs Ductless Air Conditioning Systems: A Quick Breakdown
| Feature | Ducted System | Ductless System |
|---|---|---|
| Whole-Home Comfort | Yes – evenly distributes air through the entire home | No – best for specific rooms or zones |
| Installation Cost | Higher, especially without existing ductwork | Lower – ideal for retrofits or upgrades |
| Design/Aesthetics | Very discreet – only vents are visible | Wall-mounted units are visible |
| Zoning/Room Control | Available – set temperatures for different zones | Available – individual control per unit |
Noise Levels | Very quiet indoors – main unit is outside or in roof space | Quiet, but indoor units produce some sound |
| Flexibility | Less flexible – changes require professional work | Very flexible – units can be added or moved easily |
| Energy Efficiency | Efficient for full-home use | Efficient for targeted use – no duct energy loss |
Ducted or Ductless: Which is Right for You?
There’s no one-size-fits-all answer. The right system depends on how you live, what your home allows for, and how you prioritise comfort, control, and cost.
Ask yourself the following questions:
What stage is your home at—build, reno, or retrofit?
Ducted systems are best suited to new builds or major renovations where ductwork can be integrated cleanly. Ductless units are better for existing homes where minimal disruption is preferred.
How many rooms do you want to heat or cool?
If your goal is to manage the temperature throughout your whole home at once, a ducted system may be more practical. For focused areas like a bedroom, office, or extension, ductless systems offer targeted comfort without overextending coverage.
Are looks a priority?
Ducted vents are nearly invisible and blend into the room. Ductless units are more visible but come in streamlined designs that can complement modern interiors.
What’s your budget mindset—initial vs long-term?
Ducted systems have a higher upfront cost but often add resale appeal and long-term efficiency to larger homes. Ductless units offer a lower entry cost and the freedom to expand over time.
Maintenance and System Lifespan: What to Expect
It’s important to think about the ongoing care your system will need. Ducted and ductless air conditioning systems have different maintenance requirements, and understanding these can help you choose the one that fits your lifestyle and capacity for upkeep.
Ducted systems typically require more centralised maintenance. Because air is distributed through a network of ducts, it’s important to have the return filters vacuumed every three months and changed every year with your annual technicians service to prevent dust, allergens, and debris from building up and preventing the unit from working efficiently.
Ductless systems, also require a similar level of attention. Each indoor unit has its own filter that needs to be cleaned regularly (we recommend each season), especially during high-use seasons. However, this maintenance is usually quick and easy to do yourself. While an annual or biannual service is recommended by a technician to check and maintain the unit is working efficiently.
Still Unsure? New Zealand Heat Pumps Can Help
Whether you’re leaning towards a ducted or ductless air conditioning system, both options offer energy-efficient climate control year-round. The key is choosing the system that best suits your home layout, comfort needs, and lifestyle.
If you need some expert assistance, chat with the team at New Zealand Heat Pumps for tailored advice, installation options, and ongoing support. We’ll help you stay cool in summer and toasty in winter, no matter what kind of system you go with.