Ducted vs Split System Air Conditioning: Which Is Right for Your Victorian Home?
The short answer: ducted air conditioning suits whole-home comfort in larger properties, while split systems are better for cooling or heating individual rooms or zones. The right choice depends on your home’s size, layout, budget, and how many rooms you actually need to condition.
Here’s everything Victorian homeowners need to know before choosing.
What Is a Ducted Air Conditioning System?
A ducted system uses a single outdoor unit connected to a concealed network of ceiling ducts that deliver conditioned air through outlets in each room. There are no visible wall units just discreet ceiling vents throughout the home.
Most ducted systems come with zone control, allowing you to turn off airflow to rooms you’re not using. This keeps running costs manageable even for larger homes.
How ducted works:
- One outdoor compressor unit (usually on the roof or at the side of the home)
- A central air handling unit connected to ceiling ducts
- Outlets (vents) in each room deliver heated or cooled air
- A controller lets you manage temperature and zones
What Is a Split System Air Conditioner?
A split system consists of an indoor wall-mounted unit and an outdoor compressor. Each unit conditions the room it’s installed in. For multi-room coverage, you can install multiple single split systems — or opt for a multi-split, which connects several indoor units to one outdoor unit.
Split systems are the most common form of air conditioning in Australian homes. They’re relatively quick to install, widely available, and eligible for VEU rebates in many circumstances.
Ducted vs Split System — Key Differences
| Ducted | Split System | Multi-Split | |
|---|---|---|---|
| Coverage | Whole home | Single room per unit | 2–5 rooms from one outdoor unit |
| Visibility | Hidden — ceiling vents only | Wall-mounted indoor unit | Wall-mounted indoor units |
| Installation | 1–3 days, ceiling access required | 3–5 hours per unit | 1–2 days |
| Zone control | Yes — by room or zone | Only by unit | Yes — per indoor unit |
| VEU rebate | Yes (replacing gas ducted) | Yes (replacing resistive heaters) | Eligible in many cases |
| Best for | Homes 150sqm+ | Apartments, individual rooms | Townhouses, 2–4 rooms |
When to Choose Ducted
Ducted air conditioning makes the most sense when:
Your home is over 150sqm. For larger homes, installing enough split systems to cover every room costs more than a ducted system — and looks messier. A ducted system with zone control is usually more cost-effective and delivers a more consistent result.
You’re replacing gas ducted heating. If you already have gas ducted heating, the existing ductwork and ceiling infrastructure can often be reused or adapted for a reverse cycle ducted system. This significantly reduces installation time and cost — and the upgrade typically qualifies for a VEU rebate.
You want a clean aesthetic. No wall units. No remotes on every wall. Ducted delivers whole-home comfort with nothing visible except the ceiling vents.
You’re building or renovating. Installing ducted during a build or major renovation is far cheaper and cleaner than retrofitting later.
When to Choose a Split System
Split systems are the better choice when:
You need to cool or heat specific rooms. If you only use 2–3 rooms regularly and don’t need the whole house conditioned, split systems give you targeted comfort without running a whole-home system.
Your home is under 120sqm. For smaller homes, one or two split systems can cover your needs at a fraction of the cost of a ducted install.
You’re in an apartment or townhouse. Ducted installation requires ceiling cavity access that many apartments and two-storey townhouses can’t easily provide. Split systems are straightforward to install in most configurations.
You want room-by-room control. Each split system runs independently, so people in different rooms can set their own temperature — something ducted zone systems can do but at higher cost.
What About Multi-Split Systems?
A multi-split (or multi-head split) connects 2–5 indoor units to a single outdoor unit. It’s the middle ground between a single split system and ducted — you get room-by-room control without ceiling ductwork, and only one outdoor unit instead of several.
Multi-split systems are ideal for:
- Townhouses or homes where ducted installation isn’t practical
- Homes needing independent control across 2–4 rooms
- Situations where multiple separate outdoor units aren’t possible (body corporate restrictions, limited outdoor space)
VEU Rebates — Which Systems Are Eligible?
Under the Victorian Energy Upgrades (VEU) program, rebates are available for:
- Ducted reverse cycle systems replacing gas ducted heating — one of the highest-value rebate categories
- Single and multi-split systems replacing resistive electric heaters (bar heaters, panel heaters) — widely eligible
- Heat pump systems of all types — eligibility depends on what you’re replacing
Evitech checks your eligibility as part of every free quote. The rebate is applied upfront — you don’t claim it later.
Get a Free Assessment
Ready to find the right system for your home? Evitech provides a free assessment — we look at your home, your existing heating and cooling setup, and your usage patterns before recommending anything. VEU rebate eligibility confirmed as part of every quote.
Call: +1300 137 974
Email:enquiries@evitech.com.au
Frequently Asked Questions
Can I get a VEU rebate for a split system air conditioner?
Yes — replacing certain resistive electric heaters with a reverse cycle split system is VEU-eligible. Whether your existing heating qualifies depends on the type and age of the current system. Evitech checks this at no cost.