Ducted Air Conditioning Adelaide
Ducted air conditioning gives you whole-home heating and cooling from a single outdoor unit, with zone control room-by-room and one quiet inverter compressor doing all the work. A 4-zone, 14kW ducted reverse-cycle retrofit on a standard Adelaide 4-bedroom home runs 2–3 days on-site and lands somewhere between $9,500 and $13,500 supplied and fitted, including commissioning paperwork. It’s the premium option in Adelaide HVAC — and on a home you’ll live in for ten years, the per-zone running cost works out cheaper than four separate split systems left running.
We connect you with the trusted local installer from ARC-licensed ducted specialists inside 24 hours. The form takes 90 seconds, and the quote will spell out the kW capacity, zone count, indoor unit location and the all-in fitted price.
What is ducted reverse-cycle
A ducted reverse-cycle system has three main parts:
- Outdoor unit — single inverter compressor, mounted on the side or rear of the house
- Indoor unit — usually in the roof void, sometimes under the floor for slab-on-ground homes; this is the fan and heat exchanger
- Ducting and zones — flexible insulated ducting runs from the indoor unit to ceiling diffusers in each zone, with motorised dampers controlling which zones run
The “reverse-cycle” part means it heats as well as cools — switching the refrigerant flow direction to extract heat from the outside air on cold days and pump it inside. It’s the dominant whole-home HVAC class in Adelaide because the same system covers both the 41°C summer days and the 4°C winter mornings.
Why ducted over splits
The right call depends on how you actually use the house:
Ducted suits:
- 4+ rooms run together regularly (most family homes)
- Whole-house morning warm-up in winter and evening cool-down in summer
- A budget of $9,000+ for the system
- A roof void with at least 1.2m clearance for the indoor unit and ducting
- Zone scheduling — kids’ rooms cool overnight, living areas cool through the evening
Splits suit:
- 1–4 rooms cooled separately rather than together
- Heritage ceilings with no roof void
- A tighter budget — splits start under $2,000 fitted
The ducted vs split comparison walks through the call in detail.
Indicative ducted pricing in Adelaide
| Capacity | Zones | Typical home | Fitted price |
|---|---|---|---|
| 10kW | 3 zones | Small 3-bed | $7,500–$9,500 |
| 14kW | 4 zones | Standard 4-bed | $9,500–$13,500 |
| 16kW | 5 zones | Larger 4-bed | $11,500–$15,000 |
| 18kW | 6 zones | 5-bed / 2-storey | $12,500–$16,500 |
| 20kW+ | 7+ zones | Very large home | $14,500–$22,000 |
These are real Adelaide ranges. Heritage retrofits (no roof void, decorative ceilings) push higher; new-build installs at frame stage push lower. Brand premium adds another $500–$2,000 for top-tier Daikin or Mitsubishi over mid-range options.
Brands we install (ducted focus)
- Daikin — the AU ducted-market leader. Premium Inverter and Ducted Reverse-Cycle ranges.
- Mitsubishi Electric — Bronte Ducted, City Multi for larger homes. Cold-climate FH for the Hills.
- Fujitsu — mid-priced ducted with a solid reputation.
- Actron Air — Australian-made, popular for ducted; the trusted matched installer includes Actron-authorised installers.
Where the trusted matched installer holds brand-tier authorisation (Daikin Specialist Dealer, Mitsubishi Diamond Dealer, Actron Premium Dealer), the quote will say so.
Zone control — what you actually get
A 4-zone system isn’t just four switches. Modern zone controllers — MyAir, Que, AirTouch — give you:
- Per-zone temperature setting (sleep zones at 22°C, living at 24°C)
- Schedule programming (kids’ rooms cool 8pm–6am, living areas 5pm–10pm)
- Smartphone app control — turn it on from the car on the way home
- Energy reporting by zone, so you can see what each zone actually costs to run
The zone controller is roughly $1,500–$3,000 of the install cost depending on which brand you pick. It pays for itself inside a couple of summers in running-cost reduction.
How the install works
A 4-zone ducted retrofit on a typical 4-bedroom home is a 2–3 day job:
Day 1 — outdoor unit + indoor unit + main trunk ducting. Compressor mounted, indoor unit positioned in the roof void, main supply trunk run.
Day 2 — zone ducting + ceiling diffusers + return air grille. Branch ducting to each zone, ceiling cut-outs and diffuser fitting, the return-air grille (usually centre of the house, big rectangular grille).
Day 3 — electrical, refrigerant, commissioning, controller. Refrigerant lines connected and vacuumed, electrical hard-wired, zone controller commissioned, system performance-tested across heating and cooling modes.
Heritage retrofits (no roof void, plaster ceilings, character cornices) can stretch to 4–5 days because the supply path becomes a custom job — bulkhead supply, floor-mounted return-air, and decorative-cornice-aware diffuser placement.
Where ducted shines in Adelaide
- Burnside and the eastern suburbs — large blocks, premium budget, 14–20kW jobs are common
- Mitcham and the foothills — cold-night heating capacity is the lead value prop
- Stirling, Mount Barker, and the Hills — heat-pump rated capacity at low ambient is the spec to hit
- Northern growth corridors (Mawson Lakes, Golden Grove, Wynn Vale) — modern Colorbond rooflines with deep voids make ducted retrofits clean
The Adelaide Hills location page goes into the cold-climate spec; the Eastern Suburbs page covers the premium ducted angle.
Frequently asked questions
How much does ducted air conditioning cost in Adelaide? A 4-zone, 14kW ducted reverse-cycle system for a standard 4-bedroom Adelaide home costs $9,500–$13,500 supplied and fitted. Larger homes (5–6 zones, 16–18kW) sit $12,500–$16,500. Premium brands and zone controllers add to those numbers.
How long does ducted installation take? A standard 4-zone retrofit is 2–3 days on-site. New-build installs at frame stage are quicker (1–2 days). Heritage retrofits with no roof void can stretch to 4–5 days.
What size ducted system do I need? The Adelaide rule of thumb is 1.0kW per 8m² for a well-insulated home with normal ceiling height. A 200m² home sits at 14kW; 300m² at 18–20kW. Add 20% for the inland heat-load corridor and 10% for poor insulation. The sizing guide article goes into more detail.
Can ducted run in heating only? Reverse-cycle ducted heats as well as it cools, and it’s far more efficient than gas heating in most Adelaide conditions. The reverse-cycle vs evaporative article compares the running-cost arithmetic.
Do I need a separate gas heater with ducted reverse-cycle? No, in most cases. Reverse-cycle ducted handles 0–4°C Adelaide mornings without trouble — provided the unit is rated for low-ambient performance (check rated kW at 2°C, not the 7°C nameplate). Hills properties specifically should spec a cold-climate inverter (Mitsubishi Hyper Heating FH or equivalent).
What’s the warranty on ducted? Manufacturer warranties are 5–7 years on the equipment, and the trusted matched installer add a 5-year workmanship warranty on the install. Both in writing on every quote.
Can you retrofit ducted to a heritage home? Yes — but the install pattern is different. With no roof void, the supply ducting runs in custom bulkheads, the return-air goes floor-mounted, and the ceiling diffusers sit clear of decorative cornices. The quote will tell you straight whether your home is a clean retrofit or a custom one.
Ready for a written, line-itemed ducted air conditioning quote?
Submit the quote form — the trusted Adelaide ducted specialist in touch within one business day. Or call us if you’d rather start with a phone conversation.