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’re ARC-licensed ducted specialists, and we’ll get back to you within 24–48 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; we’re Actron-authorised installers.
Where we hold 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 we 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 — we’ll be in touch within 24–48 hours. Or call us if you’d rather start with a phone conversation.