Evaporative Cooling Adelaide
Evaporative cooling is the SA-specific cooling option — works beautifully on Adelaide’s dry inland summer days, underperforms on the humid coast. A roof-mounted ducted evaporative system for a typical 4-bedroom home costs $4,500–$7,500 supplied and fitted, runs at roughly 25% of the electricity cost of refrigerated cooling, and pulls in fresh outside air rather than recirculating stale conditioned air. For Salisbury, Modbury, Mawson Lakes and the inland north it’s still a competitive choice in 2026; for Glenelg, Henley Beach and the humid coast, refrigerated reverse-cycle wins.
We’re ARC-licensed evaporative installers, and we’ll get back to you within 24–48 hours. The form takes 90 seconds, and the quote will spell out which capacity fits the home, which brand we’re authorised to fit, and the all-in fitted price.
How evaporative cooling works
A ducted evaporative cooler sits on the roof. A pump wets a series of cooling pads inside the unit, a large fan draws hot dry outside air through the wet pads, the air gives up heat to evaporate the water, and the cooled air is ducted into the rooms below.
Three things follow from that:
- It only works on dry days. Humid air can’t absorb much more water vapour, so the cooling effect collapses on muggy afternoons. Adelaide’s dry summer climate is its sweet spot — Glenelg’s salt-humid sea-breeze is its enemy.
- You leave the windows and doors open. The system pushes air in; it has to push out somewhere. This is a feature in summer (constant fresh air, no stuffiness) but a fundamental difference from refrigerated cooling.
- The running cost is low. Just the fan motor and the pump — no compressor. A typical evap system runs at $0.10–$0.20 per hour against $0.50–$1.20 per hour for refrigerated cooling of equivalent output.
When evap is the right call in Adelaide
| Suburb / region | Evap fit |
|---|---|
| Salisbury, Elizabeth, Modbury | Strong fit — dry inland heat, no humidity penalty |
| Mawson Lakes, Para Hills, Pooraka | Strong fit |
| Northern growth corridor (Golden Grove, Wynn Vale) | Good fit |
| Inner CBD, North Adelaide | Mixed — works but refrigerated is more flexible |
| Eastern suburbs (Burnside, Norwood) | Mixed — premium budget tends to choose ducted reverse-cycle |
| Mitcham, Unley, Marion | Mixed — coastal-adjacent but inland enough |
| Glenelg, Henley Beach, Brighton, West Lakes | Poor fit — coastal humidity reduces performance |
| Adelaide Hills (Stirling, Mt Barker) | Marginal — cool nights mean less cooling demand to begin with, and the heating story belongs to reverse-cycle |
The northern suburbs page goes into the heat-load + dry-air angle that makes evap a strong Salisbury/Modbury fit. The western suburbs page covers the coastal-humidity reason it’s a poor fit on the western strip.
Indicative evap pricing in Adelaide
| Home size | Capacity | Fitted price |
|---|---|---|
| Small 2–3 bed | 7,000m³/h | $3,500–$5,000 |
| Standard 4-bed | 9,000m³/h | $4,500–$6,500 |
| Large 4-bed / 2-storey | 11,000m³/h | $5,500–$7,500 |
| Very large 5–6 bed | 13,000m³/h+ | $6,500–$9,500 |
Evap unit capacity is rated in cubic metres per hour (m³/h) — the volume of air the fan moves, not the kW of cooling. A 9,000m³/h unit suits a typical 200m² home. Add capacity for two-storey or open-plan layouts.
Brands we install
The Australian evaporative market is concentrated in three brands:
- Bonaire — the SA-market leader. Bonaire Pinnacle and Integra ranges. The standard pick for Salisbury and the northern plains.
- Braemar — Australian-made, strong reputation, full ducted range.
- Brivis — solid mid-range option, ducted and free-standing models.
- Coolair — entry-level fit-out, competitive on price.
We carry 2–3 of these. The quote will tell you which brand we’re authorised to fit.
Evap vs refrigerated — running cost arithmetic
The temptation is to compare evap and refrigerated on the cooling effect they produce. The right comparison is on the cost to keep the home at a given comfort temperature for a season.
For a typical 4-bedroom Adelaide home running cooling 4 hours/day across the November–March season (~120 days):
| System | Hourly running cost | Seasonal cost (480 hrs) |
|---|---|---|
| Ducted evaporative (9,000m³/h) | $0.15 | ~$72 |
| Ducted refrigerated (14kW, COP 3.5) | $0.85 | ~$408 |
| 7kW reverse-cycle split (one room) | $0.30 | ~$144 |
The evap saving is real on the running cost. Where evap loses is on humid days, on cold-morning heating (it can’t heat — you need a separate heater), and in homes where you can’t open windows for the airflow.
The reverse-cycle vs evaporative article goes deeper into the climate-specific comparison.
What the install needs
- Roof access and structural capacity — the unit weighs 80–120kg installed and full of water. Most Adelaide homes handle it without reinforcement; some 1920s timber-truss homes need a trim joist added.
- Mains water supply to the roof — a 1/2” water line to the unit
- Drain outlet — for the bleed-off water (mineral build-up control)
- A return-air path — usually leaving doors and windows ajar, or a dedicated relief vent
- Electrical supply — single 10A circuit
A typical install is a one-day job. Replacement of an existing evap (same roof penetration, same ducting) is usually a half-day.
Frequently asked questions
How much does evaporative cooling cost in Adelaide? A ducted evaporative system for a standard 4-bedroom home costs $4,500–$6,500 supplied and fitted. Larger homes (11,000m³/h+) sit $5,500–$7,500. Replacement of an existing system using the same ducting is typically $3,500–$4,500.
Is evap cheaper to run than refrigerated? Yes — substantially. Evap runs at 15–25% of the electricity cost of refrigerated cooling for equivalent comfort effect. The catch is that evap can’t dehumidify and can’t heat, so you give up flexibility for the running-cost saving.
Does evap work in Glenelg or Henley Beach? Not well. Coastal humidity (60–75% on most summer days) collapses evap’s cooling effect. For coastal suburbs, refrigerated reverse-cycle is the right call. The Glenelg location page and Henley Beach location page cover the reasons in detail.
Does evap work in Salisbury or Modbury? Yes — exceptionally well. The northern plains run hot, dry summer afternoons (low humidity, high temperature) which is exactly evap’s ideal operating envelope. The Salisbury location page covers the inland heat-load angle.
Can evap heat the house in winter? No. Evap is cooling-only. If you want one system that heats and cools, you’re looking at reverse-cycle air conditioning — split, multi-head or ducted.
How long does evap last? A well-maintained Bonaire or Braemar unit lasts 15–20 years. The cooling pads need replacement every 3–5 years (~$150–$250 per pad set, fitted). The annual service — pad clean, pump check, water-quality check — is $180–$280.
Can I install evap on a heritage home? Often yes — but the visible roof footprint of a 9,000m³/h unit is significant. Heritage overlays in parts of Norwood, Walkerville and North Adelaide restrict visible-from-street installation. We flag this in the quote and work the unit to a less-visible roof position where possible.
Ready for a written, line-itemed evaporative cooling 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.