When it comes to cooling your home, two main types of air conditioning dominate the choice: evaporative and refrigerated. They work in fundamentally different ways, each with distinct strengths and drawbacks, and the right one depends on your climate, home, and priorities. Understanding the difference helps you choose well.
Here’s a guide to evaporative versus refrigerated air conditioning and how to choose between them.
How Evaporative Cooling Works
Evaporative cooling uses a natural process, drawing warm air through water-moistened pads so that the evaporating water cools the air, which is then circulated through your home. It relies on the cooling effect of evaporation.
Because it draws in and cools fresh outside air, an evaporative system provides constant ventilation, and it typically works with some windows open. This is quite different from how refrigerated cooling operates.
How Refrigerated Cooling Works
Refrigerated air conditioning, including split and ducted systems, uses a refrigeration cycle to cool the air, much like a fridge does. It cools and recirculates the air within a closed-up space rather than drawing in outside air.
This approach cools reliably across a wide range of humidity and outside conditions, and many refrigerated systems can also provide heating. It’s the more consistent option, which comes with its own trade-offs.
Performance in Different Climates
Climate is one of the biggest factors in the choice. Evaporative cooling performs best in hot, dry conditions, where the evaporation process works effectively, which is why it’s popular in dry climates like Perth.
Refrigerated cooling, by contrast, works well across different climate conditions, including humid weather where evaporative cooling struggles. If you experience humidity, or want more consistent performance across changing weather conditions, refrigerated cooling has the edge.
Running Costs
Running costs are a key difference. Evaporative systems generally cost less to run, using less electricity to cool a home, which is a significant advantage over a long, hot summer.
Refrigerated systems typically cost more to run, as the refrigeration cycle uses more electricity. For those focused on keeping energy bills down, and living in a suitable climate, the lower running cost of evaporative cooling is appealing.
Fresh Air Versus Closed-Up Cooling
The two also differ in how they affect your home’s air. Evaporative cooling constantly brings in fresh air and works with windows open, which many people find pleasant and airy.
Refrigerated cooling works best with the home closed up, recirculating the air to cool it efficiently. Whether you prefer fresh, ventilated air or the sealed, consistent cooling of a refrigerated system is a matter of preference as well as practicality.
Heating and Year-Round Use
If you want a single system for year-round comfort, this is worth considering. Many refrigerated systems, particularly reverse-cycle ones, provide heating as well as cooling, covering you in both summer and winter.
Evaporative air conditioning systems are cooling-only, so you’d need a separate heating solution for winter. For those wanting one system to handle both seasons, refrigerated cooling offers that convenience.
Weighing Up the Choice
Choosing between the two comes down to your priorities. Evaporative cooling suits hot, dry climates and those who value lower running costs and fresh air, while refrigerated cooling suits a wider range of climates and those wanting consistent cooling and optional heating.
Your home’s setup, your budget for purchase and running costs, and whether you need heating all play a part. Weighing these factors against your situation points you toward a better fit.
Consider Maintenance for Both
Whichever type you choose, both need some maintenance to keep performing well, and this is worth factoring into your decision. Evaporative systems have pads and a water system that benefit from regular attention, particularly before summer.
Refrigerated systems need servicing too, including keeping filters and components clean so they run efficiently. Neglecting either type leads to poorer performance and higher running costs over time.
Neither is a fit-and-forget option, so it’s worth being prepared for some upkeep. A little regular maintenance keeps whichever system you choose running efficiently and reliably for years.
Making Your Decision
Neither evaporative nor refrigerated air conditioning is simply better, as each excels in different situations. The right choice depends on your climate, your priorities around cost and air, and whether you want heating too.
With the right choice, you’ll stay comfortable through the seasons in a way that suits your home and budget.
