When it comes to cooling your home in the harsh Australian heat there are a lot of options to consider from portable units that can handle just one room to central units that deal with the whole house at once. Evaporative coolers are an option that's best suited for hot dry climates as they rely on relative humidity for their effectiveness.How Evaporative Cooling Works
Any time you run hot dry air through a moist pad, you end up transferring heat from the air to the pad and moisture from the pad to the air. This gives you cooler, moist air, and is one of the oldest and simplest forms of air conditioner. Because evaporative cooling works by adding moisture, it's more effective in dry climates than damp ones.Evaporative Cooling Units
Before installing an evaporator air conditioner, you should consider a few factors. Since it works by moving air, the fan is very important. Centrifugal fans are quieter, but can use more power. Axial fans are louder, but can be more power-efficient. Also consider your choice of evaporative pads; cellulose pads are generally more expensive but last longer; wood wool is easier to clean.Mobile Units
The advantage of mobile evaporator air conditioners is that you can move them from place to place as you need them. You don't have to leave your cooler behind when moving houses. Many come with a remote control, so you don't have to get up to change the setting. It's a nice feature to have.Maintenance and Features
Like all mechanical devices, an evaporative air conditioner requires maintenance. You have to add water to make sure the pads are moist; you also have to clean and replace the pads. Some may require lubrication. Try to pick a cooler with easily accessible pads, and a wide range of fan speeds. The more speeds you have, the greater control you have over cooling.