Air Conditioning

What the stars on an air conditioner label actually compare, why there are three climate zones, and how to turn the kilowatt hour figure into a real running cost.

How ducted aircon zoning actually works, the components involved, and an honest look at whether it saves you money on running costs.

A clean aircon filter genuinely helps with dust and humidity-driven allergens, but a neglected one can make indoor air worse. Here's the routine that actually matters.

Where the outdoor condenser goes affects efficiency, noise and your neighbours. Here's how to get the siting right before it's bolted to the wall.

Rattling, buzzing, hissing or grinding from your aircon? Here's what each noise usually means, what you can safely check yourself, and when it's a licensed tech's job.

Evaporative cooling wins in dry heat and struggles in humidity. Here is how each whole-home system works, what drives the running cost, and how to pick.

A fixed split or ducted system is wired back to your switchboard, not plugged into a power point. Here is what happens on the electrical side of an install: dedicated circuits, isolators, switchboard capacity and who is legally allowed to do the work.

You almost never need a new thermostat to get app control on the aircon you already own. Here is what actually works on an Australian split system, what it saves, and where DIY stops.

Shade the glass, move air across your skin, and time your ventilation. What actually cools a room without an air conditioner, and where the limits are.

Reverse cycle is usually the cheapest of the three to run, and the reason is physics. Here is how heat pumps, gas and electric heaters compare on running cost, comfort and who is licensed to install them.