Ceiling fan vs air conditioning running costs is a fair question in a Brisbane summer, because the two appliances sit at opposite ends of the electricity scale. A ceiling fan draws about as much power as a light bulb. An air conditioner is one of the biggest energy users in the house. The practical answer for most Brisbane homes is not one or the other, it is using both well.
Why the running costs are so different
A ceiling fan does not cool the air at all. It moves air across your skin, which helps sweat evaporate and makes the room feel several degrees cooler than it is. Moving air takes very little energy, which is why you can run a fan all day without noticing it on your bill.
An air conditioner actually removes heat from the room and pumps it outside. That takes real work, and the compressor doing it draws far more power than any fan. The hotter the day and the larger the space, the harder it works. You can compare typical appliance energy use on the Australian Government’s energy.gov.au resources.
Using them together is the cheap trick
Air movement from a fan lets most people set the air conditioner a couple of degrees warmer while feeling just as comfortable, and every degree you raise the cooling setpoint cuts the air conditioner’s workload. In practice that means running the air con at 24 or 25 with ceiling fans on, instead of 21 or 22 with still air. The fans cost next to nothing to run, and the air conditioner cycles less.
When a fan alone is enough
Bedrooms overnight, covered outdoor areas, and mild days at the start and end of summer are all fan territory. If a room only ever needed the edge taken off it, a ceiling fan installation is a far smaller job than adding an air conditioner and costs very little to operate for the life of the fan.
When air conditioning earns its keep
Brisbane humidity is the deciding factor. Fans do nothing about moisture in the air, and on a 90 per cent humidity February day, moving damp air around only goes so far. Air conditioning dehumidifies as it cools, which is why it feels so much better on the worst days. For living areas you use all summer, a properly sized split system run at a sensible setpoint, with fans assisting, is the comfortable and economical combination.
Both need the right electrical work
Ceiling fans replace existing light fittings in some cases and need new wiring in others. Air conditioners need a dedicated circuit and, for larger systems, enough switchboard capacity. Crusader Electrical & Air installs both across Brisbane, tested and certified (Electrical Contractor Licence 91149, ARC Licence L187932). Call 07 3060 9105 if you are weighing up which way to go, and we will give you a straight answer for your actual rooms.
