Evaporative air conditioners are becoming increasingly popular amongst Perth homeowners. And it’s not surprising. Evaporative coolers are cheaper to install. They’re more environmentally friendly. Plus, they feature significantly lower running costs.
For this week’s blog, we’re going to take a quick look at these units; how they work, their benefits, as well as some potential draw-backs.
How Does Evaporative Air Conditioners Work?
Evaporative air conditioners work by drawing hot, external air through a number of ‘filter pads’. As the hot air is drawn over these filter pads, water evaporates, thereby cooling and humidifying it. The now cool and moist air can then be delivered to your home.
That cool air enters your house via a series of vents, cooling your indoor space and removing stagnant hot air. It then exits through open doors or windows, making room for another fresh cycle.
Benefits of Evaporative Air Conditioning
The most significant benefit of evaporative cooling is its low installation and running costs. Meaning a lower price for initial set-up and lower energy bills in future.
They are also a great choice for those considering their carbon footprint. As they create much fewer CO2 emissions and produce no chlorofluorocarbon (CFC) gases.
And because they work best in dry, hot environments, they’re ideal for Perth conditions.
Evaporative Cooling Running Costs
Evaporative cooling systems use a combination of water and electricity.
Below is an estimation of costs, based on the amount of electricity each system uses. Actual costs will depend on the cooling capacity of your unit, as well as your energy company’s pricing structure.
Portable units: 2 – 3 cents per hour
Window/wall-mounted units: 6 – 7 cents per hour
Ducted units (medium size): 12 – 28 cents per hour
How Much Water Does Evaporative Cooling Use?
How much water your system uses will largely depend on the type of system you choose. However the air’s humidity and fan speed selected will also affect water consumption.
A smaller portable unit can use up to 4 litres of water per an hour. While a larger central system can use as much as 25 litres of water per an hour.
Ducted evaporative air conditioners refresh their water supply regularly, so can have higher water consumption rates. Speak to your local air conditioner installer for details.
What to Consider When Choosing Evaporative Cooling
One possible draw-back of evaporative cooling is that evaporative coolers work best with windows and doors left open. This is so the cool air cool air can flow in and out of your home, making space for a regular influx of fresh, cool air.
Another thing to consider is that evaporative coolers will not be as effective if the outside air is humid. This is because in humid conditions the water does not evaporate as easily from the pads. As a rough guide, remember, the dryer the climate, the better your system will work.
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