Cooling your home to air conditioning

Installing the Right AC Unit Makes All the Difference

A lot of people probably assume that most air-conditioning units are the same. They are wrong. The truth is two main factors determine if an air-conditioning unit will be effective and efficient ‒ if it works right.

The first factor is the size of your home. Obviously, you’ll want to have an air-conditioning unit that is powerful enough to cool all the interior square footage of your home.

However, you don’t need such a large cooling capacity if you have a smaller home.


You must also factor in the number of rooms in your home and the size of these rooms.

Based on these factors, you can make an informed decision about the correct air-conditioning unit for your home.

Sounds pretty complicated, but it’s worth it to figure out what size AC unit you need and get the right one. You’ll be glad you take the extra step for the following reasons:

Save Money

One big reason that size matters is because of cost efficiency.

For example, if you own a four-bedroom house with two living areas, you should not purchase an air-conditioning unit that is 6 kilowatts.

You would need a stronger one of about 20 kilowatts. Otherwise, a smaller unit will need to work harder, take longer, and consume more electricity just to cool the room at the temperature you have set.

On the flip side, you don’t want to purchase a 20-kilowatt AC unit if you only have a small one- or two-bedroom house.

Not only will the unit itself cost you thousands of dollars more to purchase, but you will use more electricity than needed to cool your home.


Therefore, installing the correct AC unit in your home will save you money on your electricity bill and the purchase cost of the unit itself.

Reduce Your Carbon Footprint

An easy way to choose an energy efficient AC unit is to observe the SEER rating. This is the Seasonal Energy Efficiency Ratio, which gives consumers an idea of how much energy a unit needs to run. If the SEER is more than 16, then the unit uses less energy. If it is 13 or smaller, it uses too much energy. So, look for a unit with a SEER of 16 or more.

With the rising use of air conditioners in Australia and around the world, the electrical demands to run these units are increasing. This alone is a reason to make sure that you are not purchasing an air conditioner that consumes more electricity than you need.

Another thing you need to concern yourself with are the refrigerants in your unit. Most air conditioners use refrigerants with hydrochlorofluorocarbons in them, also known as Freon or R-22.

These carbons are damaging the ozone layer and increasing the speed of global warming.


Fortunately, AC manufacturers are now creating units which use ozone-friendly refrigerants. Look for units that use refrigerants such as R-410A or R-407C.

Reduce Moisture

The right size AC unit will not only cool the air in your home, but it also will remove the moisture from it.


The term “latent load” is used to describe the moisture in the air. Air-conditioning units use “tons” to measure their rate of cooling. If a unit can freeze 2,000 pounds of ice in 24 hours, then its cooling rate is 12,000 British Thermal Units Per Hour (Btu/h).

You don’t necessarily need too much tonnage to remove the moisture from your air. In fact, it is recommended that you have just slightly less tonnage than is needed to remove the moisture.

Ask a contractor or your home’s builder what the proper tonnage should be for your air conditioner, especially if you live in a humid climate.