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This article is written for home owners
looking to purchase a new air conditioning system for their home. I wanted to
provide a general air conditioning guide on what to ask yourself and also what to look for.
There are literally hundreds of different products on the market but I wanted
to cover the main points that will see you end up with the right system for
your needs. To keep the article short and easy to read I couldn’t cover every
single angle, please4 make sure you do your homework and consult an air
conditioning specialist for further detail.
First off, there are 4 main types of air
Split systems, there is both
ducted and room systems (most common)
Window wall units
Portable air conditioners
Evaporative coolers
Obviously you need to decide what type of
system you will first get. This could be impacted by the type of home it is
going into and what stage the home is at. If you haven’t started building yet
then you have a lot more choice. If the home is already built then different
systems will have different costs as opposed to pre build.
Split systems are the most common and
without going into full detail, there is many different types. In general, they
are designed to heat or cool one room. A ducted system is designed to heat or
cool a whole house. A wall split system will also require an outdoor unit to
operate so keep this in mind when choosing a desired location. These are the
most cost effective and efficient units.

Ducted reverse cycle air conditioners are
the second most common types and are designed to heat or cool the whole home.
They are also the most expensive to buy and run so you need to make sure it is
designed to suit your home and lifestyle. They are mostly favoured because they
only require one outdoor unit for the whole home and it is situated in the
roof. They can be zoned to minimise running cost.
Window wall units operate the same as a
split system unit. They use refrigerant to transfer temperature. These units
are generally older and not really used anymore unless an existing unit has
been removed and the owner doesn’t want to brick up the hole left in the wall.
They are not very efficient to run and they are noisy because the compressor is
installed in the wall with the unit. They are cheaper to buy.
Portable air conditioners are more of a
temporary option and on the surface, are a lot cheaper to buy than a wall split
system. There is also no installation costs. The reason I say “on the surface”
is because when you take into consideration the amount or warm or cool air they
put out, they are actually quite expensive to run with minimal effect and
therefore very inefficient. They are really only good for a quick and temporary

Evaporative coolers are not really “true”
air conditioners because they don’t really refrigerate the air using the same
heat transfer method. They simply draw in hot air from outside through a unit
on top of the roof, pass it through water soaked pads and then expel the cooler
air into the house through ducts. Because the air is not
recycled like a traditional air conditioner it needs to be expelled through
open windows and doors. These units create more of a cool breeze and can be
likened to a nice ocean breeze. These units also don’t work particularly well in
humid climates because the air already has a lot of moisture in it.

In summary, the most efficient and cost
effective unit is the split system. It will cool a lot more and create a more
comfortable environment. You will need to base your unit requirement on the
size of the area you are heating or cooling. The size of the air conditioning
unit is measured in kilowatts so be sure to let the professional supplier know
the size of the area you have and purchase the proper size unit to accommodate
this. A unit that is too small will be very costly and inefficient to run and
defeat the purpose of using this type of unit. Make sure you shop around and
always use a professional for installation. For further information about air conditioning you can visit air and water