Buyer's Frequently Asked Questions

Common Questions

The cooling and heating capacity of an air conditioner is measured in kilowatts (kW).

There are many factors that go in to determining the correct size air conditioning system for your room or home.

By using our air conditioner sizing calculator you can accurately determine the minimum kW required for your room or house.

This simply means that the system is able to both cool and heat. This is achieved by reversing the flow of the refrigerant through the system by way of activating a reversing valve.

A Single Split system air conditioner consists of one indoor unit connected to one outdoor unit and can only effectively heat or cool one room or area.

A Multi Split system can connect multiple indoor units to one outdoor unit and can be used to heat or cool multiple rooms. We supply multi head system, please send though your requirements and we will be happy to help you decide which option best suits you.

Yes, air conditioners are like other appliances that do require regular maintenance. Oz Air Online recommends engaging a professional company annually to maintain your system.

If you need a recommendation for a company in your area we would be happy to help.

Air Conditioning Options

Yes, in both cooling and dry (dehumidifier) mode, the process within the air conditioner helps remove the humidity from the room. This moisture is condensed onto the indoor coil and removed via the drainage pipe to outside.

Depending on the age of your air conditioner it is not always guaranteed that your replacement should be the same kW capacity size. Check out our sizing calculator to confirm.

Due to space limitations we would usually recommend a single split system or a multi head system. Apartments tend to have smaller living spaces and limited outdoor space.

Most apartments or units also don't have a ceiling or underfloor space to install the indoor unit and ducting. Even if it does have a roof space, you would need to check the fire proofing requirements of your ceiling.

Depending on how many rooms you wish to heat or cool, and the size of your house, ducted air conditioners can be a more viable option over multiple split systems. Though if you do not have adequate roof space or underfloor space for the indoor unit and ducting, a ducted would not be an option for your home. 

You will also need to consider you budget.

For help deciding reach out to us, we will be happy to discuss your options.

Air Conditioning Terminology

Most Air conditioning systems these days are inverter type. Inverter air conditioners use a variable frequency drive to control the speed of the compressor motor. When the cooling demand is met the compressor will slow down, in return reducing energy consumption and running costs.

Inverter air conditioners reach the desired room temperature faster and then constantly adjust to maintain perfect comfort. Inverter air conditioners are more economical to operate and quieter to run than fixed speed units.

A 'split system' refers to the fact that there is an indoor and an outdoor component to the air conditioner. These are the most common system you will find in homes and business around Australia.

EER/COP are the units that measure your air conditioner’s efficiency. Energy Efficiency Ratio (EER) is used to measure the AC’s efficiency in cooling.

Whereas the Co-efficient of Performance (COP) is used for heating conditions.

AC units that have a higher EER/COP value are considered to be more energy efficient.

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