5th Star Airconditioning

Frequently Asked Questions


What size air conditioner should I purchase?

You have to do a bit of homework to answer this one accurately. You need to consider how many rooms you are going to cool, where they are situated, what is their square meterage (m2), how much sunlight will they receive, do you have insulation in the ceiling and in the walls? We would suggest you click on our online calculator to investigate further. Alternatively, for a professional installer to come and provide you with a detailed Heatload Calculation, just call us on 1300 203 665.

As a quick guide, you want both the Air Conditioners Output Capacity and its Energy Consumption (both are shown on the EER label as Capacity Output KW and Power Input KW) to meet what your trying to achieve in your home. Don’t be afraid to ask a reputable manufacturer, distributor or indeed 5th Star a lot of questions as to what will best meet your needs.

What is an inverter system?

An inverter system enables an air conditioner to vary its motor speeds in response to cooling demand. An inverter system is normally more energy efficient (at part load operation), more economical to run and uses significantly less power.

What is the difference between a “split system” and a “through the wall” unit?

A split system has 2 separate operating components. One part of the unit is positioned outside of the home and the other is mounted internally. They are connected and when installed correctly, often provide quiet, efficient air conditioning. A through the wall unit is simply one complete system. They have to be installed through a window or a wall. These are an old school design and tend to be bulky, noisy, unattractive and only suited to small spaces.

What is the difference between a “split system” and a “multi split system”?

A split system has 2 separate operating components. One part of the unit is positioned outside of the home and the other is mounted internally. They are connected and when installed correctly, often provide quiet, efficient air conditioning. The multi split system also has one external operating component but is connected to multiple indoor parts installed in a number of rooms/living spaces (up to 9). The multi split system has the capability of efficiently cooling a greater proportion of your home.

Is a cooling-only system better than a heating/cooling system?

No, not necessarily, it really depends upon your personal needs. Cooling-only systems tend to be cheaper than their Cooling/Heating counterparts. However having a combination system could potentially save you money through not having to purchase heaters etc in the colder months.

Can I leave doors and windows open while operating the unit?

There’s nothing stopping you from doing so, but you should be aware that the cooling process will be inefficient and your air conditioner will be working a lot harder than it has to. So if you keep everything open you will have a reduced cooling effect and be burning holes in your pockets with the extra money you fork out for the power bill.

Can an air conditioner be turned upside down or sideways?

No, an air conditioner should remain in the upright position at all times. Failing to adhere to this will result in damage to your unit. The system contains oil and cooling fluids that when disturbed can be dispersed into areas not conducive to healthy operation. If your air conditioner has been placed on its side or upside down for any reason, you should right it and wait 24 hours before operation.

How often should I change the filters in my air conditioners?

Its always best practice to read through the manufacturers requirements. However, as a general rule of thumb, you should remove and inspect the filters twice a month. If required you should give them a light blow or vacuum to clean. Some systems contain disposable filters. If so, remove & replace in accordance with the manufacturers maintenance instructions. A blocked or dirty filter can significantly reduce airflow through the system. This has a twofold flow on effect – it limits the air conditioners cooling ability and it can cause an “icing up” on the cooling fins.

Should a thermostat be switched to “auto” or “on”?

Always verify this type of information in the manufacturer’s instruction manual first. Generally speaking switching to the “auto” function ensures the fan will only operate or “kick in” when the room temperature requires it. Logically this results in a more efficient system as it is drawing the extra power for the fan only when it needs it.

Can I reduce energy usage while still using the unit?

Yes – if you are mindful of closing doors, windows, curtains and blinds etc, it will help the air conditioner cool the room at a faster rate. An inverter system, by its very nature tends to be more economical. It achieves this through varying its motor speed to suit the system demand rather than being on an endless cycle of “kicking in” reaching the required temperature and then “kicking out”.

Should outdoor units be covered from the rain?

No, the outdoor unit in a Split System is designed to operate in the elements and inclement weather conditions. Outdoor units require free flowing air at all times.Covering the unit could actually result into product failure and void your warranty.

If an outdoor unit needs replacing, should the indoor unit be replaced too?

Yes, it is a good rule of thumb to replace the entire system when a major component of the system fails (and cannot be repaired). Modern day air conditioners are designed to operate with matched system components.

Can I plant flora around an outdoor unit?

Yes but ensure the unit has free airflow available at all times. The system requires constant access to airflow for cooling purposes. Failure to provide such, can result in damage to your system and voiding of your warranty. Also be wary of any branches, twigs or leaves that could be inadvertently sucked into the unit. These again could damage the internal components and void your warranty.

What is the average life expectancy for heating/cooling units?

An average life expectancy for a good quality modern air conditioning split system is about 10 years.

When and how do I pay for the air conditioner and installation?

This can be done in 2 ways. You can pay for it via credit or debit card over the phone or over the internet. All of our business transactions take place under the auspices of the latest consumer protection systems and secure gateways.

How long does it take to obtain an online quotation ?

The online quoting system will take no more than 5-10 minutes to complete. You have all the details and pricing clearly presented in front of you and it really is a matter of you choosing the Installation Scenario that best suits your needs, performing a few basic calculations and then adding them up.

After obtaining an online quotation how long does it take to get verifcation of that price?

That depends totally on you. If you’re happy with the results of the online quote you simply need to phone or email us. We will book an appointment time suitable to you, and meet you at your property. Our expert installer will double check all the details and information provided. If all the details are correct, there you have it – a quotation ready to go. If there are any differences, our installer will discuss them with you and provide a revised costing.

After receiving the quotation, how do I book in the installation?

You can either call us or email us to book in an installation. In most cases, our clients receive the phone quotation and immediately book in whilst still on the phone. Again, its totally up to you, if you would like to sit on it for a bit, that’s quite OK. Call or email us when your ready to go.

What if I don’t want to use the online quotation system, can I speak with someone?

Absolutely, we pride ourselves on our customer service and actually caring about the treatment of our clients. Someone will always answer your call in business hours and we are there to answer any of your questions.

How long does an actual installation take?

Each installation is a little different but as a rule of thumb, most jobs are completed within 6-8 hours.