What is an aircons  and how does it work?

An aircon is a system that removes heat and moisture from an area through a refrigeration cycle, and replaces this with colder air and vice versa. At Sucasa Air Conditioning, we focus on selling a variety of different types and designs of aircons in order to meet our clients specific requirements at affordable pricing. This guide will give you all you need to know about aircons, in just six minutes reading time.

Inverter vs non-inverter aircons



There are two kinds of models of aircons. The traditional type, which is a fixed speed non-inverter aircon and the newer technology which are inverter variable speed aircons. The key difference between the two is that an inverter aircon has a variable speed motor which allows the unit to regulate the speed of its compressor motor thereby consuming less power, whereas the non-inverter aircon motor only runs at a fixed speed where once the desired temperature is reached the unit motor stops.

Thereafter, once the temperature changes it starts up again thus using more power. Inverter aircons also have an added benefit of being quieter than a non-inverter aircons, with a lower db noise level which suits certain clients requirements in residential and commercial settings. This is also applicable to many of our clients within residential estates that need to comply with a number of body corporate regulations regarding aircons.

Categories and types of aircons

There are many different types of aircons which can be split into 3 categories. The first type of aircon is residential aircons which are mainly used by clients for their homes as well as small offices or workplaces. These are categorized as midwall split aircons as these have an indoor unit and an outdoor unit which are connected with piping.

Residential aircons come in 5 different sizes which is 9000btu, 12000btu, 18000btu, 24000btu and 34000btu. Each size covers a certain square meterage which may be used as a guide for clients to have the correct size for the space required to be cooled or heated.

Portable Aircons


Another type of residential aircon is the portable unit. These are used by clients who require no installation and would like to move the aircon unit easily. These only come in one standard size of 12000btu and can therefore only work in areas which are 25sqm or less. Unfortunately all portable aircons only come in non-inverter options and are much louder than midwall split aircons.

Commercial Aircons (Underceiling, Ducted and Cassette Aircons)


The second type is commercial aircons. These are used for bigger spaces such as large offices, warehouses, commercial buildings etc. These aircons come in many different sizes as well, and are priced much higher than residential areas depending on the size of unit required. Commercial aircons can also be further split into categories which are Ceiling Cassette Units, Under-ceiling units and Ducted or Hideaway Units.

Industrial Aircons


The third type is Industrial aircons, which are usually a centralised cooling system that includes a ducting system that allows cool air to be circulated. These are used at industry levels for large spaces. These also include water chiller systems, VRV systems and evaporative cooling systems. These types of aircons can be prohibitively expensive for residential settings and are very often utilised in bigger corporations or industrial settings.

Types of aircons

Midwall Split System –these types of aircons are used mainly in residential settings and small offices under 60sqm. The midwall split system has this name as there is an indoor unit and an outdoor unit which is joined together by piping and power cable.

Ducted or centralised system – These are bigger systems that are used more in commercial and industrial settings. These work by transferring cool/warm air through a centralised unit, usually in your ceiling through a number of ducts to different rooms. The air circulation is also zoned which allows you to control the air and temperature.

VRV/ VRF system – This system acts as a multi split system and works where a single centralized outdoor unit supplies air to multiple indoor units. This is a non traditional form of HVAC.

Portable aircon – These types of aircons are not fixed and may be moved around room to room as required. How this aircon works is by pulling air from inside a unit with the motor inside the aircon, cooling the air in the space. There is a hose attached to the portable which needs to be placed through a window to exhaust the excess warm air outside through the hose.

Recently, most of the types of aircons above have been integrated with newer technology that allows for smart control and smart measuring. This technology allows for the aircon to be controlled from anywhere utilising wifi and also allows you to analyse electrical consumption and set reservation settings for turning the unit off and turning it on automatically.

Window Wall Aircons

A Window wall aircon system is a system that was previously utilised in containers whereby it was a single integrated unit that would be fitted through the window. It works similar to a split, however half the unit is inside whereas the other half would be outside. These units are now uncommon as they are not aesthetically pleasing.

Warranties for different brands of aircons

Each distributor maintains a different warranty period for the aircon units they supply. At Sucasa Air, we hold a minimum 1 year comprehensive and 5 year compressor warranty subject to annual maintenance on our brands of aircon units. This allows the client to have a quality minimum life cycle of the unit, and if maintained properly the aircon unit may last up to 15 years.

There are also higher warranties offered on our higher end brands such as Samsung and LG where certain models offered have a 2 year comprehensive warranty and 10 year compressor warranty subject to annual maintenance. Thus the price holds value for the client as they are in warranty for 10 years on the most expensive part of the aircon, and these aircons may last up to 20 years if maintained well.

Some brands such as Samsung allow for an extended comprehensive warranty which assists the client in having peace of mind for a prolonged period of time. These comprehensive warranties for these aircons can be extended to 5 years based on bi-annual servicing. As these units are frequently serviced, there is very minimal room for the unit to not perform optimally and these aircons have a much longer lifecycle than those which are not serviced at these intervals.

Brands of aircons

At SucasaAir, we keep different brands of aircons ranging from higher end to more affordable quality brands. There are higher end brands such as Samsung, LG and Midea which are recognised worldwide and are trusted by most clients. We also keep the more affordable brands such as Alliance and Jet-Air, which are not as renowned worldwide but are more affordable and are still good quality aircons with good warranties.

What size aircon do you require?

The size of aircon you choose is extremely important to ensure warranties are upheld, as well as for the aircon to work optimally in the desired space. Installing a smaller air conditioning unit which is not suitable for a big room, will severely affect the lifecycle of the unit and may not provide the desired result. In cases where clients insist on an under-sized unit, limited to no warranties are held on these.

There are a number of factors to consider when choosing the size of aircon required.

A significant factor is the heat-load that is present in the room or space. If the room is north facing (this may add to the heat-load), if the room has many windows exposed to direct sun light and as whether the room is double or single volume as this adds to the square meterage of the room, all of these factors must be taken into consideration to calculate accurate square meterage and heat-load in order to correctly size the required system.

Other factors which may need to be considered for office blocks or larger areas is the number of machinery/equipment and the amount of people who are in the room on average, as this affects the space, heat-load and circulation. Once these factors are considered, it is much easier to choose the correct size aircon.

The current sizing estimate calculator which can be used to determine optimal size is as follows :

9000BTU – Covers +-18 square metres
12000BTU – Covers +-24 square metres
18000BTU – Covers +-36 square metres
24000BTU – Covers +-48 square metres
34000BTU – Covers +-68 square metres

As it may sometimes be quite difficult for a normal end user to calculate sizing of certain rooms, or in the scenario that the room is open planned, Sucasa Air offers site visits to allow for accurate measuring and quoting on specific systems. This allows for customers to get quotes on exactly what they need, and fast-track the process to getting their space heated or cooled with a suitable aircon.

Advantages of an aircon


The main use of an aircon is to regulate the temperature and remain comfortable with ease during the hot summer and cold winter months. The following points are some advantages and disadvantages of an aircon:

– Decreasing heat load on machinery and equipment in commercial settings

– Prevents health problems in elderly and vulnerable people due to heat related issues.

– Aircons cool and heat which is a double function and allows clients to utilise units all year round or as per their preference.

– Some higher spec models contain virus doctors, ionisers and anti bacterial filters which keeps the air clean while circulating the air in the room

– In office environments, the aircon enhances job performance as employees work in a comfortable environment

– The aircon repels insects in homes with good air circulation without need for windows to be open

– Modern technology allows for the aircon to function at a quieter level

– Inverter models which are now quite popular allow for much higher energy savings compared to traditional methods of cooling/heating which use up a lot of energy

– The regulation of temperature allows for clients to have better quality of sleep

– Devices will be protected from overheating

Disadvantages of an aircon

– These are priced high compared to fans and other traditional methods of heating and cooling

– If not maintained properly, dust or bacteria can accumulate and cause respiratory issues or allergies to flare

– Spending an increased amount of time with the aircon on can cause dryness as moisture from the air is removed

– Older models such as the non inverter units use a lot of electricity when on for long periods of time

– Units must be maintained annually to ensure it is running optimally which adds to costs

– The aircon units do cause a certain level of noise which can be distracting for people who are sensitive to noise

– Installation of the aircon can cause damages to walls and or building due to drilling and nature of the installation