Phrases like System 1, System 2, or System 4 might be new to you if you live in Singapore or Malaysia. If you have a larger flat or a house with several rooms, then a System 4 aircon could be the best fit. But what is a System 4 aircon? And does it meet your home requirements? Let’s find the answers.
What Does System 4 Aircon Mean?
A System 4 aircon is a multi split air conditioning system where one outdoor condenser is attached to four indoor units. Each of the indoor units is generally located in a different room and can be controlled separately. Thus, you can cool down four individual portions of a building without the need for having four separate outdoor units.
For quick understanding:
- System 1 = 1 outdoor + 1 indoor
- System 2 = 1 outdoor + 2 indoors
- System 3 = 1 outdoor + 3 indoors
- System 4 = 1 outdoor + 4 indoors
These aircons are most commonly found in larger-sized HDB apartments and houses with four air-conditioned rooms.
How System 4 Aircon Works
In a System 4 setup, an outdoor condenser unit is placed outside the house. This outdoor unit is connected via refrigerant piping to four separate indoor units located in different rooms. The indoor units can also be wall-mounted, ceiling-mounted, or concealed in ducts depending on the style of the room.
These indoor units of the system 4 aircons have individual controls which allow you to switch on only the rooms that are occupied. This helps save energy in a considerable amount. The system also employs inverter technology which utilizes electricity based on the cooling requirements of the space. In other words, they provide cooling only when necessary. It ensures better energy efficiency and lower noise levels.
Advantages of System 4 Aircon
Below are a few benefits of having a system 4 aircon that you may consider:
Efficient Use of Outdoor Area
Only one outdoor condenser unit is needed for 4 rooms. This is beneficial for properties with limited outdoor space.
Independent Temperature Control
Every indoor unit can be individually controlled and adjusted. This ensures precise comfort in each area.
Energy Saving with Inverter Technology
Modern System 4 aircons utilize inverter compressors which adjust the energy consumption based on the cooling requirements.
Improved Home Aesthetics
Less visible outdoor units provide a clean and uncluttered outside of the house.
Quieter Indoor Experience
As most parts are installed outside, the indoor environment is affected less. Therefore, the bedrooms and study rooms remain quieter.
Factors to Consider Before Installation
Below are the factors to consider before installing a system 4 aircon:
Adequate Cooling Capacity
Confirm that the outdoor unit’s BTU capacity is sufficient for all four indoor units, especially during simultaneous operation of all four indoor units.
Installation Cost
System 4 aircons are, to some degree, more sophisticated than single split systems. The initial installation cost may be higher due to increased piping and electrical work.
Maintenance Requirements
Despite having a single outdoor unit, servicing each of the four indoor units is mandatory. Consult a multi-split system maintenance specialist for regular maintenance work.
Compatible House Design
The gaps between the different rooms and the outdoor unit influence the cost and time required for installation. Make sure the piping installation and hiding work comply with HDB guidelines. Also, make sure aircon installation work does not hamper the interior or exterior design aesthetics.
Is System 4 Aircon Suitable for You?
You will find a System 4 aircon suitable if you have:
- Four rooms requiring cooling.
- A spacious HDB flat, condo, or landed house.
- The need to individually control the temperature in every room.
- Little outdoor space for multiple condenser units.
If you fit this description, a System 4 is likely your best choice.
Popular Brands For System 4 Aircons In Singapore
Below are the most popular brands that you may consider in Singapore:
Mitsubishi Electric
Famous for their dependability, inverter technology, and intelligent features like Wifi controls.
Daikin
Provides robust after sales support and high efficiency systems.
Panasonic
Known for features such as low emissions, quiet operations, and air purifying systems.
LG
Offers stylish and technological new models which have strong cooling performance and remote control capabilities.
Midea
A budget option that has acceptable longevity and energy saving setting suitable for occasional use.
Bottom Line
A System 4 aircon is a smart and efficient option for larger households that need to cool four rooms with one outdoor unit. It optimizes energy usage while maintaining household flexibility. Always consult a certified installer regarding the home’s layout, cooling load, and budget before installation.
FAQ on System 4 Aircon
What does “System 4” mean in air conditioning?
System 4 is a multi split system that cools four different rooms as it uses one outdoor condensing unit to support four indoor aircon units.
Can I use just one indoor unit without turning on the others?
Yes. The indoor units can be controlled individually, so you can turn on only the room you’d like to cool.
Is a System 4 Suitable for a 5-room HDB Flat?
Certainly, provided that four of the rooms need cooling. In the event that all five rooms require air conditioning, you will need a System 5 or a combination of System 3 + System 2 configurations.
Does It Use More Electricity Than Smaller Systems?
Not really. Because of the inverter technology, a System 4 cools at an optimized energy consumption.
