Choosing the right air conditioner for your home can be confusing. Users often find themselves in difficulties when comparing System 3 and System 4 air conditioning units. Both are multi-split systems that can cool multiple rooms with just one outdoor unit. However, they differ in several areas like the number of indoor units, cost, and installation complexity. Let’s find the differences between system 4 and system 3 aircon and discover which system is best for your home.
What is a System 3 Aircon?
A System 3 air conditioner is a multi-split system that connects 3 indoor units to a single outdoor unit. It’s ideal for cooling 3 rooms, such as a living room and two bedrooms. This system is great for smaller homes, apartments, or flats that only need cooling for a few rooms. System 3 aircons are cost-effective, energy-efficient, and perfect for homes where convenience and cooling efficiency are important.
What is a System 4 Aircon?
A System 4 air conditioner works the same way like a system 3 aircon but with an added indoor unit. It connects 4 indoor units to a single outdoor unit, making it perfect for homes with 4 rooms to cool. It is great for cooling a living room and three bedrooms. They offer efficient energy savings like System 3, but can manage cooling for more rooms.
Table of comparison – System 3 vs 4
| Aspect | System 3 | System 4 |
| Number of Indoor Units | 3 | 4 |
| Outdoor Unit | 1 | 1 |
| Time to Install | 2-3 hours | 3-4 hours |
| Cost | Lower | Higher |
| Recommended for | Smaller homes or apartments | Larger homes or larger families |
| Energy Efficiency | Good, if only a few units are used | Good, but higher when all 4 units are on |
Key Differences Between System 3 and System 4
Below are the key differences between a system 3 and system 4 aircon:
Number of Indoor Units
System 3
A System 3 air conditioner has 3 indoor units, which are perfect for homes with 3 rooms to cool.
System 4
A System 4 air conditioner has 4 indoor units, making it ideal for homes with 4 rooms to cool.
Cooling Capacity
System 3
With fewer indoor units, the cooling capacity of a System 3 is limited to 3 rooms. It’s great for smaller homes but might struggle to cool larger spaces effectively.
System 4
With an extra indoor unit, a System 4 has a greater cooling capacity. It can efficiently cool 4 rooms and is better suited for larger homes or homes with multiple floors.
Installation Time
System 3
Installing a System 3 air conditioner typically takes 2 to 3 hours. It’s quicker to install because there are fewer units to set up.
System 4
A System 4 takes about 3 to 4 hours to install. This is because there are more components, such as the extra indoor unit.
Cost
System 3
A System 3 air conditioner is generally less expensive. It’s a great choice for those on a budget and don’t need to cool too many rooms.
System 4
A System 4 is more expensive due to the extra indoor unit and more complex installation.
Energy Efficiency
System 3
A System 3 consumes less energy since it only cools up to 3 rooms. You’ll achieve a better balance between cooling and power use with this system.
System 4
A System 4 may use more energy, especially when all 4 indoor units are running. However, modern units come with energy-saving features, such as inverter compressors.
Maintenance
System 3
Maintaining a System 3 is easier and cheaper because there are fewer indoor units to clean and check.
System 4
Maintaining a System 4 requires more attention, as there are 4 indoor units to take care of.
System 3 Or System 4 – Which One to Choose?
Both System 3 and System 4 air conditioners are great options for residential use. However, the choice depends on the size of your home and your cooling needs. A System 3 is ideal for smaller homes with up to 3 rooms. A system 4 is perfect for larger homes or families that need to cool 4 rooms. Whichever system you choose, it’s always a good idea to seek professional advice before making the final decision.
FAQ
Can I install a System 3 in a large house?
Yes, but it will only cool 3 rooms. If your house has more rooms, a System 4 would be a better option.
Is a System 4 more energy-efficient than a System 3?
Not necessarily. System 4 uses more energy when all 4 units are running. Consider features like inverter technology for better energy efficiency.
How long does it take to install a System 3 or System 4?
Aircon installation time for a system 3 is about 2 to 3 hours, while a System 4 takes about 3 to 4 hours.
Can I switch from a System 3 to a System 4 later on?
Yes, but you’ll need a new outdoor unit to support the additional indoor unit. It’s best to consult with a professional before making the change.
