System 4 aircon units are a smart choice for larger HDB flats, condos, or landed homes with four rooms to cool. They offer efficient cooling across multiple spaces while using just one outdoor unit, saving both space and energy.
If you're looking for a seamless solution to keep your entire home comfortable year-round, a System 4 setup in Singapore delivers reliable performance with streamlined installation at affordable prices.
Why Buy from 81Aircon?
Choosing the right air conditioner is only half the job. Proper installation and reliable support of a 4 system aircon make all the difference. At 81Aircon, we offer more than just competitive prices. Our certified installers ensure every unit is fitted with care and precision so your system runs smoothly from day one.
With years of experience in Singapore our team knows how to get it right the first time with clear, upfront pricing with no hidden fees.
Here’s what our customers have to say about their experience with 81Aircon.
Happy with the service from 81 Aircon Pte Ltd. The job was well done by their men. Their staff were polite and quick to rectify a fault the next day when I called. Special mention goes to Ivy who was patient and meticulous in attending to me. Keep it up !
I recently liaised with the staff Pei Ee and had an air conditioning unit installed. I couldn't be happier with the service. The pricing was very reasonable, making it an excellent value for the quality of work provided. The workmanship was top-notch; the installer demonstrated exceptional skill and attention to detail. I was particularly impressed with the installer's determination, as they fixed the compressor despite heavy rain. Additionally, Pei Ee was very helpful and able to accommodate my urgent installation request, which I greatly appreciated. Overall, it was a seamless experience, and I highly recommend their services!
It's my first time engaging services here & overall is a pleasant experience from start to end. A big thank you to Pei Ee for her excellent service, patiently answering every single doubt I have. She even took the extra mile in arranging slots before the new year despite being full already. Definitely a treasure to the company and deserve extra credit! The two staff that came and installed the air-con deserve a big shout-out too, Hossan and Vasan. Very professional and did their jobs well, workmanship is good and everything is running smoothly. I recommend everyone to engage in aircon service from them ;)
What Is a System 4 Aircon?
A System 4 aircon setup uses one outdoor condenser to power four indoor air conditioning units. This means you can cool four different rooms at the same time while keeping your outdoor space tidy with just a single compressor.
Because all four indoor units run off one system, it’s easier to manage energy use and maintain consistent cooling throughout your home. Each room can still be adjusted individually, giving you flexibility without the clutter of multiple outdoor units.
Best System 4 Aircon Brands in Singapore
Daikin System 4 Aircon
Daikin is known for its reliable performance and energy-saving features like Intelligent Eye and Coanda Airflow. It’s a great choice for families who want even cooling across multiple rooms, with the bonus of smart control and air purification. Daikin’s System 4 units are efficient, quiet, and well-suited for everyday home use.
Mitsubishi offers strong cooling power with whisper-quiet operation. Their System 4 aircon units are ideal for users who prioritise durability and long-term efficiency. With features like dual barrier coating and advanced inverter technology, Mitsubishi is a solid option for those who value low maintenance and performance in the long run.
Panasonic aircons come packed with user-friendly features like nanoe™ X air purification and AI Eco Mode. Their System 4 models are a good fit for price-conscious homeowners looking for smart features without compromising on comfort. Panasonic combines affordability with decent energy performance, making it a popular entry-level choice.
Multi-room cooling made easy: Cool up to four rooms simultaneously with just one outdoor unit, keeping your home comfortable without needing multiple bulky compressors.
Energy efficiency: System 4 aircons use inverter technology that adjusts power based on demand, helping to reduce electricity consumption and lower your bills.
Cost savings: By sharing one outdoor unit, installation and maintenance costs are generally lower compared to having separate systems for each room.
Smart controls for convenience: Many System 4 models come with Wi-Fi connectivity and app controls, so you can adjust temperatures remotely for each room.
Space-saving design: With only one outdoor condenser, your balcony or outdoor space stays neat and uncluttered, perfect for Singapore’s compact living environments.
Is a System 4 Aircon Right for You?
A System 4 aircon is ideal if you have a 4-bedroom home, a spacious HDB flat with multiple rooms, or a larger condo that needs efficient cooling throughout. It lets you cool several rooms independently while using just one outdoor unit, saving space and energy.
When choosing your System 4 setup, consider the size of each room to pick the right BTU capacity. For example, bedrooms typically need around 9,000 BTU, while living rooms or larger spaces may require 12,000 to 18,000 BTU for effective cooling.
If your rooms vary greatly in size, a System 4 aircon offers flexibility to mix and match indoor units based on specific cooling needs.
Frequently Asked Questions About System 4 Aircons
System 4 refers to an air conditioning setup where one outdoor unit powers
four indoor aircon units, allowing you to cool four separate rooms using a
single system.
Prices typically range from S$4,000 to S$7,000, depending on the brand,
indoor unit capacities, and installation requirements.
Yes, many HDB flats can accommodate System 4 aircons, but it depends on the
available outdoor space and
installation feasibility
.
A site survey can confirm this.
One outdoor condenser unit is connected to four indoor units, each installed
in different rooms. The outdoor unit supplies cooling to all four units
while allowing individual temperature control.
The main difference is the number of indoor units powered by the outdoor
unit.
System 3 aircons
cool three rooms, while System 4 cools four rooms.
