Understanding the Different Types of Aircon Systems for Singapore Homes

Choosing the right aircon system for your home in Singapore isn’t always straightforward — especially with so many options available, from split aircon units to ducted systems and more. Each type comes with its own features, installation needs, and costs, so it’s important to know what suits your space best.

In this guide, we’ll walk you through the four main types of air conditioning systems, helping you understand their differences so you can make an informed choice based on your home layout, lifestyle, and budget.

What are the 4 main types of air conditioning systems?

Let’s break down the four most common types of aircon systems available for residential use in Singapore — including how they work, what makes them suitable for different homes, and their key pros and cons.

1. Split Aircon Systems

The most common choice in Singapore homes, a split aircon system consists of two main components:

• Indoor unit (fan coil): Installed inside the room
• Outdoor unit (compressor): Placed on the aircon ledge or exterior wall

These units are connected by refrigerant piping and electrical lines.

Advantages of split aircon systems:

• Zoning capabilities – control each room’s temperature independently
• Quieter indoor operation compared to window units
• Aesthetic flexibility – indoor units are sleek and mounted discreetly on walls

Split systems also come in multi-split configurations, such as System 3 (three indoor units, one outdoor) or System 4 (four indoor units, one outdoor), making them ideal for HDB flats and condos.

2. Central Air Conditioning Systems

Central air conditioning systems are often used in larger landed homes or condos undergoing major renovation. These systems cool your entire home from a single, central outdoor unit via concealed ductwork.

They typically include:

• A large outdoor condenser
• An indoor air handler (often hidden in the ceiling or utility area)
• A network of ducts and vents throughout the home

Advantages of central aircon systems:

• Clean, uncluttered look – all components are hidden
• Uniform cooling across multiple rooms
• Ideal for spacious homes or multi-storey layouts

Things to consider: Central systems come with a higher aircon price and more complex aircon installation compared to split units. Proper duct maintenance is also crucial for efficiency and air quality.

3. Portable Air Conditioners

Portable air conditioners are compact, freestanding units that cool a single room. They’re a plug-and-play solution — just place them near a window for exhaust venting.

Advantages of portable aircon units:

• No permanent installation required
• Easy to move between rooms
• Great for short-term or rental use

However, they do have limitations such as:

• Lower cooling capacity than split or central systems
• Typically noisier
• Require window access for hot air exhaust

4. Window Air Conditioners

Window air conditioners are self-contained units that fit into a window or specially constructed wall opening. They’re less common in modern homes but still seen in older flats or commercial settings.

Advantages of window air conditioners:

• Affordable initial aircon price
• Simple installation for single-room cooling
• Compact and space-saving

Some common limitations include:

• Noisier operation
• Less aesthetically pleasing
• Not suitable for large or multiple-room cooling

Factors to Consider When Choosing Your Aircon System

When selecting an aircon system for your home, it’s important to consider the following:

• Home size and layout: Multi-room flats (like 4- or 5-room HDBs) may benefit from split or central systems, while smaller units may only need a portable or window unit.
• Budget and pricing: Consider both the initial aircon price and long-term costs. Split systems tend to be more cost-effective for regular use, while central systems require higher upfront investment.
• Installation requirements: Systems like central air conditioning and split aircon units need professional aircon installation. Always ensure your provider is licensed and experienced.
• Energy efficiency: Check the NEA energy rating (4- or 5-tick models are best). Higher efficiency means lower monthly bills and a reduced environmental footprint.
• Design and aesthetics: Central and split systems are more discreet, while portable and window units may be more visible but easier to install.

Choose 81 Aircon for Expert Aircon System Installation and Servicing

Understanding the different types of air conditioning systems is the first step to creating a cool, comfortable, and cost-efficient home environment. Whether you're planning a renovation or simply upgrading your current setup, choosing the right system makes all the difference.

At 81 Aircon, we’re here to help. Our licensed technicians specialise in aircon installations, from split aircon units in HDBs to full central cooling systems for larger homes. We provide clear, upfront aircon prices, honest advice, and professional servicing to ensure your cooling system is built to last. 

Contact us today for a free consultation or a customised quote. Let us help you make the smart choice — and enjoy a cooler home, the 81 Aircon way.