LS Aircon Servicing Singapore

Ductless Aircon Work

How Do Ductless Aircon Works: A Comprehensive Guide

Ductless aircon works like mini-split air conditioners and is becoming increasingly popular due to their efficiency, versatility, and ease of installation. Whether you’re considering installing a ductless AC system or just curious how it works, this comprehensive guide will walk you through everything you need to know. Homeowners are strongly encouraged to read this article to learn about ductless air conditioners.

How Ductless Air Conditioners Work?

Ductless air conditioners are cooling systems that don’t require ductwork to distribute air throughout a building. Instead, they consist of an indoor unit and an outdoor compressor connected by refrigerant lines. 

This design makes them ideal for homes or buildings without existing ductwork or specific cooling needs in certain areas. The subsequent section will highlight the working of ductless aircons in detail.

How Ductless Aircon Work in Singapore?

Ductless AC works without a regular insulation duct in the home. Therefore, it has several advantages that can attract homeowners. Let’s go through the process of how ductless aircon works:

Working of an Indoor Unit

The indoor unit of a ductless aircon contains the evaporator coil, fan, and air filter. When the AC is turned on, the fan draws warm indoor air over the evaporator coil, which absorbs and cools the heat from the air.

Refrigerant Circulation 

The absorbed heat is transferred to the outdoor compressor unit via refrigerant lines. The refrigerant, typically R-410A or similar, circulates between the indoor and outdoor units, absorbing and releasing heat as it moves through the system.

How Ductless Aircon Work

Outdoor Compressor Unit

The outdoor unit houses the compressor, condenser coil, and fan. The compressor pressurizes the refrigerant, causing it to release the absorbed heat outside. The fan helps dissipate the heat, and the cooled refrigerant returns to the indoor unit to repeat the cooling cycle.

Advantages of Ductless Air Conditioners

Energy Efficiency

Ductless AC systems are highly energy-efficient because they don’t experience energy losses associated with ductwork. They also allow for zoned cooling, so you can only cool specific areas when needed, reducing energy consumption.

Easy Installation

Compared to traditional central air conditioning systems with ductwork, ductless AC units are easier and quicker to install. They require minimal construction work and can be mounted on walls or ceilings, providing flexibility in placement.

Zoned Cooling 

Ductless systems offer zoned cooling, meaning you can set different temperatures for different zones or rooms. This allows for personalized comfort and energy savings by cooling only occupied areas.

Improved Indoor Air Quality

Ductless AC units come with built-in air filters that help remove dust, allergens, and other particles from the air, improving indoor air quality and creating a healthier environment.

Components of a Ductless Air Conditioning System

A ductless aircon works in conjunction with the following components.

  1. Indoor Unit: This includes the evaporator coil, fan, air filter, and control panel. The control panel lets you set temperature, fan speed, and other settings.
  2. Outdoor Compressor Unit: The outdoor unit houses the compressor, condenser coil, fan, and refrigerant lines. It releases heat absorbed from indoor air.
  3. Refrigerant Lines: These lines connect the indoor and outdoor units, carrying refrigerant back and forth to facilitate the cooling process.
  4. Remote Control: Many ductless AC systems come with a remote control for convenient operation and adjustments from a distance.

Ductless Aircon Working

Installation and Maintenance of Ductless Air Conditioners

Ductless AC installation typically involves mounting the indoor unit on a wall or ceiling, connecting it to the outdoor unit via refrigerant lines, and installing it in a suitable location. Professional installation is recommended for optimal performance and efficiency.

Regular maintenance of ductless AC units includes cleaning or replacing air filters, checking refrigerant levels, inspecting and cleaning coils, and ensuring proper airflow. Professional maintenance services can help keep your system running smoothly. If you opt for professional installation or maintenance services, LS Aircon Servicing Singapore provides the best services for aircon installation, aircon chemical washaircon gas top-up, etc.


Ductless aircon works without a regular insulation duct in the building. These machines offer efficient, customizable cooling solutions for homes, offices, and other spaces. Their simple design, energy efficiency, and ease of installation make them famous for modern cooling needs. Understanding how ductless AC systems work and their advantages can help you make informed decisions about cooling your space. Whether you want to upgrade your current cooling system or install a new one, ductless air conditioners provide reliable and effective cooling comfort.

Frequently Asked Questions

Allowing a ductless mini-split heat pump to run continuously can lower energy consumption. It also offers the added benefit of maintaining more consistent temperatures. However, you can still implement minor adjustments to conserve energy further.
A mini-split system is engineered for continuous operation and can be left running 24/7 without issues. Constantly running your mini-split enhances its energy efficiency and improves its ability to maintain desired temperatures through built-in temperature controls.
Regular maintenance is essential for the optimal performance of your ductless system, similar to that of a traditional HVAC system.