How Ductless AC Systems Work A Comprehensive Guide for Homeowners

Keeping our homes cool and comfortable during hot summer months is a must. And, having an efficient AC system is the key to beat the heat and stay comfortable. Ductless AC systems are one of the cooling options that homeowners can consider. These systems have gained popularity over the years due to their energy efficiency and easy installation process. However, how do these systems really work? And, how do they differ from window AC units? In this comprehensive guide, we’ll explore how ductless AC systems work and what homeowners should know before making the switch.


Introduction to Ductless AC Systems

Ductless AC systems use a small outdoor unit and one or more indoor units that are installed in different rooms of the house. These units are connected by refrigerant lines and do not require ductwork to cool the air. Ductless AC systems work on the same principle as central AC systems – they cool the air by removing the heat and humidity from it. However, they eliminate the need for ductwork, making them an ideal option for homeowners who don’t want to deal with complex installation processes.

How A Ductless
AC System Works

Ductless AC systems use a two-part system. An outdoor unit, and one or more indoor units, depending on the house’s size and cooling needs. The outdoor unit consists of a compressor, a fan, and a condenser coil, while the indoor units have an evaporator coil, fan, and air filter. The system cools the air by absorbing it through the indoor unit’s evaporator coil. The refrigerant circulates between the indoor and outdoor units, and the heat is exchanged between the air and the refrigerant. The cooled air is then circulated back into the room through the indoor unit.

Fujitsu Outdoor Mini Split Condenser

Benefits of Ductless AC Systems

Ductless AC systems have several advantages over traditional AC systems. One of the primary benefits is their energy efficiency. Since they don’t require ductwork, there is no loss of cool air through leaks or poor insulation. Additionally, you have greater control over the temperature in each room, since the indoor units can be controlled individually. Ductless AC systems are also more silent and require minimal maintenance.

Eco Friendly and Efficient

Energy Efficient



Zone Control

Fujitsu Floor Mounted Mini Split

How Ductless AC Systems Differ from Window AC Units

While ductless and window AC units work on similar principles, they differ in several ways. Window AC units are designed to cool a single room, while ductless systems can cool multiple rooms, depending on the number of indoor units installed. Window AC units are also less expensive, but they are less energy-efficient and can be noisy. Additionally, window AC units take up valuable window space, while ductless AC systems offer a more aesthetic and flexible installation option.

Finally, homeowners must know that the installation of ductless AC systems is different from window AC units. While window AC units can be installed without professional help, ductless AC systems require specialized installation services. A certified professional technician should be called to install and maintain the system. The installation process includes fitting the outdoor and indoor units, connecting the refrigerant lines, and installing the controls. 

Ductless Mini-Split Install Over Couch

Ductless AC systems are an excellent option for homeowners considering an efficient and energy-saving cooling alternative. They offer flexibility, energy efficiency, and individual temperature control for each room. Although ductless AC systems have a higher upfront cost, they are significantly less expensive over the long run. By understanding how ductless AC systems work, homeowners can make informed decisions about their home cooling options. Remember, professional installation and proper maintenance is essential to ensure the system works efficiently for years to come.