Sizing Your Ductless Mini Split AC: A Comprehensive Guide

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Ductless mini-split air conditioning systems have been around for decades, but they have recently become more popular in residential and commercial settings. Mini-split AC’s are extremely energy-efficient, simple to install and require less maintenance compared to traditional air conditioning units. In addition, they offer independent temperature control, superb air quality, and versatile installation options. If you’re considering a ductless mini-split air conditioning system for your home or office, you’re at the right place. In this blog post, we will provide a complete guide to ductless mini-split AC systems, including how they work, installation options, energy efficiency, and types of
mini splits AC systems available.


How Do Ductless Mini-Split AC Systems Work?

A ductless mini-split AC system consists of two basic components – an outdoor unit and one or more indoor units. The indoor units are attached to the wall or ceiling of your home and connect with the outdoor unit through a small conduit. The conduit contains refrigerant lines, electrical wiring, and a drain. The outdoor unit houses the compressor, which sends the refrigerant to the indoor units for cooling. The indoor units then blow the cool air into your home, and they can be controlled independently, thus allowing customized comfort in any area of your home.


Installation Options

The installation process of a mini-split air conditioning system is relatively straightforward. First, you need to decide where the indoor and outdoor units will be located. Next, the outdoor unit will be mounted on an exterior wall and the indoor unit will be mounted on an interior wall. To ensure your system performs optimally, hire an experienced HVAC technician to install the AC system correctly. The technician will drill a small hole into your wall to run the conduit between the indoor and outdoor units. Ductless mini-split AC systems are available in a single-zone, which can cool one room, or a multi-zone, which can cool multiple rooms.


Energy Efficiency

Ductless mini-split AC systems are exceptionally energy-efficient and come with a high SEER rating (Seasonal Energy Efficiency Ratio). SEER ratings refer to how efficiently an AC system works in warm weather – the higher the SEER rating, the more energy efficient the system. Mini-split AC’s are known for their energy efficiency because they operate on non-ozone depleting refrigerants such as R410A, which reduce your carbon footprint and help you save on energy bills. Overall, ductless mini-split AC systems can reduce your cooling bills up to 30% compared to traditional AC units.


Types of Ductless Mini-Split AC Systems

Ductless mini-split AC systems are available in many types, including wall-mounted, ceiling cassette, concealed duct, and floor-mounted. Wall-mounted systems are the most popular and the most affordable. Ceiling cassette systems are installed into a suspended ceiling, while hidden duct systems are concealed within a ceiling or wall. Lastly, floor-mounted mini-splits can be installed at floor level for easy access and serve as an ideal solution for houses with high ceilings.



Ductless mini-split AC systems are known for their lower maintenance requirements compared to traditional cooling systems. To keep the units clean and functioning optimally, it is necessary to clean the indoor unit air filters regularly and have a certified HVAC technician perform annual maintenance. This regular cleaning and maintenance will ensure your system operates at maximum efficiency and saves you money on energy bills.



Ductless mini-split air conditioning systems are the perfect solution for anyone in the market for a new air conditioning system. These systems are small, energy-efficient, versatile and require less maintenance. In addition, they offer excellent cooling and heating performance, independent temperature control options, and exceptional air quality. Interested in getting a ductless mini-split system installed in your home or office, contact a certified HVAC technician to learn more about the installation process and benefits of a ductless mini-split AC system.