What is a Mini Split?

In the quest to find the most efficient and flexible cooling and heating solution for your home, you might have come across the term “mini split.”

A mini split, also known as a ductless mini-split system, offers an alternative to traditional central systems and window air conditioners.

But what exactly is a mini split and how does it function? This article will help you understand all about mini splits, from their design and operation to their benefits and potential downsides.

What is a Mini Split?

A mini-split is a type of air conditioning system that separates the outdoor compressor and condenser from the indoor air-handling unit. This is in contrast to central systems where the components are largely housed together.

The outdoor and indoor units of a mini-split are connected by suction tubing, power cables, and a condensate drain, facilitating heat exchange.

A distinguishing feature of mini-splits is that they do not require ductwork, which is why they are often referred to as ductless systems or ductless mini-split systems.

How Does a Mini Split Work?

The mini split operates on the principle of heat energy transfer. The indoor unit, also known as the evaporator, extracts heat from the indoor environment and transfers it outside through the refrigerant circulating in the system.

Conversely, in heating mode, the outdoor unit absorbs heat energy from the outdoor environment and transfers it inside.

The process is facilitated by the outdoor compressor unit, making mini-splits highly efficient in both cooling and heating.

What are the Types of Mini Splits?

Mini-splits come in two primary types: single-zone and multi-zone systems. A single-zone mini-split serves one indoor area, while a multi-zone system has multiple indoor air handlers linked to one outdoor unit.

Each indoor air-handling unit can be controlled independently, offering flexibility in temperature management.

Benefits of a Mini Split

There are many benefits associated with mini-split air conditioners. Firstly, they are energy efficient. The absence of ductwork minimizes energy losses, leading to considerable energy savings on your energy bills.

Secondly, they provide versatile mounting options. The indoor units can be wall-mounted, ceiling-recessed, or floor-mounted depending on your preference and the layout of your space.

Lastly, mini splits come with a remote control for easy operation. The multi-zone systems even allow for different temperature settings in different rooms.

Downside of a Mini Split

Despite the many advantages, mini splits do have some drawbacks. The initial installation costs can be higher than traditional air conditioners. Additionally, the exterior of mini-split units, both outdoor and indoor, is more visible than that of ducted systems.

This might affect the aesthetic appeal for some homeowners.

Where Can You Mount a Mini Split?

As mentioned earlier, the indoor units of a mini-split system can be mounted in different ways to fit your space. Wall-mounted options are most common, but floor-standing models or ceiling recessed cassettes are also available.

The outdoor compressor unit should be installed in a well-ventilated area outside the building.

Are Mini Splits Efficient?

Yes, mini splits are highly efficient. Their Seasonal Energy Efficiency Ratio (SEER) ratings are often higher than those of traditional air conditioners, resulting in lower energy consumption and savings on energy bills.

Should You Get Mini Splits over Central AC?

Mini splits are a great option for those looking for flexible, efficient cooling and heating. They are especially beneficial for homes without existing ductwork or for additions where extending ductwork is impractical or costly. However, for larger homes with existing ductwork, a central air conditioner might be more practical.

Can a Mini Split Heat?

Yes, most mini splits are essentially heat pumps. The mini-split heat pump can reverse the refrigeration cycle, absorbing heat from the outdoor air and transferring it inside, making it an efficient heating solution in cold weather.

Do Mini Splits Dehumidify?

Mini splits do indeed have a dehumidification function. While cooling, they reduce the temperature of the air, leading to condensation of the moisture in the air.

The dehumidified air is then circulated back into the room, contributing to a more comfortable environment.

Are Mini Splits Better Than Window ACs?

Mini splits offer several advantages over window ACs. They are quieter, more energy-efficient, and do not obstruct windows. However, window ACs are typically easier and cheaper to install.

How Much is a Mini Split?

The cost of a mini split varies depending on the type (single or multi-zone), brand, and model. On average, a mini split can range from $500 to $2,000 for the system itself, not including installation.

How Much to Install a Mini Split?

Installation costs for a mini split can range from $500 to $2,000 depending on factors such as the complexity of the setup and labor rates in your area.

It is recommended to get quotes from multiple HVAC professionals to get a more accurate estimate.

Can You Install a Mini Split Yourself?

While it’s possible to install a mini split yourself, it’s generally recommended to hire a professional HVAC technician. A professional installation ensures the system is installed correctly, operating efficiently, and not voiding any warranties.


In summary, a mini split is a highly versatile and energy-efficient cooling and heating solution, especially for homes without existing ductwork.

While they require a greater initial investment, the energy savings over time and the enhanced comfort they provide can more than justify the cost.

Whether you choose a mini split or another type of system depends on your specific needs, budget, and the architecture of your home. Always consult with a professional HVAC technician before making your decision.

About Roy Cohen

Roy Cohen has a burning passion for heating, cooling, and ventilation. He aims to help you save money on expensive repairs and bring you the best HVAC products. He has years of experience behind him in HVAC repair and garage maintenance.

You can find Roy at his LinkedIn or his email: [email protected]

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