You don’t have to tear apart your home to get intelligent cooling. An electric ductless mini split air conditioner installation is the perfect solution for adding air conditioning to homes that aren’t compatible with traditional HVAC systems or window units.

Ideal for additions, finished basements, sunrooms and bedrooms, Ductless mini split AC units are gaining popularity for their ability to provide an unlimited number of climate zones via remote control, as well as their remarkably quiet and extremely efficient operation. Ductless mini split air conditioner installation is quick and easy, making it ideal for the many home situations where a ductless air conditioner is needed.

Looking to ditch your window unit? Ductless systems are a flexible and cost-effective solution to replace electric baseboard heaters and inefficient window units.

How it Works

Similar to traditional air conditioning units, a ductless air conditioner operates with two main components: an outdoor compressor/condenser and an indoor air handler. However, true to their name, mini splits differ from traditional heating and cooling systems by operating without ductwork.

Working similarly to larger HVAC systems, ductless mini split air conditioners work with an indoor and outdoor unit. The outdoor unit pulls in air through one of its vents, and then sends the air to the indoor units through a small tube. The indoor unit then electrically heats or cools the air and delivers it directly to different zones in your home.

Requiring minimal installation work compared to most HVAC units, the indoor components of a ductless mini split AC system are mounted to a wall anywhere that has access to electricity. Typically, mini split AC units are installed in specific zones or rooms of the home and each unit is controlled by remote.

Ductless Systems are Perfect For:

  • Smaller, or historic homes with limited space for ductwork
  • Homes with limited outdoor space for placing central air units
  • Homes without ductwork already installed
  • Supplemental cooling of additions, sunrooms, or newly finished basements
Mitsubishi Ductless Mini Split Air Conditioned Home

Why Ductless Mini Split Installation?

Multiple Climate Zone Controls

Because each indoor unit has its own individual thermostat, a ductless mini split AC system allows you to control each zone in your home independently and turn off zones that are not in use. Many models can pair up to four indoor units to one outdoor compressor, with each one individually controllable for optimal comfort.


Because ductless air conditioners operate without bulky ductwork, they are less susceptible to leaks that account for up to 30% of energy consumption in traditional systems. Additionally, the multiple indoor units allow you to control which rooms are being heated or cooled, maximizing efficiency by turning off airflow to rooms you aren’t currently using. This makes mini split ac systems up to 40% more efficient than conventional HVAC.

Ease of Installation

For many homes with space constraints or plaster walls that don’t allow them to fit larger ductwork used in traditional systems or window units, ductless mini split air conditioner installation is a flexible, minimally-invasive alternative. The small, simple connections from outdoor to indoor units mean homeowners have choices when it comes to the interior design of their system.

Before making any decisions, make sure to read our Ducted vs. Ductless Heat Pumps Blog.

Considerations for Your Home

Output and Location

Getting the correct size mini split model for your home is essential to maximizing its efficiency. If a unit is oversized or poorly located within a home it can result in short-cycling, which drastically decreases a system’s efficiency. For proper ductless mini split installation, be sure to consult with a professional.

Installation Costs

Due to their more intricate design and need for a trained professional, the initial setup costs of a ductless mini split AC system are typically higher than that of window units or other non-traditional air conditioning systems. However, these costs are generally offset long-term by lower operational costs, efficient design, and ease of maintenance to mini split air conditioner units.


Have questions, or interested in installing a ductless mini split air conditioner unit in your home? The experts at Unique Indoor Comfort would love to help!


How long do ductless mini split systems typically last?

With proper installation and maintenance, mini split ac systems can last for 10+ years. As with any HVAC unit, efficiency and reliability of the system tends to decrease with age, so you may want to consult a professional about installing a new system after 10 years.

What size mini split system does my home need?

This is a very popular question. Part of the attractiveness with mini splits is their ability to be used on a room-to-room basis, however it’s vital to have a proper heat load calculation done by a professional on any area that you’re looking to condition with mini splits. This is the only accurate way of measuring what size mini split AC unit you will need.

Where can a ductless mini split system be installed?

Mini split air conditioners can more or less be installed any wall or ceiling in the home that has a solid area the width of the unit – roughly 3 feet – and can provide the unit access to a power source and the outdoor equipment. Installation is minimally invasive compared to typical HVAC units, only needing a 3-inch hole in the wall. The most popular areas for mini split AC installation include above windows and doorways, and in the corners of rooms.

Can a split system AC system replace my window unit?

Yes, it can and there are many advantages to replacing a window unit with a ductless mini split system. To learn more about replacing your window unit, read our Split Type Air Conditioner Blog.

How much does a mini split air conditioner cost?

The cost for a mini split AC system varies depending on the size of the room, number of zones you need to heat and cool, and the type of system you choose. It is best to consult a professional in order to determine what unit is best for your home and to give you an accurate cost of installation depending on your situation.

How many mini split units do I need for my home?

The amount of indoor mini split units you’ll need for your home depends on the size of your space and the number of rooms you want to heat or cool. Some homeowners have as little as one or two units that target specific areas of the home such as a garage or addition, but others have as many as five to control the climate throughout their entire home.

Have more questions about Ductless Mini-Splits? Contact us today! >

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