Mini-Split AC Installation

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Updated February 2, 2023

If you are new to the world of indoor units for cooling and perhaps need one to tackle extreme temperatures, you may wonder how to install a ductless split air conditioner. Some of the best air conditioners, after all, are ductless split units. But, you’ll need to know how to size a ductless mini-split air conditioner, as well as clean a ductless air conditioner properly. It may not be a window unit, but it has its own special maintenance. So why choose a ductless split air conditioner, like the Senville mini-split, and how do you install it? Keep reading to find out.


  • Ductless split air conditioning systems, otherwise known as mini-split systems, are great for homes without current ductwork.
  • Contact a professional for the installation of ductless units, as these are complicated systems with plenty of components.
  • Make sure your technician has plenty of experience with ductless mini-split air systems and related indoor units, to minimize any potential confusion.

How to Install a Ductless Split Air Conditioner

This is an extremely complicated job, especially if you only recently learned how to install a portable AC in a crank window or another simple job. In other words, the vast majority of consumers should hire a technician for a professional installation. Here are some tips to get you started with this process.

Insider Tip

Talk to your pro before purchasing a mini-split system to ensure proper integration throughout your home.

STEP 1Contact the Right Pro

Make sure your contractor is well-versed in the ways of ductless split systems, as the designs vary and they all work quite differently when compared to standard duct-based central AC systems. Talk to multiple technicians as you gather estimates, asking them about their overall experience level with ductless split air conditioning units. Feel free to go with the lowest bid but compare that bid with their experience level for the best results.

STEP 2Jot Down Relevant Information

Make sure you take note of any and all information that could be of use to your technician before they arrive to take a look. This includes the details regarding your current setup, the general layout of your property for laying down the outdoor system, and anything else you think of. If you are replacing a current system, write down the make, model, and the reason you are going for a replacement unit in the first place.

STEP 3Get Ready for the Installation

Prepare for the installation in several ways. First, unbox the current system to make it readily accessible for the pro. Next, clean away any obvious outdoor debris along the exterior wall and several square feet surrounding it to speed up the installation process. You should also make sure any power outlets and related appliances are easy to get to, in case they are needed.

STAT: The most common type of mini-split system, called a ductless mini split, can save money over choosing a traditional air conditioning and heating unit that requires ductwork. (source)

Can I install it myself?

The main reason to choose one of these mini – splits? You’ve been learning how to install a central air conditioner and discovered that your home lacks proper ductwork. You then have two options, building out ductwork throughout your home (an expensive installation cost) or going with a ductless split system type of unit (less expensive).


Does the mini-split heat?

Some mini-splits heat and are extremely energy-efficient at doing so, which is par for the course with any high-grade outdoor unit and even some indoor units.

Can I install a mini-split myself?

Installing an outdoor unit yourself is extremely complicated. A DIY installation of ductless systems is possible, but you are better off contacting a pro.

How many square feet does a mini-split cool?

A ductless mini-split system uses British thermal units (BTUs) to measure cooling power. These outdoor unit systems cover 42 to 58 square feet per 1,000 BTUs.

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