How do I Install a Ductless Air Conditioner?

Depending on your knowledge level installing a ductless air conditioner can be a simple task, or it can be a momentousness one. Please be aware that if you purchase a ductless air conditioner that you do NOT have to install the unit yourself. This is very important to know as many consumers assume that since they bought the product online or in a store that they cannot get a technician out to their home for an install.

Ductless Air Conditioner Layout
Ductless Air Conditioner Layout – Courtesy of

Do you have a local HVAC company? I’m sure you have dozens to choose from. Here’s an idea, you can have one of their technicians come out and install it for you. The best part is that the price might be negotiable. And you won’t know unless you ask!

The ductless air conditioner will come with instructions. After all, is a major system. What major system or appliance doesn’t come with an instruction manual? There are many types of mini splits or ductless air conditioners on the market. Therefore, it would be difficult to write about a one size fits all type of section here. However, we can give you an overview of what to expect when installing a mini split system.

Disclaimer: The steps below do not constitute advice. You should not perform these steps unless you coordinate with a professional electrician or ductless air conditioning installer under their supervision. There are seven general steps to installing a ductless air conditioner. In order, they are:

  1. Buy Required Tools
  2. Assemble the Wall Bracket
  3. Mount the Indoors Unit
  4. Drill a Hole and Feed Refrigerant Piping
  5. Mount the Outdoors Unit
  6. Connect Piping to Electrical Unit
  7. Testing the system and setting up the WiFi

Disclaimer: The steps above do not constitute advice. You should not perform these steps unless you coordinate with a professional electrician or ductless air conditioning installer under their supervision. Let’s get specific and expand on these of these in the list.

Buy Required Tools

What good is your installation attempt if you don’t have the proper tools? Start off on the right foot by having everything you need. If you do, you won’t have to run to the hardware store in the middle of your install. You can have your tools on hand even before your mini duct system arrives. Just search online for installation manual of the ductless air conditioner you are ordering. It’ll list the required tools and anything else you might need.

Assemble the Wall Bracket

A wall bracket helps the indoors unit stay attached to the wall. As you read in the instructions, the bracket should be installed higher up on the wall. Make sure the outdoor unit will be close by on the other side of the wall. This will mean you’ll have to use less pipe to connect the two units.

Mount the Indoors Unit

Now that the wall bracket is in place, it’s time to attach the indoor unit. These units aren’t light, so you want to make sure you secure it tightly. This will mitigate any possible falls of the unit, which would cause an accident.

PIONEER Air Conditioner Piping
Air Conditioner Piping

Drill a Hole and Feed Refrigerant Piping

If the indoors and outdoors units are directly on opposing sides of the wall, you won’t have to use lengthy piping. Try to keep the piping and drain hose as close to the wall as possible. You can even secure it in place by using metal brackets.

Mount the Outdoors Unit

You’ll mount the outdoors unit in a similar way you mounted the indoors unit. Remember, these steps are a general overview and each ductless air conditioner is different; therefore, you’ll need to refer to your specific instruction manual. The outdoors condenser unit will probably include a support piece, cross support piece, and many screws, bolts, and brackets. The outdoors unit is the heavier of the two!

Connect Piping to Electrical Unit

This is the step where is most important to defer to a licensed electrician or other professional if you’re not used to electric work. The electrical components will need to be connected to the outdoors unit, indoors unit, and, most importantly, the electric power supply or electrical box.

Testing the System and Setting up WiFi

Finally, all you need to do at this point is press the power button! Does it work? If so, you’re going to have a very enjoyable environment and atmosphere in the room it’s installed in. Conduct a comprehensive check of the remote control and the system for full functionality.

Another note, and an honorary mention, is that you can set up WiFi in some units. You’ll be able to operate the ductless air conditioner from your smart phone. Let’s say you turn your mini split system off during the day while you’re at work. Before you get home, you can remotely turn the air conditioner on and the room will be nice and chilly by the time you get home! Technology is amazing. And we want to make sure your ductless air conditioner lasts as long as possible. That’s why routine maintenance is required. Let’s take a look at what that entails.


Well, there you have it, folks! I hope that I was able to answer your question and also shed a bit of light on ductless air conditioners in general. If you find yourself wanting to read and learn more about ductless air conditioners then I highly suggest you take the time and read our in-depth buyer’s guide.

Remember though folks, that ductless units aren’t your only option. After reading this article if you find that you are leaning towards an alternative air conditioner such as a portable or window unit consider checking out our best of guides on these. Click here for our best window air conditioner article and click here for our best portable air conditioners. There are many ways to stay cool nowadays, the question is which one will you choose?

If you have any further questions about ductless air conditioners you can contact us. Also, if you want more guides and articles like this, make sure you subscribe to our email list. As always, thanks for reading! And make sure to return in a few days for a new article from RefrigerantHQ.