Putting in a regular air conditioning system is a big task requiring a licensed professional by law. But now, more people are turning to ductless mini splits, which you can install yourself. It takes some time and a few helpers, but if you are good with home projects, you can handle setting up a ductless mini-split.

How do you install a mini-split system at home? Follow our guide to learn every step and do it effectively. 

5 Things to Consider Before Installing a Mini-Split System

Considering some things before installing your mini split system can help ensure everything goes smoothly and safely. You should be aware of the following: 

1- Electrical Work

Before installing the ductless mini-split system, make sure it has an electrical circuit. It means it should be the only thing using that particular electrical line in your house. 

Getting assistance from a qualified electrician is preferable if you need help doing this securely.

2- Placement

Where you put the indoor part of your mini split system matters. It’s easier to install it on a wall that faces outside because then you don’t have to worry as much about things like piping and wiring. 

Installing it on a wall inside your house can be more complicated because you might need to run pipes and wires through the walls.

3- Warranty

Some companies will only honor the warranty on your mini split system if it’s been installed by a professional. 

So, even though you might be able to do it yourself, it’s a good idea to check the warranty terms and hire a professional installer just to be safe.

4- Heights and Ladders

If you are installing the system in a room on the second floor of your house, you’ll need a ladder tall enough to reach it. 

Safety is important, so if you have access to scaffolding (those temporary structures you see at construction sites), that’s even better because it’s safer to work on than a ladder.

5- Single Unit or System

You can buy a mini-split system that cools just one room or one that cools multiple rooms using one outdoor unit. 

It’s like having one big air conditioner outside your house that connects to several smaller ones inside.

DIY Step-by-Step Guide to Install a Mini-Split System

Once you have picked out where to put your indoor air-handling unit and outdoor condenser and made sure there’s a dedicated power source for the whole system in your circuit breaker, here’s what to do next:

1- Choose the Location

Choose a site that works well for both indoor and outdoor units. Ensure the indoor unit is placed where airflow is not obstructed and where it can evenly distribute air throughout the room.

Place the outdoor unit in an area with good ventilation, away from obstructions like bushes or walls.

2- Install Mounting Brackets

Attach the mounting brackets for the indoor unit following the manufacturer’s guidelines. To make sure they are straight, use a level.

Make the required holes in the wall for the brackets, and if necessary, use the proper anchors.

3- Install the Indoor Unit

Ensure the indoor unit is level and firmly mount it onto the brackets. As the manufacturer directs, connect the electrical wire, condensate drain, and refrigerant lines.

To stop air leaks, seal any openings surrounding the device.

4- Install the Outdoor Unit

Place the outdoor unit on a level surface, preferably a concrete pad, to reduce vibration and noise. Attach the condensate drain, electrical wiring, and refrigerant lines to the outside unit.

Ensure the area around the unit is adequately cleared for maintenance access and airflow.

5- Vacuum and Test the System

Use a vacuum pump to clear the refrigerant lines of air and moisture. Use a leak detector or soap bubbles to look for leaks.

Release the refrigerant into the lines by the manufacturer’s instructions once the system is sealed and leak-free.

6- Electrical Connection

As directed by the manufacturer and local electrical codes, connect the interior and outdoor units to the electrical supply.

Test the electrical connections to ensure they are safe and adequately insulated.

7- Test and Commission

Activate the system to check its capabilities. Inspect the indoor unit’s temperature distribution and airflow. Make sure the outdoor unit is running silently and smoothly.

Achieve the ideal temperature and fan speed to ensure the system is heating or cooling efficiently.

8- Final Checks

Ensure everything is secure by checking all fastenings, seals, and connections twice. Go over the manufacturer’s recommended maintenance and give the homeowner information on how to maintain it regularly.

9- Professional Inspection (Optional)

Even if some people can install it themselves, it’s always a good idea to inspect it by a qualified HVAC technician to ensure it satisfies safety and performance requirements.

Should You Do DIY Mini-Split System Installation? 

Deciding whether to install a mini-split system yourself involves thinking about the good and bad sides of doing it. On the one hand, doing it yourself can help you develop new skills and save money. Additionally, you have more control over the timing and method of the installation. 

So, before you decide to do it yourself, consider whether you have the right skills and tools and are willing to take on the risks. Let’s discuss the pros first: 

1- Cost Savings

The desire to save money on installation is one of the main motivations for DIY installation. You can save money by doing it yourself rather than hiring an HVAC specialist.

2- Learning Experience

Installing a mini-split system can be a great learning opportunity. You get hands-on experience with electrical work, plumbing, and HVAC systems, which can be valuable skills for future projects.

3- Flexibility

You have more control over the installation procedure when you do it yourself. The indoor and outdoor units can be placed anywhere you wish, and the configuration can be altered to suit your tastes.

4- Timing

You can install the system at your own pace without waiting for an appointment with a professional installer. It can be convenient if you need to fit it around other home repair jobs or have a hectic schedule.

But there are other dangers. It could be harmful if you’re not familiar with it.

1- Safety Risks

Working with electrical wiring and refrigerant lines might be dangerous if you are not properly trained.

The possibility of electrical shocks, refrigerant leakage, and other safety issues is increased with do-it-yourself installations.

2- Warranty Concerns

Many manufacturers will only honor warranties provided a licensed HVAC specialist installs the system.

Should an issue arise during your do-it-yourself installation, you can nullify the guarantee and bear the cost of any necessary repairs or replacements.

3- Code Compliance

HVAC installations must adhere to building rules and regulations to guarantee compliance and safety. DIY installations might need to be better. It can result in fines or the necessity for pricey repairs.

4- Time and Effort

Mini-split system installation can be difficult and time-consuming, particularly for inexperienced technicians. You could have saved time by hiring a professional instead of spending it investigating, organizing, and carrying out the installation.

Contact professionals to Install Your Ductless Mini Split

Hiring an expert to install your ductless mini-split makes sense if you are not into do-it-yourself projects. 


The Bee Heat and AC provides comprehensive ductless AC repair, installation, and maintenance services. Get in touch now. 

People Also Ask!

Can I install a ductless mini-split system myself?

You can, but you must have the abilities and know-how required to guarantee safe and correct installation.

How long does it take to install a ductless mini-split system?

Installation periods range from a few hours to a day, depending on the number of indoor units and the intricacy of the installation.

Do ductless mini-split systems need to be maintained regularly?

Regular maintenance, filter cleaning, and refrigerant level checks are necessary for best performance and efficiency.