Mini-Split

A mini-split is a ductless heating and cooling system that gives you precise climate control room by room. These compact units work well for additions, older homes without ductwork, or spaces where traditional HVAC just doesn't reach. Whether you're considering installation, maintenance, or repairs, Angi helps you find the right pro and provides the guidance you need to keep your home comfortable year-round.

Related to Mini-Split Service

Mini-Split Service Articles and Advice
Emily Benda Gaylord  •  Apr 10, 2026
What Is a Mini Split System and How Does It Work?
Mini split systems are an energy-efficient option to regulate your house’s temperature. Learn more about how mini splits work to cool or heat your home.
Michelle Nati  •  Apr 10, 2026
How Does a Mini-Split Work?
A ductless mini-split heat pump can cool and heat your home without all of the costly and complicated ductwork. Learn more about how a mini-split works.
Melissa Graham  •  Apr 10, 2026
What Size Mini-Split Do I Need? How to Calculate
This calculator will help you figure out what size mini-split you’ll need to service different rooms in your space depending on their square footage.
Taylor Freitas  •  Apr 10, 2026
Pros and Cons of Ductless Mini-Split Systems
Review the disadvantages of mini-split systems as well as the benefits before buying. Review our breakdown of the mini-split pros and cons.
Nick P. Cellucci  •  Apr 6, 2026
How to Install a Mini-Split System: 10 Steps to Ductless Cooling
When it comes to how to install a mini-split system, every home is slightly different. This guide provides a DIY overview to get you on the right track.
Catherine Hiles  •  Apr 5, 2026
The Ultimate Mini-Split Maintenance Checklist
Keep your AC running smoothly with this mini-split maintenance checklist.
Rachel Presser  •  Apr 5, 2026
How to Install Ductless AC and Keep Cool
Keep cool without complex ductwork. Our guide on DIY mini split systems shows you how to install ductless AC without HVAC assistance.
Ginny Bartolone  •  Apr 4, 2026
How Much Does It Cost to Install a Mini-Split? [2026 Data]
When your window AC isn’t cutting it, but central AC is too expensive, installing a new ductless mini-split AC may be the cooling solution you’re looking for. Find out what a mini-split costs and how to hire the right pros to get the job done.
Find HVAC Pros near you
Share your project details and we’ll match you with up to 3 available pros near you.
Common Mini-Split Service Questions

Not at all. Even if mini-splits aren't common in comparable homes in the same location, they're more likely to increase the property value. If the unit is well-maintained, the buyer will benefit from lower energy bills over time, and the high upfront cost of the mini-split will be accounted for in the home price.

Yes, a mini split AC system can replace central air—and quite easily, too. Since mini splits don’t require ductwork, homeowners can convert their central air system to a mini split to save money and energy. Consult with an HVAC professional to learn more about the process of replacing your central air with a mini split.

Florida rooms can have heat or air conditioning, although not all do. These rooms can be added to the existing HVAC system or use a mini-split system, or they may just use a ceiling fan or the breeze from the windows for cooling. Florida rooms with air conditioning often have glass windows to keep the cool inside instead of just mesh screens.

No, but it’s easier if your mini-split system is installed on an exterior wall rather than an interior one. If you choose to put a mini-split unit on an interior wall, the installation is often difficult and more complicated—exactly what you were trying to avoid when you chose the mini-split over a traditional ductwork-based heating and cooling system.

The HVAC contractor you hire will be able to calculate the size you need, but you can roughly calculate it yourself based on BTUs (British Thermal Units). 

BTUs are a unit of measure to calculate the amount the air conditioning system can cool or heat your space. 

Factors that affect the mini-split size you need include:

  • Square footage of your house

  • Number of floors in your house

  • Number of windows and amount of sunlight shining in the room you want to cool

  • Height of the ceiling

  • Number of people living in the house

The general rule is that every 500 or 600 square feet requires one ton of cooling or 12,000 BTUs.