Ductless Mini-Split Installation, Service & Repair in Chicagoland

We carry Mitsubishi’s Mini-Split systems and service all major brands.

At McNally’s Heating & Cooling, we proudly install Mitsubishi Mini-Split Systems, a top-tier choice for
homeowners seeking versatile, energy-efficient climate control for additions, garages, or individual rooms.
Known for cutting-edge technology and reliable year-round comfort, Mitsubishi mini-splits deliver the
perfect balance of innovation and long-term savings, whether you’re upgrading an existing system
or adding HVAC to a new space.

What Is a Ductless Mini-Split System?

A ductless mini-split is a heating and cooling system that works without traditional ductwork. It consists of an outdoor compressor unit connected to one or more indoor air-handling units, each mounted in the spaces you want to condition. Because there are no ducts involved, installation is typically less invasive and the system gives you the ability to control temperature zone by zone.

Mini-splits are a popular choice for:

Additions, sunrooms, and finished basements that aren’t connected to existing ductwork
Garages, workshops, and detached structures
Older homes where adding ductwork isn’t practical
Rooms that consistently run too hot or too cold
New construction where zoned comfort is a priority
Light commercial spaces that need flexible climate control

Benefits of Mini-Split Systems

Flexible Zoning Options: Mini-splits offer precise temperature control in different zones within your home or office.

Ideal for Retrofitting and Expansion: Mini-splits are a practical choice for those seeking to add HVAC capabilities to areas not connected to the central system.

Protect Your EV and Battery Health: Temperature plays a huge role in battery performance and longevity.

Energy Efficiency: This targeted approach can reduce utility bills while maintaining consistent comfort throughout the home.

Environmental Advantages: By using energy-efficient technologies and eco-friendly refrigerants, mini-splits contribute to a reduced carbon footprint.

A ductless mini-split indoor unit mounted on a wall

Ductless Mini-Split Installation

Proper installation is the foundation of a well-performing mini-split system. McNally’s technicians are trained to size and position equipment correctly for the space, ensure refrigerant lines are routed cleanly, and commission the system so it operates as designed.

Before recommending a system, we’ll take time to understand how you use the space, what you’re trying to solve, and what your budget looks like. From there, we’ll walk you through your options: including single-zone and multi-zone configurations, so you can make a confident, informed decision.

Ductless Mini-Split Maintenance & Tune-Ups

Routine maintenance helps your system run efficiently and can reduce the likelihood of unexpected breakdowns. A typical mini-split tune-up includes cleaning or inspecting the indoor air handler and filters, checking refrigerant levels, inspecting electrical connections, and verifying that the system is operating within normal parameters.

If it’s been a while since your mini-split was serviced (or if you’ve never had it looked at) scheduling a maintenance visit is a straightforward way to stay ahead of potential problems. Check out our Pot of Gold Maintenance Plan for more info!

Ductless Mini-Split Repair

If your mini-split isn’t performing the way it should, McNally’s can diagnose and repair it. We carry Mitsubishi’s Mini-Split systems and service all major brands. Our goal is always to give you an honest assessment of what’s wrong and what it will take to fix it.

Why McNally’s For Your Mini-Split?

McNally’s has been serving the Chicagoland area since 1999. We’re a family-owned company, and that shows
up in how we approach every job, with straightforward communication, fair pricing, and service
that doesn’t cut corners.

When you call McNally’s, you’re talking to people who know the Chicagoland climate, understand what local
homes and businesses actually need, and take the time to do the work carefully. We’re not here to oversell
you on equipment you don’t need or rush through an installation to get to the next job.