No. Mini splits are designed specifically to operate without ductwork, which is why they’re also called «ductless» systems. Each indoor unit delivers conditioned air directly into the room it’s installed in.
Last reviewed: 10/2026
Sources checked: ENERGY STAR
Quick Answer
Instead of ducts, a mini split connects an outdoor unit to one or more indoor units through a small line set (refrigerant lines, power and condensate drain) that passes through a small hole in an exterior wall — typically just a few inches in diameter. [Link to: How Does a Ductless Mini Split Work?]
Why This Matters for Homeowners
- No ductwork installation cost or disruption, which matters a lot for additions, garages, or older homes that were never built with ducts.
- Room-by-room control, since each indoor unit conditions only its own space rather than relying on air traveling through a duct network.
- Less energy loss, since ducted systems can lose conditioned air through leaks or poorly insulated duct runs — a factor that doesn’t apply to ductless systems. [Link to: Ductless Mini Split vs Central AC: Main Differences]
ENERGY STAR notes that ductless systems can be a particularly good fit for homes without existing ductwork, additions, and spaces where installing ducts would be difficult or impractical.
Is Ductwork Ever Still Relevant?
Some «ducted mini split» or «concealed duct» indoor unit styles do use short duct runs to distribute air to more than one outlet from a single indoor unit, hidden above a ceiling, for example. This is different from a full central ducted system, but it is a duct-adjacent option worth knowing about if you want a more hidden installation. A contractor can explain whether this style fits your home.
Mini Split vs Adding Ductwork for Central Air
For homes without existing ducts, the realistic comparison is often: install a multi-zone mini split, or install new ductwork to support central air. [Link to: Ductless Mini Split vs Central AC: Main Differences] Mini splits typically avoid the cost and disruption of adding ducts, but a licensed contractor should quote both paths for your specific home before you decide.
When to Call a Professional
A licensed HVAC contractor can confirm whether a fully ductless system, a ducted-style indoor unit, or traditional ductwork makes the most sense for your home’s layout and goals.
Frequently Asked Questions
If I already have ductwork, should I still consider a mini split?
Some homeowners use mini splits to supplement existing ducted central air in rooms that are hard to condition, such as additions or rooms far from the main system.
Do «ducted mini split» indoor units need full ductwork like central air?
No — they use short, localized duct runs to a single unit’s outlets, not a full home-wide duct network like central air systems.
Related Guides
- [How Does a Ductless Mini Split Work?]
- [Ductless Mini Split vs Central AC: Main Differences]
- [What Is a Mini Split? Complete Beginner’s Guide]