Ductless Mini-Split AC Installation & Repair

Frostline installs and services ductless mini-split AC across coastal Palm Beach County. Mini-splits cool rooms a central system can't reach, with no ductwork, and they're sized to pull Florida humidity. We put in single-zone and multi-zone systems, and we repair them too.

  • Single-zone & multi-zone, no ductwork
  • Sized for Florida humidity, install & repair
  • Licensed, insured & bonded
(561) 332-2104

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Where a Ductless Mini-Split Makes Sense

A mini-split cools a space without ductwork, on its own thermostat. These are the spots where it's usually the right call.

Frostline technician planning a ductless mini-split with a homeowner

A room addition or converted space

When you add a room, central AC often can't keep up, and extending ductwork gets expensive. A mini-split conditions the new space on its own, with its own thermostat.

A compact ductless outdoor unit beside a Florida home

A garage, sunroom, or Florida room

Garages and sunrooms run hot and usually aren't on the central system. A single-zone mini-split makes them usable year round and pulls the humidity these rooms collect.

Wall thermostat giving a single room its own temperature control

An older home with no ductwork

Older homes without ducts are hard to cool evenly. A mini-split, or a multi-zone system, cools the house without the cost of adding ducts or a full central AC installation.

Refrigerant gauges and tools for a ductless mini-split install

A hot room central air can't reach

If one bedroom or office never cools like the rest of the house, a mini-split fixes just that room, on its own control, instead of oversizing the whole system.

Frostline technician servicing a ductless outdoor unit

Replacing noisy window units

Window units are loud, block the view, and leak air around the frame. A wall-mounted mini-split is quieter, more efficient, and seals the opening for good.

Frostline technician installing a ductless mini-split wall unit

What's Included in a Mini-Split Installation

Frostline technician installing a ductless mini-split wall unit

We handle the whole job, from sizing the system to the final startup, so it runs efficiently and quietly from day one.

Right-Sizing for Florida Humidity

Bigger is the most common mini-split mistake here. An oversized head cools the room fast, then shuts off before it pulls any humidity, so the space feels cold and clammy. We size the unit to the room and bump it up for Florida heat, so it runs in long, low cycles that actually dehumidify.

Single-Zone & Multi-Zone Systems

A single-zone system pairs one outdoor unit with one indoor head, ideal for a single room or addition. A multi-zone system runs several heads off one outdoor unit, which keeps the side yard clear when you're cooling a whole house. We help you pick the setup, and we install and service all the major ductless brands.

Line Set & Mounting

The indoor head and the outdoor unit connect through a small refrigerant line set, a control wire, and a condensate drain, run through one neat wall penetration. We keep the line set as short as the layout allows, since long runs cost efficiency, and we seal and secure everything so it holds up to coastal weather.

Mini-Split Repair & Service

We don't just install mini-splits, we fix them. Low refrigerant, a head that won't start, weak airflow, water dripping from the indoor unit, or a blinking error code on the remote, we find it and repair it. Regular AC maintenance keeps the filters and coil clean so the system holds its efficiency.

Efficiency & Dry-Mode Dehumidification

Mini-splits run on inverter compressors that ramp up and down instead of slamming on and off, which is why they sip power and control humidity so well. Most have a dry mode that pulls moisture without overcooling, which is ideal for Florida's spring and fall. We set it all up and show you how to run it.

Our Process

How a Mini-Split Install Works

1

In-home assessment and quote

We come out, look at the space, and size the system. You get a written quote with the layout, the zones, and the price.

2
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Sizing and equipment selection

We match the right size and number of zones to your home and budget. You see the equipment, the efficiency rating, and the cost before anything is ordered.

3

Installation day

We mount the indoor heads, set the outdoor unit, run the line set, and make the electrical connections. Most single-zone installs are done in a day.

4

Commissioning and walkthrough

We pull a vacuum on the lines, charge the system, test each zone, and walk you through the remote and the warranty before we leave.

Why Choose Frostline for Ductless Mini-Splits

Frostline technician on a ductless mini-split job

Ductless mini-splits are part of what Frostline does as an AC specialist. The technicians install and service mini-split and central systems every day.

We size every mini-split to the room and to Florida's humidity, install single-zone and multi-zone systems, and handle the permit. Technicians are licensed, insured, and bonded, Frostline is BBB accredited, and the work is backed by a warranty.

Frostline installs and repairs ductless mini-splits across Delray Beach and coastal Palm Beach County, where salt air and humidity are hard on equipment. If your whole house needs cooling instead, we also handle central AC installation and service.

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Frostline technician on a ductless mini-split job

What You Get With Frostline

Free Estimates

We diagnose before we quote, at no cost.

Right-Sized Systems

Sized to the room and Florida's humidity.

Fast Response Times

Most single-zone installs done in a day.

Upfront Pricing

Diagnosis before any quote. No upsells.

Common Ductless Mini-Split Questions

Answers to the questions homeowners ask most before a ductless mini-split install.

How much does a ductless mini-split cost to install?

It depends on a few things: single-zone versus multi-zone, how many indoor heads, the size and efficiency of the equipment, and how far the line set has to run. One head in a single room is the low end; a multi-zone system for a whole house is more. We give you a written quote after we see the space, with no upsells.

Single-zone or multi-zone, which one do I need?

A single-zone system cools one room or space with one indoor head. A multi-zone runs several heads off one outdoor unit, which is the move for a whole house or a few rooms, and it keeps you from crowding the yard with multiple condensers. We help you decide based on the rooms you want to cool and your outdoor space.

Do ductless mini-splits work in Florida humidity?

Yes, and they handle humidity better than most central systems, as long as they're sized right. Their inverter compressors run in long, steady cycles that wring out moisture, and most have a dry mode that pulls humidity without overcooling. The catch is sizing: an oversized unit short-cycles and never dehumidifies, which is why we size up for Florida heat instead of guessing.

Can I install a mini-split myself?

DIY kits exist, but a permitted install is not a DIY job in Florida. It needs an electrical hookup, refrigerant handling that, under EPA rules, requires a licensed tech, and a permit and inspection. A DIY or unpermitted install also voids most manufacturer warranties. We handle the permit, the install, and the inspection, so it's all covered.

What are the downsides of a ductless mini-split?

Two honest ones. The indoor head is visible on the wall, so it's not hidden like a vent, though the units are slim and quiet. And the upfront cost per room can run higher than a window unit. For most homeowners the efficiency, the quiet, and the room-by-room control more than make up for it over the life of the system.

Do mini-splits heat too, or just cool?

Most ductless mini-splits are heat pumps, so they cool in summer and heat on Florida's cold snaps, all from the same unit. They're efficient at the mild temperatures we get here, which makes them a good fit for a room the central system leaves chilly in January.

Do you repair mini-splits, or only install them?

Both. We install new ductless systems and we service and repair existing ones, no matter who put them in. Low refrigerant, a head that won't start, weak airflow, water dripping inside, or an error code on the remote, the same team that handles our AC repair works on ductless systems too.

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