Ductless Mini-Splits in Lexington, SC

A ductless mini split gives a Lexington homeowner a way to fix one problem room, or condition a space that never had air, without tearing into walls for ductwork. Each system pairs a compact outdoor unit with one or more indoor heads, connected by a small bundle of copper refrigerant lines, a control wire and a drain line that pass through a hole about the size of a coffee mug.

If yours is already acting up, go straight to mini-split repair.

Which rooms are a good match for ductless AC and heat?

Mini-splits earn their keep in rooms that sit at the end of the line. In the two-story vinyl subdivisions around Lexington and Red Bank, the bonus room over the garage often hangs off a long attic duct run and sits under a roof that bakes all afternoon. The central system can run nonstop and that room still lags several degrees behind the rest of the house.

Other common fits:

• Garages and workshops. A converted garage or a detached shop rarely has ductwork, and extending the house system to it can overload that system.
• Sunrooms. Glass walls gain heat fast in a long Midlands cooling season and lose it on winter nights.
• Additions. A new bedroom or in-law suite can get its own system instead of stretching existing ducts.
• Older homes without ducts. Pre-1950 houses and mill-village cottages often ran on window units and space heaters. Ductless heads give them real heating and cooling with minimal demolition. Our post on HVAC options for older Columbia homes compares the choices.

A mini-split is also a ductless heat pump, so the same head that cools in July heats in January. For whole-house heat pump work, see our heat pump services.

Ductless jobs we take on, from new heads to tired old ones

Most ductless calls fall into two camps: a room that has never been comfortable, or a head that has started blinking codes, dripping or blowing lukewarm air. We handle both, on most major brands, across Lexington County:

• New single-zone and multi-zone systems, sized room by room and set up through our mini-split installation service.
• Repair of error codes, frozen coils, clogged drains and failed fan motors.
• Deep cleaning of indoor heads, reaching the blower wheel and coil that a filter rinse never touches.
• Leak searches and charge checks on R-410A equipment, and correct handling of newer A2L refrigerants.
• The electrical side: dedicated circuit, outdoor disconnect and the wire between units.
• An honest comparison with extending ducts or zoning, when ductless may not be the right tool.

Head styles and single-zone vs multi-zone systems

One head or several on one outdoor unit

A single-zone system is one outdoor unit and one indoor head. It is the simplest layout and each room is independent. A multi-zone system runs several heads from one outdoor unit, which saves space outside and keeps the exterior tidier. The catch is that every head shares one compressor.

If you are trying to balance temperatures across a whole floor, ducted HVAC zoning is sometimes the better answer, and we will say so.

Sizing a mini-split for a humid Midlands summer

Bigger is not better with ductless equipment. Our summers are as muggy as they are hot, so any system here has to pull moisture out of the air as well as lower the temperature. An oversized head cools the room quickly, then idles before it has run long enough to dry the air, and the room ends up cool and clammy.

We size each head for the room it serves, looking at square footage, ceiling height, window area and direction, insulation, and what sits above (an attic, a hot roof, another floor). Placement matters too. A head mounted where its airflow is blocked by a ceiling fan, a bookshelf or an open door will short-cycle no matter how carefully it was sized.

Condensate needs a route too: gravity drains are simplest, and some layouts need a small pump. Full details are on our mini-split installation page.

How a ductless project moves from idea to first run

1. Room walk. Sun, windows, what sits overhead, and a spot for the outdoor unit clear of paths and gutter outlets.
2. Load and layout. A load for each room, then single-zone or multi-zone, with line-set and drain routes mapped.
3. Free written estimate listing heads, outdoor unit, electrical work, mounting and permit.
4. Install day. Brackets up, wall cored, outdoor unit set, lines, wire and drain run and sealed.
5. Leak and moisture checks. A nitrogen pressure test, then evacuation until the micron gauge holds, before any refrigerant is opened to the lines.
6. Startup. Air temperatures and drainage checked in heat and cool, then a walk-through of the remote and filters.

What shapes the cost of a ductless project?

We don't publish prices because two jobs with the same number of rooms can differ a lot. The biggest swings come from these:

• Number of zones and head style. Cassettes and ducted units take more labor than a wall head.
• Line-set length and route. A short run straight through a wall is quicker than one that climbs two stories or crosses an attic.
• Wall construction. Coring through brick takes more time than vinyl siding over sheathing.
• Electrical work. Most systems need a dedicated circuit and an outdoor disconnect. Panel capacity matters.
• Condensate handling. A pump adds parts and a component to maintain.
• Mounting. A ground pad, a wall bracket, or a stand to clear the ground.
• Efficiency tier and features. Higher-efficiency models cost more up front.
• Permit. New installs usually need a building permit from the town or county.

Ask about financing and any current discounts when you call.

Repairs, refrigerant and care after the install

Ductless systems are reliable when they are kept clean. The washable filters behind the front panel should be rinsed regularly during heavy use, and the blower wheel and coil inside each head need a professional cleaning from time to time. Skipped cleaning is the root of many of the leaks, smells and error codes we see on mini-split repair calls.

Manufacturer warranties vary by brand and often require registration within a set window after install, so keep your paperwork. We serve homeowners from Red Bank to Seven Oaks and the rest of Lexington County.

Licensing, permits and refrigerant law for mini-splits

Refrigerant work falls under EPA Section 608, so only a technician who handles refrigerant legally should open the lines. Under the EPA's AIM Act rule, new residential systems began moving from R-410A to lower-GWP R-32 and R-454B in 2025. Those A2L refrigerants are rated mildly flammable, with added handling rules; existing R-410A mini-splits can still be serviced.

South Carolina licenses residential HVAC contractors through the Residential Builders Commission at SC LLR, whose license search is free. We are fully licensed and insured. A new install usually needs a permit from the Town of Lexington or Lexington County, depending on whether the address sits inside town limits.

Why call Puzzled Comfort Solutions about a mini-split?

Ductless projects are won or lost at the design stage, which is where our Google reviews (5.0 from 29, October 2026) keep landing: pros and cons laid out, no push toward a bigger multi-zone package, and the homeowner deciding.

Owner and HVAC technician Chong Kim has run the company since its South Carolina registration in April 2021. We are NATE certified, with over 10 years of HVAC experience. Estimates are free and financing is available, with published discounts of 10% for public school system employees, 15% for veterans, first responders, law enforcement and health care workers, and 20% for families with a special-needs family member at home.