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Polar Express HVAC & Refrigeration

Air Conditioning

Ductless comfort for the rooms the ducts never reached.

Polar Express installs and repairs residential mini-splits across the San Antonio metro, with 24/7 emergency dispatch and same-day service on most repair calls. One flat-rate price is approved in writing before work begins for single-zone or multi-zone installs, line sets, indoor heads, and drainage. TDLR license TACLA00127982C.

An addition, a converted garage, a casita out back, or a 1920s house with plaster walls and nowhere to run a trunk line. All four have the same answer.

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  • Licensed TACLA00127982C
  • Since 2023
  • 4.9 Google rating

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There is a particular kind of San Antonio room that central air never solved. The enclosed patio somebody turned into a den. The garage that became a workshop and hits triple digits by noon. The casita or guest suite over the driveway. And whole neighborhoods of genuinely old housing, the Monte Vista and Alamo Heights stock built long before central air conditioning existed, where running new trunk lines means opening plaster walls nobody wants opened. A ductless mini-split conditions those spaces without a duct system at all: one small outdoor unit, a three-inch penetration through the wall, and an indoor head serving that zone alone. Polar Express designs, installs, and services single-zone and multi-zone ductless equipment across the metro, on systems we put in and systems we did not.

What we handle

Ductless Mini-Splits covers more than one failure.

The complaint that gets called in is rarely the whole job. These are the things a technician is actually looking at on this equipment.

  • Additions, conversions, and casitas

    Rooms the original system was never sized to carry, spaces added years later, and guest quarters that need their own control rather than stealing air from the main house.

  • Garages, shops, and studios

    An uninsulated Texas garage is its own climate. Sizing one honestly means accounting for the door, the roof, and whatever heat the equipment working inside it throws off.

  • Older homes without ductwork

    Houses built before central air was standard, where the real choice is between cutting into finished walls and hanging a system that never needed them.

  • Zoning and multi-zone design

    One outdoor unit serving several heads, with the load worked out room by room so no single zone ends up oversized, short cycling, and damp.

  • Mini-split repair and service

    Error codes, failed inverter boards, condensate pump failures, and blocked drain lines. Ductless equipment fails differently from central equipment, and it gets diagnosed differently.

  • Line sets, condensate, and mounting

    Where the line set runs, how it is covered, how condensate leaves the room, and how the outdoor unit is mounted. Installation quality decides most of how long one of these lasts.

Signs and causes

What you are seeing, and what usually causes it.

Read these before you call. Knowing which one matches gets the right parts on the truck, and a couple of them are worth acting on in the next ten minutes.

  • One room is always ten degrees off

    A single room the central system cannot satisfy is rarely fixed by making the central system larger. A dedicated head solves that room directly and stops the rest of the house from being over-cooled to compensate for it.

  • The room was added after the house was built

    Additions usually get tied into whatever duct ran closest, which borrows capacity the original design had already spent. Ductless gives the new space its own equipment, its own thermostat, and sizing that belongs to it.

  • There is no ductwork and nowhere sensible to put it

    In an older home the real cost of central air is not the equipment, it is the chases, soffits, and closets you have to build to carry the air. Where there is nowhere to put those, ductless stops being a compromise and becomes the better design.

  • The garage or shop is unusable half the year

    Attached and detached garages routinely run well above the outdoor temperature behind a west-facing door. A properly sized head makes the space usable, and the same equipment will warm it through the handful of cold weeks Texas gets.

  • Somebody in the house wants a different temperature

    Zoning is the quiet reason a lot of people end up here. A guest room, a nursery, or a home office running on its own setpoint settles an argument that no single central system was ever going to resolve.

What it costs

You approve the price before the work starts.

Ductless pricing turns on the number of zones far more than on anything else, so the estimate starts with a walk through the spaces you want conditioned. We size each zone, work out where the outdoor unit can live, plan how the line set and the condensate will be routed, and hand you a written quote covering equipment, mounting, electrical, and startup. Multi-zone systems are not single-zone prices multiplied, and one head asked to do too much work is a worse outcome than two heads doing it properly. We do offer financing on installations, and the person doing your estimate can explain how it works.

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What moves the number

  • How many indoor heads the design calls for, and the capacity each zone needs
  • Single-zone equipment versus a multi-zone system sharing one outdoor unit
  • Indoor head style, from a wall cassette to a ceiling cassette or a floor console
  • Line set length and routing, including whether any of it can be concealed
  • How condensate leaves each room, and whether a pump is required to move it
  • Electrical work, since most systems want a dedicated circuit at the outdoor unit

How the job runs

What happens between your call and a working system.

  1. Step 1

    Walk the space and size the zone

    Windows, insulation, ceiling height, sun exposure, and what the room gets used for. An oversized head short cycles, leaves the room damp, and gives up the part-load efficiency that made the equipment worth buying.

  2. Step 2

    Decide where everything goes before install day

    Head placement, outdoor unit location, line set path, and drain route all get agreed while it is still a drawing. Those four choices are the ones people either forget entirely or look at every day for fifteen years.

  3. Step 3

    Install, evacuate, and commission

    Proper mounting, a deep vacuum pulled on the line set before charging, flare connections verified, and the system started up and tested at every head rather than only the one nearest the door.

  4. Step 4

    Show you how to run it

    Ductless equipment rewards a steady setpoint over hard cycling, and the filters behind each head need rinsing far more often than a central filter needs changing. Five minutes at handoff saves the first service call.

Questions

Straight answers, before you call.

Still not covered here? The person who answers the phone can usually settle it in a sentence, day or night.

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Yes, provided it is sized for what a garage actually is rather than for its square footage. An uninsulated garage with a large metal door facing the afternoon sun gains far more heat than a bedroom of identical size, so the load calculation has to account for the door, the roof, and any equipment running inside. Insulating that door first usually lets you buy smaller equipment and still get a better result.

They are frequently the best fit available. Houses in neighborhoods like Monte Vista and Alamo Heights were built before central air conditioning was standard, so there are no duct chases, and adding them means cutting into plaster, dropping ceilings, or surrendering closet space. Ductless needs one small penetration per zone, which is why it tends to win on cost and on preserving the house at the same time.

One per space you want to control independently, and the honest count comes from walking the house rather than reading a floor plan. Open areas can sometimes share a single larger head, while rooms behind doors almost always need their own. Under-counting the zones is the most common regret, because no head is large enough to push conditioned air past a closed door.

Nearly all of them do, and in this climate that matters more than people expect. Ductless systems are heat pumps, so the same equipment reverses in winter and covers the short Texas cold snaps without a separate heater in the room. Output does fall as the outdoor temperature drops, but San Antonio rarely spends long enough down there for it to be the deciding factor.

Less than a ducted system in some respects, and more attention in one specific one. The washable filters behind each indoor head want rinsing roughly monthly, and the blower wheel inside the head needs a proper cleaning periodically. Skipping the filters is what produces the musty smell people usually blame on the equipment itself. The outdoor unit gets the same annual service any condenser does.

Polar Express gives one written flat-rate price for ductless mini-split work in San Antonio, approved before installation or repair begins. Installation cost depends on the number and capacity of indoor heads, line-set routing, and the electrical or condensate work required. Repair cost depends on the failed control, fan, drain, or refrigeration component.

Polar Express handles all major ductless mini-split brands across San Antonio, including single-zone and multi-zone systems with wall, ceiling, or floor-mounted indoor units. Technicians service systems installed by Polar Express and equipment inherited from another contractor. Compatibility, available parts, and correct controls are verified before a repair or replacement is approved.

Related services

The work that usually comes with this one.

Nearby

We run this service across the San Antonio metro. These are three of the areas we cover, and the full list lives on the service areas page.

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Licensed, locally owned, and answering the phone around the clock. You get the diagnosis in plain language and the price before the work starts.

Call 24/7 · (210) 376-0781Book Service