Garage or workshop
Dedicated comfort sized for insulation, doors, sun, ceiling height, equipment heat, and how the space is actually used.
Owner-led HVAC serviceSan Antonio, TexasTACLB00102161E
Ductless mini-splits · San Antonio
Comfort designed forthe actual space.
Mini-splits can be an excellent fit for a garage, casita, addition, office, or isolated hot room. Arthur sizes the real load and plans the placement, drainage, electrical, and installation scope before recommending equipment.
Load before equipmentComplete installed scopeEnglish / Español
Single-zone installationFrom $4,250
Competitive starting point · complete scope confirmed on site
TACLB00102161E25+ years in HVACOwner-led planningClear scope before work
Where ductless fits
Give one difficult space its own comfort plan.
The right application is usually physically or thermally separate from the main home. The wrong application asks one head to solve several closed rooms or conceal a correctable building problem.
Casita or guest space
Independent heating and cooling without a long duct extension from the main house.
Addition or office
A practical option when the original central system and duct design were never built for the new room.
Hot room or bonus room
Considered only after duct, return-air, insulation, and room-load problems have been separated.
Older home without ducts
Room-by-room comfort without forcing a conventional attic or floor duct network into the structure.
Multi-zone layout
Several independently controlled areas designed around each room load and the outdoor unit's operating range.
Six design decisions
The indoor unit is only one piece of the installation.
Comfort, reliability, and serviceability depend on decisions that should be visible in the proposal before a hole is made in the wall.
The real room load
Dimensions, glass, orientation, insulation, air leakage, people, equipment, and existing HVAC contribution.
Air distribution
Indoor-unit location, throw, furniture, doors, drafts, and whether one head can truly serve the intended area.
Drainage
A reliable gravity drain when possible, or an accessible condensate pump when the route requires one.
Refrigerant path
Line length, vertical separation, insulation, UV protection, wall penetration, and service access.
Electrical capacity
Dedicated circuit, disconnect, conductor and breaker requirements, panel capacity, and permitted electrical scope.
Outdoor placement
Clearances, stable mounting, sound, vibration, drainage, impact protection, appearance, and future service.
Single-zone or multi-zone
More zones do not automatically mean a better design.
One outdoor unit can serve several indoor heads, but minimum capacity, simultaneous operation, connected combinations, line length, controls, and the effect of one shared failure all matter. Separate single-zone systems may be the stronger choice.
- Single-zone: direct match for one garage, casita, office, suite, or open room.
- Multi-zone: fewer outdoor units with several independently controlled indoor areas.
- Compact-ducted: short ducts can serve nearby small rooms when wall heads are not a good fit.
- Cassette or floor unit: useful when wall placement, appearance, or throw requires another form.
Planning prices
Competitive numbers with the major assumptions visible.
These July 2026 planning figures are not guaranteed quotes. Arthur confirms capacity, equipment, line length, drainage, electrical work, mounting, permits, access, and exclusions before presenting the final price.
Mini-split installation evaluation
No-cost
For qualified installation projects
- Best for
- Garage, casita, addition, office, isolated room, or multi-zone planning
- Scope
- Application review, placement plan, major scope decisions, and a written installation proposal
Single-zone installation
From $4,250
Competitive complete-install starting point
- Best for
- One independently conditioned room or open area
- Scope
- Matched heat-pump equipment and standard installation scope; final price follows load, access, electrical, and drain review
Multi-zone installation
$7,000-$15,000+
Planning range; project-specific proposal
- Best for
- Two or more independently controlled spaces
- Scope
- Zone-by-zone design, matched combinations, drainage, controls, refrigerant routing, electrical scope, and startup
Mini-split repair diagnosis
$149
Repair priced after diagnosis
- Best for
- Cooling, heating, drainage, noise, control, communication, or refrigerant problems
- Scope
- Indoor head, outdoor unit, controls, drain, electrical supply, refrigerant circuit, and installation review
Mini-split maintenance
From $175
One indoor head and one outdoor unit
- Best for
- Existing ductless equipment that needs routine inspection and normal cleaning
- Scope
- Filter, coil, blower, drain, controls, temperatures, outdoor unit, and condition report; deep cleaning is separate
Additional indoor head
$75 each
During the same maintenance visit
- Best for
- Multi-zone systems with more than one indoor unit
- Scope
- Routine inspection and normal maintenance scope for each accessible additional head
Market basis reviewed July 2026. Public San Antonio references commonly place single-zone professional installation around $3,500-$6,000, premium or complex single-zone projects up to roughly $8,300, and multi-zone work around $7,000-$15,000 or more.
Complete installation
The finish outside should be as deliberate as the comfort inside.
Equipment placement, stable mounting, line-hide, disconnect, drainage, wall sealing, and service access are part of the visible quality of a mini-split project.
Arthur's process
Plan the whole project before selecting the box.
A strong mini-split installation starts with the problem and the space, then works outward through capacity, placement, routes, scope, installation, and commissioning.
Understand the space
Arthur documents the room use, comfort goal, schedule, existing HVAC, and the problem you are trying to solve.
Calculate, do not guess
Capacity is selected from the actual heating and cooling load, not square footage or an online equipment label alone.
Plan every route
Indoor placement, outdoor placement, refrigerant lines, drainage, electrical work, and service access are resolved before work begins.
Define the full scope
The proposal names the equipment, included line length, mounting, electrical assumptions, permit responsibility, warranty, and exclusions.
Install and verify
Piping, pressure testing, evacuation, drainage, electrical, controls, and startup follow the approved equipment requirements.
Explain the system
You receive operating guidance, maintenance expectations, warranty information, and a clear record of the completed work.
Scope checklist
Know what “installed” includes.
Online equipment price is not the installed project. Every Air Valentine proposal should make the major inclusions, assumptions, allowances, and exclusions easy to compare.
✓
Matched indoor and outdoor equipment with model numbers
✓
Documented room or zone served
✓
Approved indoor-unit and outdoor-unit locations
✓
Standard equipment mounting and vibration control
✓
Refrigerant tubing, control wiring, and insulation
✓
Sealed wall penetration and exterior line-hide
✓
Gravity drain or clearly identified condensate-pump scope
✓
Dedicated circuit, disconnect, and electrical assumptions
✓
Nitrogen pressure test and manufacturer-required evacuation
✓
Startup, temperature checks, controls, and homeowner orientation
✓
Permit responsibility and inspection requirements
✓
Warranty registration, labor coverage, exclusions, and total price
Repair and maintenance
Every head is its own coil, blower, filter, drain, and control.
Mini-split service is not one generic central-system tune-up. Air Valentine prices routine care by the actual head and outdoor-unit count, and separates ordinary maintenance from deep cleaning, drainage repair, refrigerant work, and parts replacement.
Request mini-split serviceAir Valentine answers
Should I put a mini-split in my garage, casita, or hot room?
Learn when ductless is a strong fit, what to correct first, why one head does not serve every closed room, and which installation details change the price.
Read the mini-split planning guide
Mini-split FAQ
Straight answers before the proposal.
How much does a mini-split cost in San Antonio?
A straightforward professionally installed single-zone project often plans around $3,500-$6,000 in the current San Antonio market. Air Valentine's competitive complete-install starting point is $4,250. Premium or complex single-zone work can reach roughly $8,300, while multi-zone systems commonly plan around $7,000-$15,000 or more.
Can one mini-split cool several rooms?
It can serve an open connected area, but one wall head cannot reliably push air through several closed rooms. Layout, doors, individual room loads, and the selected indoor-unit type determine coverage.
Can a mini-split cool an uninsulated garage?
It may run without delivering good comfort or operating cost. Garage-door construction, roof and wall heat, leakage, ceiling height, tools, vehicles, and usage must be evaluated before selecting equipment.
Is a multi-zone system always the better value?
No. One multi-zone outdoor unit reduces equipment count, but separate single-zone systems can provide better capacity matching, redundancy, and part-load operation. Arthur compares the practical layouts before recommending one.
Why is my mini-split leaking water?
Common causes include a blocked or poorly sloped drain, failed condensate pump, dirty coil, icing, damaged pan, disconnected tubing, or an installation problem. Turn it off when leakage threatens finishes or electrical components.
Does Air Valentine service existing mini-splits?
Yes. The $149 diagnostic starts with the indoor head, outdoor unit, controls, drainage, electrical supply, refrigerant circuit, and original installation. Parts availability and warranty status are confirmed before a repair is proposed.
How often does a mini-split need maintenance?
Filter attention depends on use, pets, dust, smoke, and manufacturer guidance. A professional visit should account for every indoor head, its coil, blower, drain, and controls, plus each outdoor unit. Heavy buildup requires a separate deep-cleaning scope.
Start with the space
Choose the load, location, and complete scope before the equipment.
Tell Arthur what room you want to condition, how it is used, and what feels wrong. He will determine whether ductless is the right answer and build the proposal from the actual conditions.