Ductless AC Installation
Ductless AC installation for the rooms your ducted system was never designed to cool.
Call Now: (602) 905-4528Almost every Valley home has one room that loses the fight in July: the converted garage, the Arizona room, the casita, the west-facing office, the bonus room over the garage. Adding a register to a duct system that is already at its airflow limit does not fix those rooms — it just steals air from somewhere else. Ductless is how you actually solve them.
A ductless mini-split puts an outdoor condenser and one or more indoor heads on a small refrigerant line set through the wall, with no ductwork at all. That matters enormously here, because duct losses in a 140°F Phoenix attic are one of the largest energy penalties in Arizona housing. Air that never travels through the attic cannot lose capacity there.
Fast Track Heating and Cooling installs single-zone and multi-zone ductless systems across the Phoenix Metro. The business is family-run from Mesa and is licensed and insured (AZ ROC #355929). Call (602) 905-4528 for a free assessment of the space.
What's Included
Where ductless is the right answer
Garage conversions and casitas top the list, because they usually have no duct branch at all and running one is expensive and inefficient. Additions and Arizona room enclosures come next — the existing system was sized for the original footprint, and asking it to cover 400 more square feet under a low-insulated roof rarely ends well.
Then the comfort cases: a west-facing home office that runs 8° warmer than the thermostat's hallway, a bonus room over a garage, a primary bedroom at the far end of a long duct run, or a workshop and garage gym that need cooling on a schedule nobody else in the house shares. Ductless gives that space its own thermostat and its own compressor capacity.
How the equipment works
Inverter-driven compressors modulate output continuously rather than cycling on and off, which is why a mini-split holds a room within a degree of setpoint and does it quietly. Indoor units run in the mid-20s to low-40s decibel range on low fan — quieter than most refrigerators — and the compressor is outside.
Every ductless system is also a heat pump, so the same equipment heats the space in the winter with no gas line and no separate appliance. In a Valley climate that pairing is ideal: heavy cooling duty, light heating duty, and no need for a furnace in an add-on space. Indoor units come as high wall, ceiling cassette, floor-mount, and slim ducted concealed heads depending on what the room allows.
What installation involves
Sizing per zone first, based on the room's exposure, glazing, insulation, and use — not a rule of thumb. Oversizing a mini-split is the classic error and produces a unit that overshoots, short cycles, and never dehumidifies during monsoon weeks.
Then the work itself: mounting bracket and indoor head placement for good throw and serviceability, a three-inch wall penetration for the line set, refrigerant lines brazed and pressure-tested, a proper vacuum pull to remove moisture and non-condensables, condensate drainage routed with real slope, a dedicated electrical circuit and disconnect, and an outdoor pad or wall bracket. We commission with pressures, temperature split, and amp draw recorded, and we pull the permit.
Ductless vs. mini split vs. extending your ducted system
This page covers ductless as a cooling solution for a specific space — when it wins and what the project involves.
The mini split installation page goes deeper on multi-zone configurations, head styles, and zone-by-zone control for whole-home or multi-room applications.
Extending the existing ducted system is occasionally the better answer, but only when a ductwork assessment shows the system has the capacity and airflow headroom to serve more square footage.
What ductless installation costs
Ductless pricing is driven by zone count, head type, line set length, and electrical work. We quote after seeing the space because wall access and condenser placement change the number materially.
| Job | Typical range |
|---|---|
| In-home assessment and per-zone sizingIncludes electrical review and condenser placement options. | Free |
| Single-zone installationHead type, line set run, and electrical drive the price. | Quoted after inspection |
| Multi-zone installation (2–5 heads)One condenser serving multiple rooms, each with its own thermostat. | Quoted after inspection |
| Permit and commissioningPressure test, vacuum, recorded startup readings, and code inspection. | Included |
Financing is available. For context, a whole-home ducted replacement in the Valley typically runs $5,800 to $12,000 — a single-zone ductless project is a much smaller scope than that.
Ductless installation mistakes
Oversizing the zone
A too-large head overshoots setpoint, short cycles, and leaves the room clammy in monsoon humidity. Inverter equipment rewards correct sizing more than conventional AC does.
Skipping the vacuum
Moisture and air left in the lines create acid and non-condensable pressure that shorten compressor life. A proper evacuation is not optional and takes real time.
Bad condensate routing
A drain line without continuous slope backs up into the head and drips down an interior wall. This is the most common ductless callback in the industry.
Head placed for looks instead of airflow
Mounted over a doorway or blowing into a soffit, the unit satisfies its own sensor and leaves the room uneven. Placement is an engineering decision.
How It Works
Schedule
Call or book online — we'll find a time that works for you.
Diagnose
Our certified technicians assess your system and explain the issue.
Approve
We provide an upfront quote so you know exactly what to expect.
Complete
We get the job done right the first time, guaranteed.
Serving the Entire Phoenix Metro
Ductless makes unusually good sense in Arizona because our duct losses are unusually bad. Ducts running through an attic at 130° to 150° all summer lose capacity through both leakage and conduction, and studies of hot-climate housing consistently find that a substantial fraction of cooling delivered into the attic never reaches a register. A mini-split has no attic exposure at all.
Valley housing gives ductless plenty of work. Garage conversions and casitas are everywhere in Mesa, Tempe, and Phoenix; enclosed Arizona rooms are common in older Sun City, Apache Junction, and central Mesa neighborhoods; and newer Gilbert and Queen Creek homes often have a bonus room over the garage that the main system simply cannot hold.
We install ductless systems throughout Mesa, Gilbert, Chandler, Tempe, Queen Creek, San Tan Valley, Apache Junction, Scottsdale, Paradise Valley, Fountain Hills, Ahwatukee, Phoenix, Glendale, Peoria, and Surprise.
Why Choose Fast Track?
Licensed & Insured
Fully licensed, bonded, and insured for your peace of mind.
Fast Response
Same-day service available with rapid response times across the Valley.
Quality Guaranteed
100% satisfaction guarantee on all work we perform.
Transparent Pricing
Upfront quotes with no hidden fees or surprise charges.
What Our Customers Say
Real reviews from real Phoenix Metro homeowners.
"Matthew was recommended by a family friend and he and Seth came out a couple of days later. They were very thorough and explained what repairs my system needed after checking every component. Matthew did not recommend blindly replacing parts that were still in spec. I was very happy with the service and would definitely recommend Fast Track."
— Dirk Witter
"The best there is. They have saved me from melting in the heat multiple times even at 6am on a Sunday morning. They show up so quickly when my air conditioning stops working in the summer."
— Jessica Mattison
"I had a great experience with FTHC. Matthew and Seth were prompt, professional and quickly resolved the issue with my HVAC system. They explained everything clearly and provided an affordable and honest price."
— Buck Shumway
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