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AfterTrusted Ductless Mini Split Installation Nationwide
A room that never matches the rest of the house, an addition with no ductwork, a garage or sunroom nobody can use in July: these are the problems a ductless mini split solves, and they are the reason homeowners call Coldharbour Heating & Air. Since 2003, we have installed ductless systems in homes across the country, and every installation carries the 365-Day Done Right Promise, a written guarantee that if the work fails within a full year, we come back and fix it at no charge. A live person answers our phones 24 hours a day, seven days a week, so you can book a site visit without waiting for a callback. Call (817) 402-2972 and you will talk to someone who can put a technician on your calendar right then. A single-zone ductless installation typically runs $3,000 to $6,500, and you will have a written price before any work begins. No surprise add-ons, no door-day markups.
Key Takeaways
- Ductless mini split installation typically costs $3,000 to $6,500 for one zone and $6,000 to $14,000 for multi-zone systems, depending on the number of indoor heads and the line-set run.
- No ductwork is needed. Each indoor unit connects to the outdoor unit through a small conduit, usually a three-inch hole in the wall.
- One system heats and cools. Most modern mini splits are heat pumps, so you get both seasons from the same equipment.
- Every installation comes with the 365-Day Done Right Promise in writing, not a verbal assurance.
- You get a written price before work starts, and that number does not change at the door.
What Is a Ductless Mini Split?
A ductless mini split is a heating and cooling system made of two parts: an outdoor unit that holds the compressor and condenser, and one or more indoor units mounted on a wall, a ceiling, or recessed into it. A thin bundle of copper refrigerant lines, a power cable, and a condensate drain connect the two. Because the system moves refrigerant instead of air through ducts, there is no duct loss, and each indoor unit has its own thermostat. That means the bedroom can sit at 68 degrees while the home office sits at 72, and you only pay to condition the rooms you are using. Coldharbour Heating & Air installs single-zone systems for one problem room and multi-zone systems that serve four, five, or more rooms from one outdoor unit.
Where mini splits make the most sense
They are the right answer for room additions, converted garages, finished basements, sunrooms, older homes with no ductwork, and homes where the existing ducts are undersized or leaking. They also work well as a supplement in a house with one stubborn hot or cold room. If your home already has healthy ductwork and a central system, a conventional replacement may be the better value, and we will tell you that honestly. Our heat pump installation service covers ducted whole-home options.
Single-Zone Mini Split Installation
Single-zone installation pairs one outdoor unit with one indoor head, and it is the most common job we do. You need it when one space is the problem: a bonus room over the garage, a converted attic, a workshop, or a bedroom that runs ten degrees off from the rest of the home. A single-zone installation usually takes one day. Our technicians mount the indoor unit, drill the line-set penetration, set the outdoor unit on a pad or wall bracket, run and insulate the refrigerant lines, pull a vacuum on the system, and commission it. Pricing typically falls between $3,000 and $6,500 depending on the capacity you need, the distance between the two units, and the electrical work required.
Sizing the unit to the room
Bigger is not better. An oversized mini split cools the room fast, shuts off, and never removes humidity, which leaves the air clammy. An undersized one runs flat out and still falls short on the hottest and coldest days. We size every system from the room’s square footage, ceiling height, window area, insulation, and sun exposure, not from a rule of thumb printed on the box.
Line-set routing and mounting
The cleanest installations hide the line set inside a color-matched cover or run it through an attic or crawl space. We plan the route on the site visit and show you exactly where the indoor head, the wall penetration, and the outdoor unit will go before we start. If the outdoor unit needs a pad, a wall bracket, or a snow stand, that appears on the written estimate.
Multi-Zone Ductless Systems
A multi-zone system connects up to eight indoor units to one outdoor condenser, which means one outdoor footprint and one electrical connection serve the whole house. It is the common choice for homes with no ducts at all, whole-house additions, and accessory dwelling units. Each head can be a different style: a wall-mounted unit in the living room, a slim ceiling cassette in the kitchen, a low-profile console under a window. Multi-zone projects typically run $6,000 to $14,000 depending on how many zones you need, the capacity of the outdoor unit, and the complexity of the line-set runs. Because these jobs involve several rooms, we always walk the whole property before writing a price, and the estimate lists every indoor unit by location.
Matching heads to rooms
Not every room needs the same capacity. A small bedroom may need 9,000 BTU while an open living area needs 18,000 or more. The outdoor unit has to be sized for the combined load and the way you actually use the home, since it will rarely run every zone at full output at once. We calculate both numbers so the system is neither starved nor oversized.
Electrical and condensate considerations
Every indoor unit makes condensate that has to drain properly, either by gravity to the exterior or through a small pump. We design the drain path before mounting anything, and we confirm your panel has the capacity and the breaker space for the outdoor unit. If an electrical upgrade is needed, it is listed in writing before the work begins.
Heating and Cooling From One System
Almost every mini split we install is a heat pump, which means it cools in summer and heats in winter using the same equipment. Modern inverter-driven units adjust compressor speed continuously instead of cycling fully on and off, and that is where the efficiency comes from. Cold-climate models keep delivering heat well below freezing, and many are rated to keep running at temperatures in the negative single digits. If you are planning to move away from electric baseboard, a window unit, or an aging propane heater, a ductless system can cut your heating bill substantially. We will tell you which model fits your climate and what to expect from it. For homes that want a backup, our furnace installation team can pair a mini split with a gas or electric furnace.
Ductless vs. Ducted: How to Decide
Ductless wins when ductwork would be expensive or impossible to add, when you want room-by-room control, or when the existing ducts leak enough air to waste a large share of what the system produces. Ducted wins when the home already has well-sealed ducts and you want a hidden, whole-home system with no visible indoor units. Neither is right for every house. Our technicians have installed both, and the site visit includes a plain comparison of cost, comfort, and operating expense for your home specifically. We do not push the option that pays us more.
Cost comparison in plain numbers
Adding new ductwork to a house that has none often costs more than a multi-zone mini split by the time you account for opening walls, running trunk lines, and patching. On the other hand, replacing a central system that has good ducts is usually cheaper than converting to ductless. We put both numbers in writing when it is a close call.
Comfort and noise
Indoor heads run very quietly, often in the low-to-mid 20s of decibels on the lowest fan setting. With no ducts, there is no whistle or rattle, and no stale air pulling dust from a dirty duct run. Some homeowners also like that each head has its own filter that you can pull out and rinse yourself.
Brands We Install
We install ductless systems from the manufacturers with the strongest parts availability and service networks. Our technicians work with Mitsubishi, Daikin, Carrier, Trane, Lennox, Goodman, Rheem, York, and Bryant, and we will recommend the line that fits your climate, your budget, and the number of zones you need. Warranty terms vary by manufacturer, and we register the equipment for you so your factory coverage starts on day one. Our own 365-Day Done Right Promise covers the installation workmanship on top of whatever the manufacturer covers on the equipment.
Signs a Ductless System Is Right for You
- One room is always too hot or too cold. That usually points to a duct that is too long, too small, or leaking. A single-zone mini split fixes the room without touching the rest of the system.
- You are finishing a basement, garage, attic, or addition. Extending ductwork is costly and often cuts into already tight ceiling space. A ductless head needs only a small wall opening.
- Your home has no ducts at all. Older homes with radiators, baseboard heat, or window units are strong candidates for a multi-zone system.
- Your energy bills keep climbing. Leaky ducts in an attic or crawl space can waste a large share of conditioned air. Removing the ducts from the equation removes that loss.
- Different people want different temperatures. Individual zone control ends the thermostat arguments and stops you paying to condition empty rooms.
Our Installation Process, Step by Step
- 1
You call and a live person answers. We ask which rooms you want to condition, what you have now, and what is not working. You get a firm site-visit window before the call ends.
- 2
We survey the property. A background-checked, uniformed technician measures the rooms, checks window area and insulation, inspects your electrical panel, and picks the mounting and outdoor-unit locations with you.
- 3
You get a written price before we turn a wrench. The estimate lists each indoor unit, the outdoor unit, the line-set length, electrical work, and any pad or bracket. That number is fixed. If something unexpected comes up, we stop, explain, and give you a new written price before continuing.
- 4
We install the system. We mount the equipment, run and insulate the lines, connect power and drain, pull a vacuum to remove moisture, and release the factory charge. We protect your floors and walls throughout.
- 5
We commission it, clean up, and hand you the guarantee. We test heating and cooling in every zone, confirm temperature drop and drainage, and show you how the remote and filters work. Then we hand you the 365-Day Done Right Promise in writing before we leave.
How Much Does Ductless Mini Split Installation Cost?
A single-zone ductless installation typically runs $3,000 to $6,500, parts and labor included. A two-zone system usually lands between $5,000 and $9,000, and larger multi-zone systems serving four or more rooms commonly fall between $9,000 and $14,000. Higher-efficiency and cold-climate models sit toward the top of each range. Long line-set runs, concrete or masonry wall penetrations, panel upgrades, and ceiling cassette installs add to the total, and each is listed on your written estimate.
Several factors move the price. Capacity matters, since a larger BTU rating costs more. The brand and efficiency tier matter. So does the difficulty of the install: a one-story ranch with an outside wall behind the room is simpler than a third-floor bedroom that needs a long, concealed line-set route. Some utilities and local programs also offer rebates on high-efficiency heat pumps, and we will point out the ones we know of. The best way to avoid overpaying is to work with a company that puts the price in writing before work starts and guarantees the job in writing after it is done. The estimate is free. Call (817) 402-2972 and we will schedule a visit, walk the property, and give you a fixed price.
Maintenance After Installation
A mini split is low-maintenance, but not no-maintenance. The indoor filters should be rinsed every month or two, and the coil and drain pan should be cleaned once a year to prevent musty odors and clogged drains. The outdoor unit needs clear space around it and should be kept free of leaves, snow, and debris. We offer annual service through our AC maintenance plans, which cover ductless systems as well, and if something stops working we can help with heating repair and cooling diagnostics. Keeping up with this simple routine protects the compressor and keeps the efficiency you paid for.
Where We Work
Coldharbour Heating & Air serves homeowners across the United States through local crews working to the same written standards. Whether you are in a suburb, a mid-size city, or a rural community, the same rules apply wherever our trucks roll: a price before the work starts, a firm arrival window, a clean job site, and a written 365-day guarantee on every installation. We have been doing this since 2003. You can also return to our home page to see everything we do.
Frequently Asked Questions About Ductless Mini Split Installation
A single-zone installation typically costs $3,000 to $6,500, and multi-zone systems run $6,000 to $14,000 depending on the number of indoor units, capacity, and line-set length. Every job includes a written price before work begins and a written 365-Day Done Right Promise after it is complete. Call (817) 402-2972 for a free estimate.
A single-zone system is usually installed in one day, often in four to eight hours. Multi-zone systems take one to three days depending on the number of heads and how complicated the line-set routing is. We give you a time estimate with your written price.
Yes. Most mini splits are heat pumps that both heat and cool. Cold-climate models keep producing useful heat at temperatures well below freezing. We will recommend a model rated for your region and tell you whether you should keep a backup heat source.
It depends on how many rooms you want to control separately. One head can cover a large open space, while closed-off bedrooms usually need their own. We walk the property, calculate the load for each room, and list every indoor unit by location on the written estimate.
Every installation includes the 365-Day Done Right Promise, a written guarantee valid for a full year from the date of service. If the installation work fails during that window, we return and correct it at no additional charge. The equipment also carries the manufacturer’s warranty, which we register for you.
Clear the wall or ceiling area where the indoor unit will mount, and move vehicles, patio furniture, or garden items away from the outdoor unit location. Secure pets before the crew arrives. Nothing else is required, and we cover floors and clean up when we are done.
Schedule Your Ductless Mini Split Installation Today
If you are ready to fix a problem room or heat and cool a new space without ductwork, call (817) 402-2972 now and a live person will answer, day or night. We will schedule a site visit, size the system, and hand you a written price before any work begins. Every installation includes the 365-Day Done Right Promise in writing. Homeowners across the country rely on Coldharbour Heating & Air because they have been let down by another company before. We put it in writing, every time.
Written by Victor Mancini, Owner at Coldharbour Heating & Air, serving customers across the United States since 2003.