--- title: "Mini-Splits in Middle TN | Free Diagnostic Visit | Root House" url: https://roothousemechanicals.com/hvac/ductless-mini-splits updated: 2026-09-29 business: "Root House Mechanicals" phone: "(615) 426-9344" text: "(615) 426-9344" email: info@roothousemechanicals.com hours: "Monday to Friday, 8 a.m. to 5 p.m." --- # Ductless Mini-Splits in Middle Tennessee > Root House Mechanicals installs and repairs ductless mini-splits across Middle Tennessee for additions, garages, bonus rooms, sunrooms and older homes without ducts. A mini-split heats and cools a space without ductwork. The visit to look is free, with a firm price before work starts. Call or text (615) 426-9344, Monday to Friday, 8 a.m. to 5 p.m. - Call (615) 426-9344 (Monday to Friday, 8 a.m. to 5 p.m.) - Text (615) 426-9344 - Email: info@roothousemechanicals.com A room that's always too hot or too cold, an addition the old system can't reach, a garage you want to work in year-round: those are the jobs a ductless mini-split was made for. It heats and cools one space, or several, without running ductwork. We install new mini-splits in renovations, additions and new homes, and we repair existing ones. Mini-split work is done by licensed and insured techs. One call still covers the whole job, including the electrical and finish work. ## Signs you need mini-splits help - A room the central system never keeps comfortable, often the one over the garage - An addition, sunroom or finished basement the existing ducts don't reach - A garage, workshop or studio you want to heat and cool - An older home with no ductwork, getting by on window units or baseboard heaters - A mini-split that blinks an error code or stops heating or cooling - Water dripping from an indoor head, or ice on the lines outside - An indoor head that smells musty when it starts ## What we do - **Single-zone mini-splits.** One outdoor unit and one indoor head for a single room or open space. - **Multi-zone systems.** One outdoor unit serving two or more indoor heads, each with its own control, so every room is set on its own. - **Indoor head options.** Wall-mounted heads, ceiling cassettes that sit flush in the ceiling, and floor consoles for rooms with low walls or lots of windows. - **Line sets, drains and power.** Routing the refrigerant lines and condensate drain neatly, and running the dedicated circuit the outdoor unit needs. - **Mini-split repair and cleaning.** Error codes, drain problems, refrigerant leaks, sensors and fan motors, plus deep cleaning of the indoor coil and blower wheel when they are dirty or musty. - **New construction and renovations.** Mini-split rough-in and trim-out for additions, remodels and new homes, planned with the framing, electrical and finish work so the lines and drains end up where they belong. ## Repair or replace? Many mini-split problems are a clogged drain, a dirty coil, a failed sensor or a bad fan motor. Those are repairs, and we'll tell you so. Replacement makes more sense when the compressor fails on an older system, when a refrigerant leak keeps coming back, or when parts for the model are no longer available. On a multi-zone system, we'll find out whether one head or the whole system is the problem before you decide. You'll get a firm price for each option. ## What it costs, and how we price it What drives the price: - The number of rooms (zones) and the size of each - Single-zone or multi-zone, and the type of indoor head - How far the lines run between the outdoor unit and each head, and what they pass through - Whether a new electrical circuit is needed, and whether the panel has room for it - Where the outdoor unit sits: on a pad, a wall bracket or a stand - Efficiency ratings and how well the system heats in cold weather - The diagnostic visit: free. - Firm price given before any work starts. - Priced per job. Each job is priced on its own. - Why prices stay down: low overhead, and the work done right the first time with current methods, equipment and quality materials, so customers are not paying for callbacks. ## How a visit works 1. **Call or text.** Call or text (615) 426-9344 and tell us what's going on. A photo helps. We work Monday to Friday, 8 a.m. to 5 p.m. 2. **A free diagnostic visit.** We come look, find the cause and explain it in plain words. The visit is free. 3. **A firm price before any work starts.** You get the price for the job before we begin, so you can decide with real numbers. 4. **The work, done right the first time.** Current methods, good equipment and quality materials. We keep overhead low and skip the callbacks, which keeps prices down. 5. **Follow-up.** If anything we worked on gives you trouble, call or text the same number. ## How does a ductless mini-split work? It's a heat pump without the ducts. An outdoor unit connects to one or more indoor heads through a small bundle of refrigerant lines, wiring and a drain, which passes through a hole about 3 inches across. Each head heats or cools its own space, and each has its own remote or wall control. Because the air doesn't travel through ducts, none of it is lost to leaks in an attic or crawl space. ## Is a mini-split a good fit for a garage or bonus room? Often, yes. Rooms over a garage are hard for a central system to reach: they sit at the end of the longest duct run, above an unheated space, under a hot roof. A mini-split gives that room its own heating and cooling. A garage is a good candidate too, for a workshop, a home gym or just a cooler place to park in August. Insulation matters there. An uninsulated garage door or walls make any system work harder, and we'll say so if that's the bigger problem. ## Mini-split or extending the ductwork? If the existing system has capacity to spare and the ducts can reach the new room, extending them may cost less. If the system is already working hard, or the room is far from the air handler, a mini-split usually makes more sense. We'll look at both and give you a firm price for each, so you can compare them. ## Where we offer mini-splits - [Columbia, TN](https://roothousemechanicals.com/service-areas/columbia-tn) - [Spring Hill, TN](https://roothousemechanicals.com/service-areas/spring-hill-tn) - [Franklin, TN](https://roothousemechanicals.com/service-areas/franklin-tn) - [Thompson's Station, TN](https://roothousemechanicals.com/service-areas/thompsons-station-tn) - [Brentwood, TN](https://roothousemechanicals.com/service-areas/brentwood-tn) - [Nolensville, TN](https://roothousemechanicals.com/service-areas/nolensville-tn) - [Nashville, TN](https://roothousemechanicals.com/service-areas/nashville-tn) - [Murfreesboro, TN](https://roothousemechanicals.com/service-areas/murfreesboro-tn) - [Smyrna, TN](https://roothousemechanicals.com/service-areas/smyrna-tn) - [Mount Pleasant, TN](https://roothousemechanicals.com/service-areas/mount-pleasant-tn) ## Common questions ### Do you install new mini-splits? Yes. We install single-zone and multi-zone mini-splits for homes, additions, garages and new construction, and we repair existing ones. ### Who does the mini-split work? Mini-split work is done by licensed and insured techs. You get one price from Root House, including any electrical or finish work. ### Can a mini-split heat in the winter? Yes. A mini-split is a heat pump, so it heats and cools. Many models keep heating well below freezing, which covers most of a Middle Tennessee winter. ### How long does a mini-split install take? A single-zone install is often done in a day. Multi-zone systems, long line runs and installs that need a new electrical circuit take longer. We'll tell you what to expect when we give you the price. ### How often should mini-split filters be cleaned? Check the washable filters in each indoor head every month or so during heavy use, and rinse them when they look dusty. The coil and blower wheel need a deeper cleaning from time to time, especially if the head starts to smell musty. ### Will the lines show on the outside of the house? Usually a short run shows where the lines leave the wall and drop to the outdoor unit. A line-set cover, which can often be painted to match, keeps it neat. We will talk through where the lines go before any work starts. ### Do you repair mini-splits someone else installed? Yes. We'll look at it for free, find what's wrong and give you a firm price before any work starts. ## Related - [Heat Pump Repair and Installation](https://roothousemechanicals.com/hvac/heat-pumps) - [HVAC Tune-Ups and Maintenance](https://roothousemechanicals.com/hvac/hvac-maintenance) - [Ductwork Repair, Sealing and Installation](https://roothousemechanicals.com/hvac/ductwork) - [AC Repair](https://roothousemechanicals.com/hvac/ac-repair) - [Electrical Panel and Meter Base Upgrades](https://roothousemechanicals.com/electrical/panel-upgrades) - [Outlets, Switches, GFCI and Rewiring](https://roothousemechanicals.com/electrical/outlets-and-wiring)