DUCTLESS MINI-SPLIT INSTALL IN LEHI

Lehi has more good mini-split use cases than almost anywhere else we work. Detached casitas and ADUs are common on the larger Traverse Mountain and Skye Estates lots — separate structure, separate climate, no easy way to extend the main house ductwork. Finished basements in Holbrook Farms and Cold Springs Ranch homes that the main HVAC can't reach efficiently. Garage home offices (Lehi has a lot of remote workers from Adobe, Domo, Qualtrics, Pluralsight, and the surrounding tech tenants) that need year-round climate control without running new ducts through the wall. Bonus rooms over the garage that sit 8–15°F off the rest of the house no matter what the central system does. And occasional whole-home installs on older Lehi homes — particularly the historic stock around Main Street and Old Lehi — where running new ducts through plaster walls isn't realistic.

We don't sell mini-splits where central AC is the better answer. If you have working ductwork throughout the house and need a new system, central is almost always cheaper, faster, and has better long-term parts availability. Mini-splits are for the situations where ducts are missing, can't be extended, or where you want truly independent zone control on a few specific spaces.

Single-zone, multi-zone, and ducted mini-splits

• Single-zone — one outdoor unit, one indoor head. Most common for a casita, garage home office, finished basement, or a single bonus room. $3,800–$6,800 typical install
• Multi-zone — one outdoor unit, 2–5 indoor heads on separate thermostats. Best for a basement + bonus room combo, or a 2–3 bedroom finished addition. $7,500–$13,500 typical for 2–3 zones
• Ducted mini-split (concealed) — indoor unit hides in a soffit or small closet, serving 2–3 rooms through short ducts. Looks like central AC, runs at mini-split efficiency. Great for whole-home retrofits of older Lehi homes. $9,500–$16,500 typical

Brands we install in Lehi

Mitsubishi Electric is our default for Lehi — best cold-climate performance, most reliable electronics, best parts availability, 12-year compressor warranty when registered. Mitsubishi's Hyper-Heat (H2i) models work at full capacity down to -13°F, which matters for the bench-side and mountain-side homes in Traverse Mountain that catch colder temps and stronger wind chill than valley-floor homes. Daikin and LG are also solid alternatives. We avoid the cheap off-brand units (Pioneer, Senville, etc.) — install labor is the same but you'll be hunting for parts in year five.

Smart-home integration

Mitsubishi Kumo Cloud, Daikin Onecta, and LG ThinQ all integrate with Google Home, Apple Home, and Alexa out of the box. For Home Assistant, Hubitat, or SmartThings users — most Lehi tech-employed customers — we set up the integration during install and leave you the configs. Mitsubishi via the MELCloud or local Kumo integrations is solid; Daikin via the official Home Assistant integration works well; LG is more limited but improving.

What Valley does differently

Mini-split installs live or die on three things: line-set brazing under nitrogen flow (keeps copper clean, prevents oxidation), full vacuum to 500 microns before charging (proves the system is sealed), and correct mounting height and airflow direction on the indoor head. We do all three on every install. Cheap installers skip the nitrogen purge and the deep vacuum, and two years later the system is leaking refrigerant from oxidized braze joints. We've replaced a lot of those.

Every install pulls the Lehi City permit, registers the manufacturer warranty in your name (12-year parts on Mitsubishi when registered properly), and comes with our 2-year Valley labor warranty. Quality Service Club HVAC members get the warranty extended to the life of membership plus free annual mini-split service on every indoor head.

When a mini-split is NOT the right answer in Lehi

If you already have working ductwork throughout the home and just need a new central AC, standard central is almost always cheaper, faster, and has better long-term parts availability. If you want heating down to -15°F in a primary living space, a gas furnace or a cold-climate heat pump matched with one beats a standard mini-split. And if you hate the look of indoor heads mounted on walls, a ducted mini-split costs more — worth knowing going in.