Mini-Split Installation: Professional & DIY Options
Mini-split installation is more involved than window or portable AC setup. It requires mounting indoor and outdoor units, running refrigerant lines, and electrical work. Here is what to expect whether you hire a pro or do it yourself.
Professional Installation
Most homeowners should hire a licensed HVAC technician. The process typically takes 4-8 hours for a single-zone system and involves:
- Selecting optimal locations for indoor and outdoor units
- Drilling a 3-inch hole through the exterior wall
- Mounting the indoor unit on a wall bracket (7+ feet high)
- Installing the outdoor unit on a concrete pad or wall bracket
- Running and connecting refrigerant lines, drain line, and electrical cable
- Vacuuming the lines and releasing refrigerant
- Running a dedicated 220V circuit (for most systems)
- Testing and commissioning
DIY Mini-Split Installation
Brands like MrCool offer pre-charged DIY systems with quick-connect fittings that do not require a vacuum pump or refrigerant handling. You still need basic tools, a drill with a 3-inch hole saw, and a licensed electrician for the dedicated circuit. DIY installation saves $1,000-$2,000 on labor.
Cost Comparison
| Item | Professional | DIY |
|---|---|---|
| Equipment (single-zone 12K BTU) | $800–$1,500 | $1,200–$1,800 |
| Labor | $1,000–$2,500 | $0 |
| Electrician | Included | $200–$500 |
| Total | $1,800–$4,000 | $1,400–$2,300 |
Where to Place the Indoor Unit
The indoor unit should be mounted on an exterior wall (shorter line run), 7 feet or higher from the floor, away from direct sunlight, and not directly above a bed or desk (the airflow can be uncomfortable). Leave at least 6 inches of clearance above and 3 feet in front for airflow.