Wall-Mounted Ductless Cooling System
Note: Inventory changes regularly. If you do not see the size you need, call us. We may have it in stock or can advise on the next best option.
Best AC Surplus offers wall-mounted mini split systems for sale at prices well below what you would pay at a big-box store or HVAC distributor. We stock brand new, scratch and dent, and surplus units, depending on availability.
If you need an affordable ductless 18,000 BTU Mini Split AC unit for a single room, a garage, a small office, or an addition, we have what you need.
A ductless mini split air conditioner is a cooling system that works without traditional ductwork. It uses an outdoor condenser unit connected to a wall-mounted indoor air handler through a small conduit.
A complete mini split system is one of the most practical cooling solutions for Florida’s heat, especially in spaces that do not have existing ductwork or that need independent temperature control.
The wall unit draws warm air from your room.
The refrigerant carries absorbed heat to the outdoor condenser where it is released.
The indoor fan blows cooled air back into the room.
Cool a single room without affecting the rest of the house
Turn a hot, unusable garage into a comfortable workspace
Maintain your own temperature without adjusting the whole home system
Reliable cooling for dedicated workspaces with no existing ducts
The easiest cooling solution when adding a new room to an existing home
Individual room control without central system access
| Feature | Mini Split System | Central AC System |
|---|---|---|
| Ductwork Needed | No | Yes |
| Installation Scope | Simple | Yes |
| Best For | Single Rooms & Zones | Whole Home Cooling |
| Temperature Control | Room-by-Room Control | Whole Home at Once |
| Energy Efficiency | Very High | Moderate to High |
| Upfront Cost | Lower | Higher |
| Ideal for Florida Use | Excellent | Excellent |
The BTU in our 18,000 BTU discount mini split factory-direct AC system stands for British Thermal Unit. It measures how much cooling power a unit delivers. Getting the right size matters.
| Room Size (sq ft) | Recommended BTU Capacity |
|---|---|
| Up to 300 sq ft | 9,000 BTU |
| 300 – 450 sq ft | 12,000 BTU |
| 450 – 700 sq ft | 18,000 BTU (Currently in Stock) |
| 700 – 1,000 sq ft | 24,000 BTU |
| 1,000+ sq ft | 36,000 BTU or Multi-Zone System |
Florida’s heat and humidity may push your needs one size higher. When in doubt, call us, and we can help you figure out the right unit for your space.
The BTU in our 18,000 BTU discount mini split factory-direct AC system stands for British Thermal Unit. It measures how much cooling power a unit delivers. Getting the right size matters.
Mini splits require handling refrigerant, which legally requires an EPA 608 certified technician in Florida. We recommend hiring a licensed contractor for installation.
