Mini Split Installation in Lexington, SC
A new system here will heat from November through March and cool from May through September every year. Tell us about the house, and a licensed contractor who covers Lexington County will get in touch.
Tell us about the job
It takes about a minute.
Ten months of work a year, on both ends of the thermometer
Lexington County asks a mini-split to run almost all year. Homes here need heat from November through March and cooling from May through September, ten months of work with barely a break between them. Winter nights average 36°F, summer afternoons average 91°F, and the same unit has to handle both.
A new system installed today has to meet the federal minimum for split-system heat pumps, 14.3 SEER2 for cooling and 7.5 HSPF2 for heating. That floor applies whether you are replacing a unit or adding a new zone. With 325 damaging wind events recorded here over the past ten years, it is also worth knowing that a mini-split heat pump comes back on by itself once power returns, with no pilot light or restart needed.
- 5 months
- November through March, your system heats
- 5 months
- May through September, it cools
- 36°F
- the average winter night it heats against
- 91°F
- the average summer afternoon it cools against
NOAA nClimDiv, 1991–2020 normals
- Is a mini split worth it?
- For most homes here, yes, since a mini split gives you 5 months of heat and 5 months of cooling from one system. Lexington homes need heat from November through March and cooling from May through September, so the same unit covers nearly the whole year. It also heats and cools the specific room it's mounted in, without ductwork losing air along the way. Whether it's the right call for your house depends on how many rooms you need covered and what's heating or cooling those rooms now, and a contractor can walk through that with you.
- How many rooms can a mini split cover?
- A single outdoor unit can run one indoor head or several, depending on the system. Single-zone systems cover one room or open area. Multi-zone systems tie several indoor heads back to one outdoor compressor, so you can heat or cool multiple rooms independently. The right number for your house comes down to the size and layout of the rooms you want covered, which is something a contractor sizes on site.
- Can a mini split heat a whole house?
- It can, if it's sized and placed for that. A multi-zone mini split with enough indoor heads can heat every room in a house the same way a furnace does, and heat pumps are built to keep working through Lexington's winter lows, which average 36°F. What decides whether it works for your house is how many zones you need and how those rooms are laid out, which takes a contractor's walkthrough to size correctly.