Mini Split Installation in Franklin, TN
A new system here will heat from October through April and cool from May through September every year. Tell us about the house, and a licensed contractor who covers Williamson County will get in touch.
Tell us about the job
It takes about a minute.
What a mini-split in Franklin has to handle
A mini-split here runs nearly year round. It carries the heat from October through April, then switches over and carries the cooling from May through September. That is 12 months of work, not a season with a break in it.
Winter nights average 30°F, so the heat pump side has to hold up on cold nights, not just take the edge off. Summer afternoons average 88°F, and the compressor has to keep pulling that heat out of the house all summer. Any mini-split installed new has to meet 14.3 SEER2 for cooling and 7.5 HSPF2 for heating, the federal minimum for split-system heat pumps since January 2023. Williamson County also sees its share of winter storms and damaging wind. When the power goes out, a mini-split does not restart on its own the way some other systems do, so after an outage it needs to be turned back on.
- 7 months
- October through April, your system heats
- 5 months
- May through September, it cools
- 30°F
- the average winter night it heats against
- 88°F
- the average summer afternoon it cools against
NOAA nClimDiv, 1991–2020 normals
- Is a mini split worth it?
- For most homes it is, especially if you're heating or cooling a room your ductwork doesn't reach well, like a garage, sunroom, or addition. You get heat and cooling from one system, and you're not paying to run ducts through a wall you'd rather not open up. Franklin homes need heat from October through April and cooling from May through September, so the unit is working most of the year, which helps make the case for one. A contractor can look at your specific rooms and tell you whether it makes sense for your house.
- How many rooms can a mini split cover?
- A single outdoor unit can run one indoor head or several, depending on the system. Each indoor head is sized for the room it's in, so a bedroom and a living room might need different capacities even on the same outdoor unit. The right number of zones depends on your layout and how many rooms you actually want independent temperature control in. A contractor can size the system room by room for your house.
- Can a mini split heat a whole house?
- It can, if it's designed for that from the start with enough indoor heads to cover every room you use. Winter nights in Franklin average 30°F from December through February, so the heat pump needs to be sized for that low, not just for a mild fall day. A single wall unit in one room won't heat a whole house. A contractor can work out whether a whole-house mini split setup fits your home or whether you're better off pairing it with your existing heat source.