Mini Split Installation in Farmington, MO
A new system here will heat from October through April and cool from June through September every year. Tell us about the house, and a licensed contractor who covers St. Francois County will get in touch.
Tell us about the job
It takes about a minute.
Eleven months of work for a Farmington mini-split
Your mini-split earns its keep here. Heat from October through April, cooling from June through September, that's 11 months with only a short break between. Winter nights average 25°F, and summer afternoons run to 86°F, so the unit you install has to handle both ends without much rest.
Any mini-split installed new has to clear the federal minimums for a split-system heat pump, 14.3 SEER2 for cooling and 7.5 HSPF2 for heating. St. Francois County has seen 7 winter storms and 54 damaging wind events over the past ten years, and 19% of Missouri households lost power for at least 24 hours in 2024. Most homes here heat with electricity, so when the power drops, so does the heat until it's back.
- 7 months
- October through April, your system heats
- 4 months
- June through September, it cools
- 25°F
- the average winter night it heats against
- 86°F
- the average summer afternoon it cools against
NOAA nClimDiv, 1991–2020 normals
- Is a mini split worth it?
- For the right room or house, yes. A mini split heats and cools without ducts, and it holds a steady temperature in whatever space its indoor unit serves. Here, homes need heat from October through April and cooling from June through September, so a system that runs most of the year gets used enough to matter. Whether it makes sense for your house depends on how many rooms you need covered and what's heating or cooling them now, which a contractor can walk through with you.
- How many rooms can a mini split cover?
- One outdoor unit can run several indoor heads, so a single mini split system can cover more than one room. Each head handles its own room or open area, and you set the temperature on each one separately. The right number for your house depends on the layout and how those rooms connect, which a contractor will work out when sizing the system.
- Can a mini split heat a whole house?
- It can, if there's an indoor head in every room that needs heat. A mini split is a heat pump, and heat pumps here have to handle winter nights averaging 25°F, so the system has to be sized for that low before it's asked to cover the whole place. A contractor will look at your home's layout and heat loss to tell you how many heads it takes and whether the equipment they're speccing is rated to keep up on the coldest nights.