Mini Split Installation in St. Paul, MN
A new system here will heat from October through May and cool from June through August every year. Tell us about the house, and a licensed contractor who covers Ramsey County will get in touch.
Tell us about the job
It takes about a minute.
St. Paul asks a mini-split to work most of the year
Your mini-split needs to heat from October through May and cool through the summer, 11 months of work most years. Winter nights average 10°F here, cold enough that the unit installed has to be rated to keep pulling heat at that temperature, not just tolerate it. Summer afternoons average 80°F, a lighter load than the winter side carries.
Any mini-split installed new has to meet the federal minimum for a split-system heat pump, 14.3 SEER2 for cooling and 7.5 HSPF2 for heating. That minimum was not written with 10°F nights in mind, so a cold-climate model built to keep producing heat at that temperature is what this area calls for.
- 8 months
- October through May, your system heats
- 3 months
- June through August, it cools
- 10°F
- the average winter night it heats against
- 80°F
- the average summer afternoon it cools against
NOAA nClimDiv, 1991–2020 normals
Minnesota has no state license for HVAC contractors.
Minnesota has no state license and no registration for HVAC contractors, so there is no number to check and no state board that tested this contractor before they took the job. Nothing about them is filed with the state either way.
For a mini-split installation, most cities and counties in Minnesota require a permit and an inspection once the work is done. That inspection, done by the local building office, is what stands between you and work nobody else checked.
Source: Minnesota Office of the Revisor of Statutes
- Is a mini split worth it?
- For the right space, yes. A mini split heats and cools without ductwork, so it works well for additions, garages, or homes that rely on other heat but need help in one or two rooms. Here, winter lows average 10°F, and cold-climate mini splits are built to keep producing heat at those temperatures, which matters since homes in St. Paul need heat from October through May. Whether it's worth it for your house depends on what you're trying to heat or cool and what's there now, which a contractor can walk through with you.
- How many rooms can a mini split cover?
- A single-zone mini split covers one room or open area. A multi-zone system connects one outdoor unit to several indoor heads, so it can cover multiple rooms, each with its own indoor unit and its own thermostat. The right number of zones depends on the size and layout of the space, so a contractor sizing the job will look at the actual rooms rather than a general rule.
- Can a mini split heat a whole house?
- It can, if it's designed for that from the start. A multi-zone mini split with enough indoor units, sized and placed to cover every room, can carry the full heating load, and cold-climate models are built to keep working through winters like St. Paul's, where nights average 10°F from December through February. Whether that makes sense for a given house depends on its layout and how the rooms connect, which is something a contractor needs to look at in person before sizing a system.