Mini Split Installation in Rupert, ID
A new system here will heat from September through May and cool from July through August every year. Tell us about the house, and a licensed contractor who covers Minidoka County will get in touch.
Tell us about the job
It takes about a minute.
Rupert asks a lot of a mini-split, most of the year
Your mini-split works nine months of the year here, from September through May, then again in July and August when it switches to cooling. That leaves almost no break between the two jobs. Winter nights average 18°F, cold enough that the heat pump has to work hard just to keep the house warm, and summer afternoons average 84°F on the other side of the calendar.
A new unit installed here needs to be sized and set up for both jobs, not just one. If it was manufactured this year or later, it has to meet 14.3 SEER2 for cooling and 7.5 HSPF2 for heating, the same federal minimum that applies to any split-system heat pump.
- 9 months
- September through May, your system heats
- 2 months
- July through August, it cools
- 18°F
- the average winter night it heats against
- 84°F
- the average summer afternoon it cools against
NOAA nClimDiv, 1991–2020 normals
Idaho requires HVAC contractors to hold a state license.
Idaho's HVAC Board issues the license to the contractor, not to the job. That covers the business doing the work, not this one mini-split installation on its own.
For the installation itself, the permit is what covers the job. In most cities and counties, putting in a mini-split needs a permit from the local building office, and the work gets inspected once it's done. That inspection checks the installation, separate from whatever the contractor's license already covers.
Sources: Idaho Legislature · Idaho Division of Occupational and Professional Licenses
- Is a mini split worth it?
- For a lot of homes here, yes, especially rooms that never seem to hold heat or cool air. A mini split puts heat right where the indoor unit is mounted, so it can handle a bonus room, a garage conversion, or an addition the main system was never sized for. Rupert winters average 18°F overnight, so check that the unit you're considering is rated to keep producing heat at those temperatures. Homes here need heat or cooling 11 months of the year, so a system that does both from one unit tends to earn its keep.
- How many rooms can a mini split cover?
- One outdoor unit can run one indoor head, or several, depending on the system. A single-zone system covers one room or open area. A multi-zone system runs several indoor heads off one outdoor condenser, with each head controlled on its own thermostat. How many rooms makes sense for a given house depends on the layout and how the walls and doors break up the space, which a contractor needs to walk through in person.
- Can a mini split heat a whole house?
- It can, if enough indoor heads are placed to cover every room, but it takes planning to do it right. A single head warms the room it's in and whatever space is open to it. Getting heat into every room means either enough zones or a layout with open sightlines between rooms, and Rupert's winter lows near 18°F mean the system also has to be sized and rated to keep up on the coldest nights. A contractor can look at the floor plan and say what it would take to heat the whole house this way.