Mini Split Installation in Rexburg, ID
A new system here will heat from September through June and cool from July through July every year. Tell us about the house, and a licensed contractor who covers Madison County will get in touch.
Tell us about the job
It takes about a minute.
A mini-split here works for the heat, not just the cold
Rexburg needs heat from September through June. That's ten months of the year the mini-split carries the load, with winter nights averaging 14°F from December through February. July is the only month cooling runs on its own, and summer afternoons only average 79°F. This is a system that earns its keep mostly on the heating side.
A new mini-split has to meet the federal minimum for a split-system heat pump. That's 14.3 SEER2 for cooling and 7.5 HSPF2 for heating. At 14°F a heat pump is working near the low end of what it can pull from outside air, so the unit and the sizing matter more here than they would somewhere with a shorter, milder winter.
- 10 months
- September through June, your system heats
- 1 months
- July through July, it cools
- 14°F
- the average winter night it heats against
- 79°F
- the average summer afternoon it cools against
NOAA nClimDiv, 1991–2020 normals
Idaho requires HVAC contractors to hold a state license.
The license belongs to the contractor, not to any single job, so it covers the person doing your installation rather than this specific mini-split. That license is issued through the state's HVAC Board.
Because Idaho licenses at the state level, that license is what stands behind whoever installs your mini-split. In most cities and counties, the job also needs a permit from the local building office and an inspection once the work is done, which checks that the unit was installed and connected correctly.
Sources: Idaho Legislature · Idaho Division of Occupational and Professional Licenses
- Is a mini split worth it?
- For most homes here, yes, especially if you're heating a space that doesn't have ductwork running to it. Homes here need heat from September through June, and winter nights average 14°F, so the unit has to earn its keep in cold weather, not just in summer. A mini-split is a heat pump, so it works both directions, cooling in July and heating the rest of the year. Whether it's worth it for your house depends on what you're heating now and how that room performs, which a contractor can walk through 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. Multi-zone systems tie one outdoor compressor to multiple indoor heads, each one controlling its own room. The number of rooms you can cover comes down to the sizing of the outdoor unit and how much heating and cooling each room needs, which is why a contractor measures the space before recommending a system.
- Can a mini split heat a whole house?
- It can, if it's sized and placed for that job, but it takes planning. A mini-split heats the rooms its indoor heads are in, so covering a whole house usually means a multi-zone system with a head in each main room, or in the rooms that need it most. Winter nights here average 14°F, so the system has to be sized for real cold, not just mild days. A contractor can look at your house and tell you whether a mini-split alone will carry it through winter or whether it should work alongside your existing heat.