Mini Split Installation in Custer, SD
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 Custer County will get in touch.
Tell us about the job
It takes about a minute.
Custer County asks a mini-split to work almost year round
Winter nights here average 15°F from December through February, and a mini-split's heat pump has to keep pulling warmth out of that cold air for nine months, September through May. Come July and August the same unit switches to cooling through afternoons that average 81°F. That leaves only one month where it isn't carrying the load either way.
Any mini-split installed new has to meet the federal minimum for split-system heat pumps, 14.3 SEER2 for cooling and 7.5 HSPF2 for heating. With storms knocking out power here 125 times over the last ten years and damaging wind hitting 158 times in that same stretch, the unit and its installation both need to hold up, not just meet the number on paper.
- 9 months
- September through May, your system heats
- 2 months
- July through August, it cools
- 15°F
- the average winter night it heats against
- 81°F
- the average summer afternoon it cools against
NOAA nClimDiv, 1991–2020 normals
In South Dakota, HVAC licensing for homes is left to the cities and towns.
Custer County has no state HVAC license to check, since South Dakota leaves that decision to cities and towns. Whether a license is required here depends on whether the county or the nearest town has set up its own rule. There's no state test or state record either way.
What you can count on is the permit. Installing a mini-split is the kind of job most local building offices require a permit for, and an inspection once the work is done. That inspection checks the wiring and the unit itself were done right. It isn't a license, but in most of Custer County it's the record that exists.
Source: South Dakota Legislature
- Is a mini split worth it?
- For most homes here, yes, because a mini split handles both jobs, heat from September through May and cooling in July and August. A heat pump system like this keeps working in cold weather, and with winter nights averaging 15°F here, that matters. It also gives you cooling for the two months when summer afternoons average 81°F. Whether it makes sense for your house depends on how the space is laid out and what heat source you have now, so a contractor should look at both before you decide.
- How many rooms can a mini split cover?
- A single outdoor unit can run one indoor head or several, depending on the system. Single-zone systems cover one room or open area. Multi-zone systems tie several indoor heads to one outdoor unit, with each head controlled on its own. How many rooms yours should cover depends on the size of each room and how the house is laid out, which is something a contractor needs to measure in person.
- Can a mini split heat a whole house?
- It can, if enough indoor heads are placed to reach every room. A multi-zone mini split with a head in each main area heats the same way a furnace would, room by room instead of through ducts. With heat needed here from September through May and winter nights averaging 15°F, the system has to be sized to keep up on the coldest nights, not just the mild ones. A contractor can work out how many heads and what capacity your house needs.