Mini Split Installation in Des Moines, IA
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 Polk County will get in touch.
Tell us about the job
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What a mini-split in Polk County has to work with
Your mini-split needs to work most of the year here, eight months of heat from October through May and three months of cooling in June through August. That's 11 months where the system is doing something, not sitting idle.
Winter nights average 16°F, which is real cold for a heat pump to pull warmth out of. Summer afternoons average 83°F on the other end. Any unit manufactured now has to meet 14.3 SEER2 for cooling and 7.5 HSPF2 for heating, the federal minimum for this kind of system, so it can handle both ends of that range.
- 8 months
- October through May, your system heats
- 3 months
- June through August, it cools
- 16°F
- the average winter night it heats against
- 83°F
- the average summer afternoon it cools against
NOAA nClimDiv, 1991–2020 normals
Iowa requires HVAC contractors to hold a state license.
Iowa licenses HVAC contractors through the Iowa Plumbing and Mechanical Systems Board. That means the state tested the contractor and keeps a record of the license. It covers the contractor, not the job, so it does not say anything about this particular installation on its own.
For a mini-split, that license is the thing standing behind the work. Most cities and counties in Iowa also require a permit for this kind of installation, with an inspection once the work is done, so someone besides the contractor looks at it before it is called finished.
Sources: Iowa Legislature · Iowa Department of Inspections, Appeals and Licensing
- Is a mini split worth it?
- For most homes here, yes, especially in a room that a furnace or central AC doesn't reach well. A mini split cools and heats that space directly, without ductwork. Modern units are built to the same efficiency floor as any other heat pump, 14.3 SEER2 and 7.5 HSPF2. With 8 months of heating and 3 months of cooling here, a system that does both well earns its keep. Whether it's the right call for your house depends on your layout and what you're heating now, and a contractor can walk through that with you.
- How many rooms can a mini split cover?
- A single indoor unit heats and cools one room or one open area well. If you need coverage in several rooms, a multi-zone system connects several indoor units to one outdoor unit, each with its own thermostat. A contractor sizes the system to the rooms you want covered, since the right output depends on how those rooms are built and how they're used.
- Can a mini split heat a whole house?
- It can, but it takes the right number of zones placed where the heat needs to go, not just one unit in one room. Winter nights here average 16°F, so the system has to be sized for that cold, not just for a mild day. Most homes here heat with gas, and a mini split is often added to cover specific rooms rather than replace the whole system. A contractor can tell you whether full coverage makes sense for your house or whether a mix makes more sense.