North Dakota HVAC Guide
A tabby cat sleeps curled up on a dark grey bed in a modern bedroom equipped with a wall-mounted air conditioning unit.

Mini Split Installation in Cavalier, ND

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 Pembina County will get in touch.

Tell us about the job

It takes about a minute.

Step 1 of 3: Equipment
An orange cat sleeps on a neatly made bed with dark grey bedding in a minimalist bedroom with wall sconces and a mounted air conditioner.

Cavalier asks a mini-split to run almost year round

Winter nights here average 1°F from December through February. A mini-split has to pull heat out of air that cold, and it has to do that from September through May, nine months a year. Cooling only takes over for July and August, when afternoons average 78°F, so the system gets little rest either way.

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. There is no separate rule for ductless units. With the system running 11 months of the year here, how it performs in the cold matters as much as the number on the label. North Dakota also saw 7% of households lose power for 24 hours or more in 2024, and a standard outdoor unit will not run without it.

9 months
September through May, your system heats
2 months
July through August, it cools
1°F
the average winter night it heats against
78°F
the average summer afternoon it cools against
Isometric cutaway illustration of a small gray house showing two rooms, one with a sofa and one with a bed, each with a wall-mounted indoor air conditioning unit connected by line sets to an outdoor condenser unit on the ground outside.
Your system heats September through May and cools July through August.

NOAA nClimDiv, 1991–2020 normals

North Dakota requires HVAC contractors to hold a state license.

The license is held by the contractor, not issued for each job. It covers who is doing the work, not this specific installation. North Dakota also sets a threshold for when that license is required. Work under $4,000 does not need a licensed contractor, so whether that requirement applies here depends on the cost of the job.

Beyond the state license, most cities and counties require a permit for this kind of installation, with an inspection once the work is finished. That inspection is what checks the work locally, separate from whatever the state license does or does not cover.

Sources: North Dakota Legislative Branch · North Dakota Secretary of State

Is a mini split worth it?
For most homes here, yes, since heat or cooling is needed 11 months of the year. A mini split cools in July and August, then keeps working right through the cold months when the low averages 1°F. Because it's a heat pump, check with a contractor about how it performs on the coldest nights, since that affects whether it can carry the house alone or work alongside another heat source.
How many rooms can a mini split cover?
A single outdoor unit can run one indoor head or several, so the number of rooms depends on which system goes in. A single-zone system heats and cools one room or open area. A multi-zone system ties several indoor heads to one outdoor unit, with each head running on its own thermostat. A contractor will size the system to the rooms in the house and how they're laid out.
Can a mini split heat a whole house?
It can, if the system is sized and placed for that. A multi-zone mini split with enough indoor heads can cover a whole house, with each room or zone on its own head. Whether it can keep up on the coldest nights, when the low here averages 1°F, is something a contractor needs to check against the specific system and house.
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