A dark, minimalist bedroom with a king-size bed, wall-mounted air conditioning unit, and large windows, with a cat sleeping on the duvet.

Mini Split Installation in Grafton, 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 Walsh County will get in touch.

Tell us about the job

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Step 1 of 3: Equipment

What kind of equipment?*

A tabby cat sleeps on a dark quilted bed in a moody, minimalist bedroom with a black wall-mounted air conditioning unit.

Grafton winters ask a lot of a mini-split

Winter nights here average 1°F from December through February. A mini-split has to pull heat out of air that cold, and it runs most days from September through May to do it. That is 9 months of the year the outdoor unit is working, not just the coldest weeks.

Summer only asks for two months of cooling, with afternoons averaging 78°F, so the heating side of the system carries most of the load here. 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. In a place where heating runs nine months and cooling runs two, that heating rating is the one that matters most for what you will notice.

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.

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NOAA nClimDiv, 1991–2020 normals

North Dakota requires HVAC contractors to hold a state license.

The license is issued by the state to the contractor's business, not job by job. It covers who they are, not a sign-off on this particular install. North Dakota also sets a $4,000 line. Work under that amount does not need a licensed contractor at all. A mini-split installation often runs above that line, which puts it under the licensing rule rather than outside it.

Most cities and counties require a permit for this kind of job and an inspection once the work is done. That inspection is what checks the installation itself, separate from whether the contractor holds a state license.

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

Is a mini split worth it?: It depends on what you need it to do. A mini split cools in the summer and heats through the winter, so it can carry a room or a whole house through most of the year here. Winter nights in Grafton average 1°F from December through February, so ask the contractor whether the unit you're getting is rated to keep up on the coldest nights. For a room addition, a garage, or a house with no ductwork, a mini split often makes sense because there is no duct run to add.
How many rooms can a mini split cover?: That depends on how many indoor heads the outdoor unit runs. A single-zone system heats and cools just the one room it's mounted in. A multi-zone system runs several indoor heads off one outdoor unit, and each head has its own thermostat, so a bedroom and a living room can sit at different temperatures at the same time. A contractor can tell you how many zones a given outdoor unit supports.
Can a mini split heat a whole house?: It can, if there are enough indoor heads placed to reach every room. A house with an open layout might only need one or two heads to heat evenly, while a house with closed-off rooms and hallways needs a head in each space that doesn't get warm air from the others. A contractor sizes this by walking the house and checking how heat moves through it, not by square footage alone.

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